Contents  on 15 May '19

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 15 May '19

Twelve objects reported inside ten LD

Today twelve asteroidal objects are reported inside ten lunar distances (LD) of our planet today. Four of them are the closest, traveling between 3.55 and 5.89 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
2.0   LD May 10* 2019 JJ3 11 m  9.5 to 11.6 LD May 6 - 15 Earth passage uncertainty
+/- 8 mins.*, exits ten LD, risk
2.34 LD May 13 2019 JW5 12 m  3.55 to 5.74 LD May 10 - 17
2.48 LD May 20 2019 JL3 36 m  8.84 from 10.74 LD today - May 25 enters ten LD - DOU
3.15 LD May 13 2019 JK3 15 m  4.08 to 5.89 LD May 9 - 17
3.64 LD May 12 2019 JO2 25 m  7.28 to 9.46 LD May 8 - 16 DOU
4.14 LD May 17 2012 KT12 19 m  4.38 from 4.75 LD May 7 - 27 NHATS target
4.43 LD tomorrow 2019 JN5 27 m  4.43 from 5.32 LD May 12 - 19 DOU
4.69 LD April 27 2019 GF1 10 m  8.46 to 8.80 LD April 7 - May 19 NHATS target
5.56 LD May 17 2019 JG1 16 m  5.89 from 6.72 LD May 12 - 21 NHATS target - DOU
6.09 LD May 17 2019 GT1 34 m  6.34 from 6.64 LD May 8 - 26 NHATS target
6.43 LD May 10 2019 JN3 13 m  9.90 to 11.10 LD May 4 - 15 NHATS target, exits ten LD
7.04 LD today 2019 JN2 25 m  7.04 LD May 10 - 19 NHATS target, Earth closest
at 0214 UTC - DOU

This report was generated at 2215 UTC with follow-up in today's DOU MPEC for inbound objects 2019 JN5, 2019 JL3, and 2019 JG1, passing 2019 JN2, outbound 2019 JO2, and departed 2019 JU5.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 15 May '19

The MPC's NEO Confirmation Page has 59 listings

When last checked at 2357 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 59 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 65 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 15 May '19

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< OOC on 15 May '19 -- MPEC 2019-J142 - "14:22 UT" - Observations and Orbits of Comets


<< DOU on 15 May '19 >>  MPEC 2019-J141 - "12:06 UT" - Daily Orbit Update

Observers  on 15 May '19

A total of 264 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 38 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, 2019 C1, P/2019 B2, C/2019 B1, P/2019 A7, P/2019 A6, P/2019 A4, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 A3, C/2017 T2, C/2017 M4, C/2016 R2, C/2016 N6, C/2015 O1, C/2014 B1, 373P, 361P, 247P, 243P, 239P, 175P, 123P, 74P, 68P, 64P, 60P, 59P, 49P, 46P, 38P, 31P, 29P, 21P
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2019-J142 -- 46P
349Ageo Obs. in Japan, 74 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, P/2019 B2, C/2019 B1, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V1, C/2018 R3, P/2018 P3, C/2018 N2, C/2018 L2, C/2018 F1, C/2018 E1, C/2018 A6, C/2018 A3, C/2017 T2, C/2017 M5, C/2017 M4, C/2017 K6, C/2017 K4, C/2017 K2, C/2017 E3, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 O1, C/2014 OE4, C/2014 B1, C/2011 KP36, C/2010 U3, 375P, 373P, 371P, 369P, 368P, 364P, 361P, 300P, 247P, 243P, 240P, 239P, 231P, 171P, 164P, 159P, 137P, 131P, 130P, 129P, 123P, 78P, 74P, 68P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P
B54Ager Obs. in Spain, 4 in MPEC 2019-J142 -- C/2015 O1, 232P, 164P, 38P
C97Al-Fulaij Obs., 6 in MPEC 2019-J142 -- C/2018 Y1, C/2015 O1, 123P, 60P, 46P, 38P
L17Albanya Obs., 2 in MPEC 2019-J142 -- 64P, 46P
J24Altamira Obs. in the Canary Islands, 36 in MPEC 2019-J142 -- C/2019 F1, C/2019 B3, C/2018 V1, C/2018 N2, C/2018 A3, C/2017 T2, C/2017 M4, C/2016 R2, C/2016 A1, C/2015 O1, C/2010 U3, 361P, 247P, 243P, 240P, 223P, 213P, 171P, 164P, 159P, 137P, 130P, 123P, 78P, 74P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 29P, 21P
K40Altdorf Obs. in Germany, 8 in MPEC 2019-J142 -- C/2018 Y1, C/2018 V1, C/2015 O1, 123P, 64P, 60P, 46P, 38P
X39Antares Obs., 1 in MPEC 2019-J142 -- C/2018 N2
R57Aorangi Iti Obs., 1 in MPEC 2019-J142 -- C/2019 B3
E23Arcadia Obs. in New South Wales, 3 in MPEC 2019-J142 -- C/2019 F2, 2019 C1, 46P
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2019-J142 -- 2019 G2, C/2018 W1, P/2017 S8
T05ATLAS Haleakala in Hawaii, 79 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, 2019 C1, C/2019 B3, P/2019 B2, C/2019 A9, P/2019 A8, P/2019 A2, C/2018 Y1, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, C/2018 V2, P/2018 P4, P/2018 P3, C/2018 N2, C/2018 E1, C/2018 C2, C/2018 B1, C/2018 A6, C/2018 A3, C/2017 T2, C/2017 M5, C/2017 M4, C/2017 K6, C/2017 K4, C/2017 K2, C/2017 E3, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 V1, C/2015 O1, C/2014 R3, C/2014 OE4, C/2014 B1, C/2011 KP36, C/2010 U3, 375P, 374P, 373P, 369P, 368P, 361P, 300P, 247P, 246P, 243P, 240P, 239P, 232P, 231P, 209P, 183P, 171P, 164P, 159P, 149P, 137P, 130P, 123P, 78P, 74P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 31P, 29P, 21P
T08ATLAS Mauna Loa in Hawaii, 86 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, C/2019 E3, P/2019 D2, C/2019 D1, 2019 C1, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, C/2018 V2, P/2018 P3, C/2018 N2, C/2018 F4, C/2018 E1, C/2018 C2, C/2018 B1, C/2018 A6, C/2018 A3, C/2017 T2, C/2017 M5, C/2017 M4, C/2017 K6, C/2017 K4, C/2017 K2, C/2017 E3, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 V2, C/2015 V1, C/2015 O1, C/2014 R3, C/2014 OE4, C/2014 B1, C/2013 C2, C/2011 KP36, C/2010 U3, 375P, 374P, 373P, 369P, 368P, 361P, 300P, 247P, 246P, 243P, 240P, 239P, 231P, 215P, 209P, 171P, 164P, 159P, 149P, 137P, 130P, 123P, 117P, 78P, 74P, 68P, 65P, 64P, 60P, 59P, 49P, 48P, 47P, 46P, 38P, 31P, 29P, 21P
467Auckland Obs. in New Zealand, 1 in MPEC 2019-J142 -- C/2019 D1
I47Auger Obs. in Argentina, 30 in MPEC 2019-J142 -- C/2019 J1, C/2019 H1, P/2019 G1, C/2019 F2, C/2019 F1, C/2019 E3, C/2019 D1, 2019 C1, C/2019 B3, P/2019 B2, P/2019 A2, P/2019 A1, C/2018 Y1, C/2018 V4, C/2018 V2, C/2018 N2, C/2018 E2, C/2018 E1, C/2018 A6, C/2017 B3, C/2016 M1, C/2015 V2, 300P, 260P, 78P, 60P, 48P, 38P, 29P, 21P
069Baldone Obs. in Latvia, 4 in MPEC 2019-J142 -- C/2018 W2, C/2016 R2, 59P, 38P
C77Bernezzo Obs. in Italy, 12 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 A9, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X2, C/2018 W1, P/2018 C1, P/2017 TW13, P/2017 S5, 46P
C86Blanes Obs. in Spain, 9 in MPEC 2019-J142 -- C/2018 Y1, C/2017 T2, 123P, 78P, 64P, 48P, 46P, 38P, 29P
Q68Blue Mountains Obs. in New South Wales, 15 in MPEC 2019-J142 -- C/2018 N2, C/2018 A6, C/2017 T2, C/2016 N6, C/2016 M1, C/2015 V2, C/2015 V1, 364P, 137P, 78P, 65P, 60P, 48P, 46P, 21P
B96Brixiis Obs. in Belgium, 35 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 B1, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 W1, C/2018 U1, C/2018 A3, C/2017 T2, C/2017 K4, C/2017 K2, C/2016 R2, C/2016 A1, C/2015 O1, C/2010 U3, 247P, 240P, 209P, 171P, 164P, 149P, 137P, 131P, 123P, 78P, 68P, 64P, 60P, 59P, 49P, 46P, 38P, 37P, 29P
073Bucharest Obs. in Romania, 1 in MPEC 2019-J142 -- 21P
215Buchloe Obs. in Germany, 86 in MPEC 2019-J142 -- C/2019 H1, P/2019 GG21, 2019 G2, P/2019 G1, C/2019 F2, C/2019 F1, P/2019 E1, P/2019 D2, C/2019 D1, 2019 C1, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X3, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, C/2018 V4, C/2018 V2, C/2018 V1, C/2018 U1, C/2018 R5, P/2018 P4, P/2018 P3, C/2018 L2, C/2018 E1, C/2018 B1, C/2018 A3, P/2017 TW13, C/2017 T2, C/2017 K6, C/2017 K2, C/2017 AB5, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 X5, C/2015 O1, C/2014 R3, C/2014 OE4, C/2014 B1, C/2011 KP36, C/2010 U3, 375P, 373P, 361P, 253P, 247P, 246P, 243P, 240P, 239P, 231P, 209P, 171P, 169P, 164P, 159P, 149P, 137P, 130P, 123P, 117P, 78P, 74P, 66P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P, 2P
U63Burnt Tree Hill Obs., 1 in MPEC 2019-J142 -- C/2019 F2
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2019-J141 -- 2008 WX32
W96Campo Catino Austral Obs. (CAO) in Chile, 22 in MPEC 2019-J142 -- P/2019 A2, C/2018 Y1, C/2018 V1, C/2018 N2, C/2018 F1, C/2018 E2, C/2018 E1, C/2018 A6, C/2017 T2, C/2016 N6, C/2016 M1, C/2015 V2, 240P, 171P, 130P, 123P, 64P, 60P, 46P, 38P, 29P, 21P
X74Campo dos Amarais Obs., 2 in MPEC 2019-J142 -- C/2019 J1, C/2019 F2
Z36Cancelada Obs., 3 in MPEC 2019-J142 -- 64P, 46P, 38P
Z46Cardiff Obs., 5 in MPEC 2019-J142 -- 123P, 64P, 60P, 46P, 38P
I72Carpe Noctem Obs. in Spain, 16 in MPEC 2019-J142 -- C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 A3, C/2017 T2, C/2016 A1, C/2015 O1, C/2010 U3, 247P, 240P, 171P, 164P, 123P, 64P, 46P, 38P
G36CASADO in Spain, 1 in MPEC 2019-J142 -- 103P
B53Casal Lumbroso Obs. in Italy, 2 in MPEC 2019-J142 -- 46P, 38P
B66Casasco Obs. in Italy, 4 in MPEC 2019-J142 -- C/2018 Y1, 64P, 46P, 38P
160Castelmartini Obs. in Italy, 31 in MPEC 2019-J142 -- C/2019 F2, C/2019 D1, C/2018 Y1, C/2018 L2, C/2017 T2, C/2017 M4, C/2016 R2, C/2016 N6, C/2015 O1, 368P, 247P, 240P, 232P, 223P, 198P, 171P, 164P, 137P, 131P, 123P, 78P, 64P, 60P, 59P, 49P, 46P, 38P, 37P, 31P, 29P, 21P
703Catalina Sky Survey (CSS) in Arizona, 66 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 D1, P/2019 B2, C/2019 B1, P/2019 A2, P/2019 A1, P/2018 X1, C/2018 W2, C/2018 W1, P/2018 VN2, C/2018 V2, C/2018 V1, P/2018 P3, C/2018 E1, P/2018 C1, C/2018 B1, C/2018 A6, C/2018 A3, P/2017 TW13, C/2017 T2, P/2017 S8, C/2017 M5, C/2017 K6, C/2017 K1, C/2017 D3, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 E1, C/2016 A1, C/2015 XY1, C/2015 O1, 375P, 374P, 373P, 371P, 368P, 357P, 247P, 246P, 243P, 240P, 239P, 231P, 223P, 209P, 171P, 164P, 159P, 149P, 137P, 130P, 123P, 78P, 74P, 66P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 21P, 10P
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 4 in MPEC 2019-J142 -- 2019 G2, C/2018 V4, C/2017 U2, P/2017 TW13
107Cavezzo Obs. in Italy, 3 in MPEC 2019-J142 -- C/2018 Y1, 46P, 38P
K51Celado Obs. in Italy, 8 in MPEC 2019-J142 -- C/2019 F2, C/2019 A9, P/2019 A2, C/2018 X2, C/2018 W1, P/2017 TW13, 46P, 38P
807.Scott Sheppard via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2019-J142 -- P/2019 GG21
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 13 in MPEC 2019-J142 -- C/2019 H1, P/2019 GG21, 2019 G4, 2019 G3, 2019 G2, C/2019 E3, C/2019 D1, C/2019 B3, C/2018 V4, 2018 V3, C/2018 V2, C/2018 E2, C/2018 E1
A77Chante-Perdrix Obs. in France, 43 in MPEC 2019-J142 -- C/2019 J2, C/2019 F2, C/2019 D1, C/2019 A9, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 V1, C/2018 R5, C/2018 N2, C/2018 L2, C/2018 B1, C/2018 A3, P/2017 TW13, C/2017 T2, P/2017 S8, P/2017 S5, C/2017 K2, C/2016 R2, C/2014 B1, C/2010 U3, 373P, 368P, 332P, 243P, 240P, 231P, 223P, 171P, 164P, 158P, 149P, 123P, 78P, 65P, 64P, 60P, 47P, 46P, 38P, 31P, 29P, 21P
970Chelmsford Obs. in England, 14 in MPEC 2019-J142 -- C/2019 B1, C/2019 A9, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V1, C/2017 K2, C/2016 A1, 64P, 46P, 38P, 37P, 29P
Z83Chicharronian 3C Obs. in Spain, 1 in MPEC 2019-J142 -- C/2018 Y1
B92Chinon Obs. in France, 1 in MPEC 2019-J142 -- 46P
J01Cielo Profundo Obs. in Spain, 23 in MPEC 2019-J142 -- C/2019 F1, C/2019 D1, C/2018 Y1, C/2018 W2, C/2018 V1, C/2018 A3, C/2017 K2, C/2016 R2, C/2015 O1, C/2010 U3, 130P, 123P, 78P, 74P, 68P, 64P, 60P, 59P, 48P, 46P, 38P, 29P, 21P
Z99Clixby Obs. in England, 7 in MPEC 2019-J142 -- C/2019 F2, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A2, C/2018 X2, C/2018 W1
C13Como Obs. in Italy, 1 in MPEC 2019-J142 -- C/2018 Y1
850Cordell-Lorenz Obs. in Tennessee, 20 in MPEC 2019-J142 -- C/2019 H1, C/2019 F2, C/2019 F1, C/2019 D1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 W1, C/2018 V2, C/2018 V1, C/2018 F1, C/2018 C2, P/2017 S8, P/2017 S5, C/2016 R2, 64P, 46P, 38P, 29P
B50Corner Obs. in Germany, 2 in MPEC 2019-J142 -- 29P, 21P
N55Corona Borealis Obs. in Tibet, 7 in MPEC 2019-J142 -- C/2019 J2, C/2019 J1, C/2018 V1, 123P, 60P, 46P, 38P
Z45Cosmos Obs., 2 in MPEC 2019-J142 -- 64P, 46P
Z39Costa Teguise Obs. in the Canary Islands, 21 in MPEC 2019-J142 -- P/2019 A2, C/2018 Y1, C/2017 T2, C/2016 R2, 368P, 243P, 240P, 239P, 171P, 164P, 159P, 130P, 123P, 74P, 64P, 60P, 59P, 48P, 46P, 38P, 29P
106Crni Vrh Obs. in Slovenia, 8 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, P/2019 A7, P/2018 Y2, C/2018 X3, C/2018 X2, P/2017 S8, 240P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2019-J142 -- C/2018 E1
958Dax Obs. in France, 6 in MPEC 2019-J142 -- C/2018 Y1, 243P, 78P, 59P, 46P, 29P
W84!program code "!" (10) via DECam in Chile, 2 in MPEC 2019-J142 -- P/2011 U2, 276P
K87Dettelbach Vineyard Obs. in Germany, 18 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, 2019 C1, C/2019 B1, C/2018 Y1, C/2018 A3, P/2017 TW13, C/2016 R2, C/2015 O1, 239P, 171P, 123P, 60P, 59P, 46P, 38P, 31P
G37Discovery Channel Telescope in Arizona, 1 in MPEC 2019-J142 -- 46P
L35DreamSky Obs., 6 in MPEC 2019-J142 -- C/2015 XY1, C/2015 O1, C/2014 OE4, 369P, 368P, 66P
113Drebach Obs. in Germany, 2 in MPEC 2019-J142 -- C/2018 W1, 38P
L29Drebach-South Obs., 5 in MPEC 2019-J142 -- C/2019 F2, 2019 C1, C/2019 B3, P/2019 B2, P/2019 A2
L05Dridri Obs. in Italy, 3 in MPEC 2019-J142 -- 123P, 64P, 46P
K02Eastwood Obs. in England, 29 in MPEC 2019-J142 -- C/2019 F1, C/2019 B1, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V1, C/2018 L2, C/2018 A3, C/2017 T2, C/2017 K6, C/2017 K2, C/2016 R2, C/2016 N6, C/2016 A1, C/2015 O1, C/2010 U3, 243P, 240P, 209P, 123P, 78P, 64P, 60P, 59P, 49P, 46P, 38P, 29P, 21P
K77EHB01 Obs., 18 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, P/2019 D2, C/2019 D1, C/2018 Y1, P/2018 X1, C/2018 W2, C/2018 R3, C/2010 U3, 375P, 247P, 240P, 239P, 231P, 164P, 68P, 31P
J36El Olivo Obs. in Spain, 1 in MPEC 2019-J142 -- 123P
I57Elche Obs. in Spain, 1 in MPEC 2019-J142 -- C/2018 W2
K68Elianto Obs. in Italy, 1 in MPEC 2019-J142 -- C/2018 V1
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 10 in MPEC 2019-J142 -- 2019 G3, C/2019 E3, P/2019 E2, P/2019 E1, C/2019 D1, 2019 C1, P/2018 X1, C/2018 W2, C/2018 U1, 375P
E85Farm Cove Obs. in New Zealand, 11 in MPEC 2019-J142 -- P/2019 G1, P/2019 A2, C/2018 Y1, C/2018 N2, C/2016 X1, C/2016 N6, 239P, 74P, 59P, 46P, 21P
734Farpoint Obs. in Kansas, 3 in MPEC 2019-J142 -- C/2019 F2, 2018 V3, C/2018 U1
595Farra d'Isonzo Obs. in Italy, 13 in MPEC 2019-J142 -- C/2019 F2, 2019 C1, C/2019 A9, P/2019 A2, C/2018 Y1, C/2018 X3, C/2018 X2, C/2018 W1, P/2018 C1, C/2017 T2, C/2015 O1, 59P, 38P
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2019-J142 -- 17P
F65+program code "+" (20) via Faulkes Telescope North in Hawaii, 2 in MPEC 2019-J142 -- C/2017 O1, C/2015 ER61
F652Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 2 in MPEC 2019-J142 -- P/2019 E2, 46P
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2019-J142 -- 17P
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 2 in MPEC 2019-J142 -- C/2018 E1, 46P
E10+program code "+" (20) via Faulkes Telescope South in New South Wales, 1 in MPEC 2019-J142 -- C/2015 V2
E10,program code "," (21) via Faulkes Telescope South in New South Wales, 1 in MPEC 2019-J142 -- P/2018 P4
K84Felliscopio Obs., 1 in MPEC 2019-J142 -- 21P
L19Felsina AAB Obs., 5 in MPEC 2019-J142 -- C/2019 H1, C/2019 F1, P/2019 A2, C/2018 Y1, 38P
K56Foligno Obs. in Italy, 2 in MPEC 2019-J142 -- 78P, 64P
K83Forti Obs., 8 in MPEC 2019-J142 -- C/2019 F1, C/2018 Y1, C/2016 N6, C/2010 U3, 78P, 59P, 46P, 38P
W46Foxfire Village Obs., 1 in MPEC 2019-J142 -- 123P
157Frasso Sabino Obs. in Italy, 8 in MPEC 2019-J142 -- C/2019 F1, P/2019 B2, P/2019 A2, P/2018 Y2, C/2018 X2, C/2018 W2, C/2018 W1, 209P
K97Freconrupt Obs., 12 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A3, C/2016 R2, C/2016 N6, C/2015 O1, 123P, 78P, 64P, 60P, 46P, 38P, 29P
I88Fuensanta de Martos Obs. in Spain, 4 in MPEC 2019-J142 -- C/2017 K2, 123P, 60P, 38P
G26Fushan Obs. in China, 8 in MPEC 2019-J142 -- C/2018 Y1, C/2018 L2, C/2016 N6, 123P, 64P, 46P, 38P, 29P
L34Galhassin Robotic Telescope, 3 in MPEC 2019-J142 -- C/2019 F2, C/2018 Y1, 46P
X31Galilei Obs., 4 in MPEC 2019-J142 -- C/2018 V4, C/2018 V2, C/2018 E1, C/2017 T2
372Geisei Obs. in Japan, 19 in MPEC 2019-J142 -- P/2019 G1, C/2019 F1, P/2019 D2, C/2019 D1, P/2019 B2, C/2019 B1, C/2018 Y1, C/2018 W2, C/2018 V1, C/2018 N2, C/2018 M1, C/2016 R2, C/2016 N6, C/2015 O1, 123P, 64P, 46P, 38P, 21P
189Geneva Obs., 1 in MPEC 2019-J142 -- 64P
E89Geyserland Obs. in New Zealand, 11 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A6, C/2016 N6, C/2016 M1, 78P, 74P, 60P, 59P, 46P, 29P, 21P
203GiaGa Obs. in Italy, 3 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, P/2018 C1
K88GINOP-KHK in Hungary, 15 in MPEC 2019-J142 -- C/2019 J2, P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, 2019 C1, C/2019 A9, P/2018 Y2, C/2018 X2, C/2018 W1, P/2018 VN2, C/2018 V4, C/2018 V2, C/2018 U1, P/2017 TW13
E94Gisborne Obs. in New Zealand, 22 in MPEC 2019-J142 -- 2019 C1, P/2019 B2, C/2018 Y1, C/2018 V4, C/2018 V2, C/2018 N2, C/2018 E1, C/2018 A6, C/2017 T2, C/2017 B3, C/2016 N6, C/2016 M1, C/2015 V2, C/2015 V1, 364P, 171P, 137P, 60P, 48P, 46P, 29P, 21P
190Gissar Obs. in Tajikistan, 1 in MPEC 2019-J142 -- 38P
083Golosseevo-Kiev Obs. in Ukraine, 1 in MPEC 2019-J142 -- C/2018 Y1
K73Gravina Obs. in Italy, 4 in MPEC 2019-J142 -- C/2018 Y1, 78P, 64P, 46P
J95Great Shefford Obs. in England, 10 in MPECs 2019-J141 & 2019-J142 -- 2019 JN5, 2019 JN2, C/2019 F2, P/2019 B2, C/2019 B1, C/2019 A9, C/2018 W1, C/2018 V1, C/2018 U1, C/2018 B1
238Grorudalen Obs. in Norway, 5 in MPECs 2019-J141 & 2019-J142 -- 2019 HC, C/2018 A3, 123P, 64P, 38P
134Groszschwabhausen Obs. in Germany, 4 in MPEC 2019-J142 -- C/2018 L2, 64P, 46P, 38P
458Guadarrama Obs. in Spain, 5 in MPEC 2019-J142 -- C/2018 Y1, 123P, 46P, 38P, 29P
A17Guidestar Obs. in Germany, 2 in MPEC 2019-J142 -- C/2019 F1, C/2018 W1
511Haute Provence Obs. in Germany, 1 in MPEC 2019-J142 -- P/2017 S5
Q69Hazelbrook Obs., 2 in MPEC 2019-J142 -- C/2018 N2, 46P
240Herrenberg Obs. in Germany, 1 in MPEC 2019-J142 -- C/2019 F2
N501program code 1 via Himalayan Chandra Telescope, 4 in MPEC 2019-J142 -- 2019 G3, 2019 G2, C/2019 A5, C/2018 F1
D88Hiratsuka Obs. in Japan, 24 in MPEC 2019-J142 -- C/2018 Y1, C/2018 N2, C/2017 T2, C/2016 R2, C/2016 N6, C/2015 XY1, C/2015 O1, C/2014 B1, 373P, 369P, 361P, 243P, 240P, 239P, 171P, 164P, 159P, 123P, 64P, 60P, 48P, 46P, 38P, 21P
750Hobbs Obs. in Wisconsin, 8 in MPEC 2019-J142 -- C/2010 U3, 137P, 123P, 78P, 64P, 59P, 46P, 38P
C43Hoyerswerda Obs. in Germany, 6 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2018 Y1, 123P, 46P, 38P
221IAS Obs. Hakos in Namibia, 2 in MPEC 2019-J142 -- C/2016 M1, 46P
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2019-J142 -- C/2018 V1
L28ISON Castelgrande Obs., 1 in MPEC 2019-J142 -- C/2018 V1
U69"M. Suzuki in Japan via iTelescope Obs. Auberry in northern California, 3 in MPEC 2019-J142 -- C/2018 V1, 60P, 38P
U69#program code "#" (12) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2019-J142 -- C/2018 V1
U69$Marian Urbanik in Slovakia via iTelescope Obs. Auberry in northern California, 1 in MPEC 2019-J142 -- C/2018 V1
U69&program code "&" (15) via iTelescope Obs. Auberry in northern California, 2 in MPEC 2019-J142 -- C/2018 V1, C/2017 O1
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 17 in MPEC 2019-J142 -- C/2018 W2, P/2018 VN2, C/2018 B1, C/2018 A3, P/2017 TW13, P/2017 S8, P/2017 S5, C/2017 K4, C/2016 X1, C/2016 R2, C/2015 XY1, C/2015 X5, C/2015 O1, C/2010 U3, 375P, 374P, 369P
U69_program code "_" (29) via iTelescope Obs. Auberry in northern California, 10 in MPEC 2019-J142 -- C/2019 D1, C/2018 W2, C/2017 T1, C/2017 S3, C/2017 K2, 123P, 68P, 59P, 46P, 21P
U69`program code "`" (30) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2019-J142 -- C/2017 K2
U69{program code "{" (31) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2019-J142 -- C/2017 T1
H06iTelescope Obs. Mayhill in New Mexico, 10 in MPEC 2019-J142 -- C/2019 F1, C/2018 Y1, C/2018 W2, C/2018 V1, C/2018 A3, C/2017 K2, 123P, 60P, 46P, 41P
H06#M. Suzuki in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2019-J142 -- C/2018 Y1, C/2018 V1
H06%Ernesto Guido in Italy via iTelescope Obs. Mayhill in New Mexico, 3 in MPEC 2019-J142 -- C/2019 J1, C/2018 Y1, C/2018 V1
H06`Erik Bryssinck in Belgium via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2019-J142 -- P/2017 S8, 46P
H06jprogram code "j" via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2019-J142 -- C/2018 V1, C/2017 T2
H06lprogram code "l" via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-J142 -- C/2017 K2
H06nprogram code "n" via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2019-J142 -- 123P, 60P
H06{program code "{" (31) via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-J142 -- C/2018 V1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 85 in MPEC 2019-J142 -- P/2019 G1, C/2019 F1, C/2019 D1, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A3, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X3, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, P/2018 V5, C/2018 V2, C/2018 V1, C/2018 U1, C/2018 R3, P/2018 P4, P/2018 P3, C/2018 O1, P/2018 L4, C/2018 L2, C/2018 F1, C/2018 EN4, C/2018 EF9, C/2018 E1, C/2018 C2, P/2018 C1, C/2017 Y1, P/2017 TW13, C/2017 S3, C/2017 K6, C/2017 K4, C/2017 K2, C/2017 E3, C/2017 D3, C/2017 AB5, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 M1, C/2015 O1, C/2015 D3, C/2014 R3, C/2014 OE4, C/2014 B1, 374P, 373P, 370P, 368P, 364P, 363P, 357P, 298P, 250P, 247P, 246P, 240P, 239P, 232P, 223P, 209P, 185P, 164P, 159P, 149P, 137P, 130P, 123P, 117P, 78P, 69P, 65P, 64P, 59P, 49P, 48P, 47P, 38P, 31P, 29P, 10P
I89(T. Prystavski via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-J142 -- 46P
I89/program code "/" (24) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2019-J142 -- C/2010 S1
I892program code 2 via iTelescope Obs. Nerpio in Spain, 4 in MPEC 2019-J142 -- 64P, 60P, 46P, 38P
I894M. Suzuki in Japan via iTelescope Obs. Nerpio in Spain, 3 in MPEC 2019-J142 -- C/2018 Y1, 46P, 38P
I896program code 6 via iTelescope Obs. Nerpio in Spain, 4 in MPEC 2019-J142 -- C/2016 A1, 369P, 231P, 171P
I89{program code "{" (31) via iTelescope Obs. Nerpio in Spain, 2 in MPEC 2019-J142 -- C/2016 R2, 64P
Q62iTelescope Obs. Siding Spring in New South Wales, 10 in MPEC 2019-J142 -- C/2019 J1, C/2019 E3, C/2018 Y1, C/2018 N2, C/2017 T2, C/2017 O1, C/2017 M4, C/2016 N6, C/2016 M1, 46P
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 82 in MPEC 2019-J142 -- C/2019 J1, C/2019 H1, P/2019 GG21, 2019 G4, 2019 G3, 2019 G2, C/2019 E3, P/2019 E2, P/2019 E1, P/2019 D2, C/2019 D1, 2019 C1, C/2019 B3, P/2019 A8, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, P/2019 A1, C/2018 Y1, C/2018 X3, P/2018 X1, P/2018 VN2, C/2018 V4, 2018 V3, C/2018 V2, P/2018 P3, C/2018 N2, C/2018 L2, P/2018 L1, C/2018 KJ3, C/2018 K1, C/2018 F4, C/2018 E2, C/2018 C2, C/2018 A6, 2017 U7, C/2017 U5, C/2017 T2, C/2017 M4, C/2017 K1, C/2017 B3, C/2016 X1, C/2016 N6, C/2016 M1, C/2016 C1, C/2015 XY1, C/2015 VL62, C/2015 V2, C/2015 V1, C/2014 B1, C/2011 KP36, C/2006 S3, 371P, 364P, 361P, 313P, 300P, 260P, 243P, 239P, 231P, 222P, 183P, 173P, 172P, 171P, 162P, 139P, 137P, 129P, 125P, 105P, 74P, 69P, 68P, 60P, 46P, 37P, 28P, 21P, 14P
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 3 in MPEC 2019-J142 -- C/2019 J1, C/2019 F2, 2017 U7
Q623Rolando Ligustri in Italy via iTelescope Obs. Siding Spring in New South Wales, 3 in MPEC 2019-J142 -- C/2019 D1, C/2018 Y1, 46P
Q625Cristovao Jacques in Brazil via iTelescope Obs. Siding Spring in New South Wales, 2 in MPEC 2019-J142 -- C/2019 D1, C/2018 A6
Q626Erik Bryssinck in Belgium via iTelescope Obs. Siding Spring in New South Wales, 2 in MPEC 2019-J142 -- P/2017 S8, 46P
Q62?B. Lutkenhoner in Germany via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-J142 -- C/2018 Y1
Q62Xprogram code "X" via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-J142 -- C/2018 Y1
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-J142 -- C/2017 M4
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 3 in MPEC 2019-J142 -- C/2019 H1, C/2019 F1, 46P
Q62{Nirmal Paul in India via iTelescope Obs. Siding Spring in New South Wales, 2 in MPEC 2019-J142 -- C/2018 Y1, 46P
P93JAXA Space Tracking & Communications Center (JAXA STCC) in Japan, 11 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 D1, P/2019 A2, P/2018 Y2, C/2018 W2, P/2018 VN2, C/2018 V4, C/2018 V2, C/2018 U1, C/2018 B1
Q67JBL Obs., 11 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2018 Y1, C/2018 N2, C/2018 F4, C/2018 A6, 2017 U7, C/2017 T2, 73P, 46P, 29P
403Kani Obs. in Japan, 1 in MPEC 2019-J142 -- C/2018 Y1
K85Kelmis Obs., 3 in MPEC 2019-J142 -- C/2018 Y1, 46P, 21P
585Kiev Comet Station in Ukraine, 64 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, 2019 C1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V2, C/2018 V1, C/2018 R5, C/2018 R3, P/2018 P3, P/2018 L5, C/2018 L2, C/2018 KJ3, C/2018 K1, C/2018 EF9, C/2018 A3, C/2017 T2, P/2017 S8, C/2017 M5, C/2017 M4, C/2017 K4, C/2017 K2, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 O1, C/2010 U3, 369P, 368P, 364P, 361P, 243P, 240P, 232P, 223P, 171P, 164P, 159P, 149P, 137P, 131P, 130P, 123P, 78P, 74P, 66P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P
186Kitab Obs., 9 in MPECs 2019-J141 & 2019-J142 -- 2019 JB1, 2019 HC, 2019 FP2, 2018 XG5, C/2018 W2, C/2018 A6, C/2017 T2, 60P, 46P
695>program code ">" (39) via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2019-J142 -- C/2010 U3
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2019-J142 -- C/2019 H1, C/2019 A9, P/2019 A8, C/2018 V4, 2018 V3
246KLENOT in the Czech Republic, 6 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, C/2018 W1, C/2018 V2, P/2017 TW13
L12Koksijde Obs., 6 in MPEC 2019-J142 -- C/2018 Y1, C/2018 V1, 64P, 60P, 46P, 38P
D95Kurihara Obs. in Japan, 45 in MPEC 2019-J142 -- C/2018 Y1, C/2018 W2, C/2018 V1, C/2018 R3, C/2018 L2, C/2018 A6, C/2018 A3, C/2017 T2, C/2017 K4, C/2016 R2, C/2016 N6, C/2016 N4, C/2015 O1, C/2011 KP36, C/2010 U3, 375P, 373P, 371P, 369P, 368P, 364P, 361P, 240P, 239P, 223P, 171P, 164P, 159P, 139P, 137P, 131P, 123P, 78P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P
J31La Axarquia Obs. in Spain, 4 in MPEC 2019-J142 -- C/2017 T2, 123P, 59P, 38P
212La Dehesilla Obs. in Spain, 12 in MPEC 2019-J142 -- C/2018 L2, C/2017 T2, C/2011 KP36, 369P, 171P, 159P, 137P, 78P, 64P, 46P, 38P, 29P
J67La Puebla de Vallbona Obs. in Spain, 1 in MPEC 2019-J142 -- C/2017 K2
809La Silla in Chile, 1 in MPEC 2019-J142 -- 46P
J38La Vara Obs. in Spain, 7 in MPEC 2019-J142 -- C/2018 Y1, 123P, 64P, 59P, 46P, 38P, 21P
304Las Campanas Obs. in Chile, 1 in MPEC 2019-J142 -- P/2019 A4
W85LCO Cerro Tololo A in Chile, 4 in MPEC 2019-J142 -- C/2019 F2, C/2019 B3, P/2019 A2, 46P
W79LCO Cerro Tololo Aqawan B#1 in Chile, 1 in MPEC 2019-J142 -- 46P
W86LCO Cerro Tololo B in Chile, 2 in MPEC 2019-J142 -- C/2019 E3, C/2019 D1
W87LCO Cerro Tololo C in Chile, 4 in MPEC 2019-J142 -- C/2019 E3, 2019 C1, P/2019 A2, 46P
T03LCO Haleakala Clamshell#3 in Hawaii, 3 in MPEC 2019-J142 -- C/2018 Y1, P/2017 S5, 46P
T04LCO Haleakala OGG B#2 in Hawaii, 2 in MPEC 2019-J142 -- 243P, 46P
V38LCO McDonald Obs. Aqawan A#1 in Texas, 1 in MPEC 2019-J142 -- 46P
Q64LCO Siding Spring B in New South Wales, 2 in MPEC 2019-J142 -- C/2019 F2, 2017 U7
Q58LCO Siding Spring Clamshell#1 in New South Wales, 1 in MPEC 2019-J142 -- 46P
Q59LCO Siding Spring Clamshell#2 in New South Wales, 1 in MPEC 2019-J142 -- C/2018 A3
L09LCO Sutherland Aqawan A#1 in South Africa, 1 in MPEC 2019-J142 -- 46P
K92LCO Sutherland B in South Africa, 1 in MPEC 2019-J142 -- C/2019 E3
Z21LCO Tenerife Aqawan A#1 in the Canary Islands, 1 in MPEC 2019-J142 -- 46P
Z17LCO Tenerife Aqawan A#2 in the Canary Islands, 1 in MPEC 2019-J142 -- C/2017 T2
K22Les Barres Obs. in France, 1 in MPEC 2019-J142 -- 38P
K08Lledoner Obs., 3 in MPEC 2019-J142 -- 78P, 64P, 46P
L30Lohbach Obs., 3 in MPEC 2019-J142 -- C/2018 Y1, 123P, 59P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2019-J142 -- 46P
688'program code "'" (16) via Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2019-J142 -- 46P
130Lumezzane Obs. in Italy, 7 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, 239P, 64P, 49P, 46P, 38P
K38M57 Obs. in Italy, 10 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, P/2019 A4, P/2019 A2, C/2018 X2, C/2018 W1, P/2017 TW13, P/2017 S8, 46P, 38P
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPEC 2019-J142 -- C/2018 X3, C/2018 W1, C/2018 U1, C/2018 B1, P/2017 TW13, 46P
C10Maisoncelles Obs. in France, 34 in MPEC 2019-J142 -- C/2019 D1, 2019 C1, C/2018 Y1, C/2018 V4, C/2018 V1, C/2018 R3, C/2018 L2, C/2018 A3, C/2017 T3, C/2017 T2, C/2017 K2, C/2016 R2, C/2016 N6, C/2015 O1, C/2014 B1, C/2010 U3, 373P, 368P, 361P, 240P, 228P, 171P, 164P, 159P, 149P, 123P, 64P, 60P, 59P, 46P, 38P, 31P, 29P, 21P
181Makes Obs. in France, 1 in MPEC 2019-J142 -- 2019 C1
232Masquefa Obs. in Spain, 8 in MPEC 2019-J142 -- C/2018 Y1, C/2017 T2, 240P, 123P, 64P, 60P, 46P, 38P
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2019-J142 -- C/2017 O1
W92MASTER OAFA Obs., 1 in MPEC 2019-J141 -- 1866
A06Mataro Obs. in Spain, 6 in MPEC 2019-J142 -- C/2018 Y1, 123P, 64P, 46P, 38P, 29P
568Mauna Kea in Hawaii, 1 in MPEC 2019-J142 -- P/2015 X6
568*Paul Wiegert on Mauna Kea in Hawaii, 1 in MPEC 2019-J142 -- 242P
568^R. Wainscoat on Mauna Kea in Hawaii, 15 in MPEC 2019-J142 -- P/2019 G1, C/2019 B3, C/2019 A9, P/2019 A8, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, P/2019 A3, P/2019 A2, P/2019 A1, P/2018 Y2, C/2018 X3, C/2018 X2, 2018 V3
568_Marco Micheli on Mauna Kea in Hawaii, 19 in MPEC 2019-J142 -- 2019 C1, C/2019 B1, C/2019 A9, C/2019 A5, C/2018 W1, C/2018 V4, 2018 V3, C/2018 V2, C/2018 M1, C/2018 F4, C/2018 F1, C/2017 Y1, P/2017 S8, C/2017 P2, C/2017 O1, C/2017 F2, C/2010 U3, 213P, 123P
Z50Mazariegos Obs., 6 in MPEC 2019-J142 -- C/2018 X2, C/2017 T2, 123P, 64P, 46P, 38P
711McDonald Obs. in Texas, 12 in MPEC 2019-J142 -- P/2019 GG21, 2019 G2, C/2019 F2, C/2019 F1, P/2019 B2, C/2019 A9, P/2019 A8, P/2018 V5, C/2018 V4, C/2018 V2, C/2018 U1, C/2018 F1
K10Micro Palomar Obs., 2 in MPEC 2019-J142 -- C/2018 Y1, 49P
118Modra Obs. in Slovakia, 9 in MPEC 2019-J142 -- C/2019 J2, C/2019 H1, C/2019 F2, C/2019 F1, C/2019 B1, C/2018 X2, C/2018 U1, P/2017 S8, C/2011 KP36
152Moletai Obs. in Lithuania, 4 in MPEC 2019-J142 -- C/2018 Y1, 64P, 46P, 38P
J45Montana Cabreja Obs. in the Canary Islands, 4 in MPEC 2019-J142 -- C/2018 Y1, 46P, 38P, 21P
213Montcabre Obs. in Spain, 23 in MPEC 2019-J142 -- P/2019 G1, C/2019 B1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 R3, P/2018 P3, C/2018 L2, C/2018 A3, C/2017 T2, C/2017 M4, C/2017 K2, C/2016 R2, C/2016 N6, 123P, 64P, 60P, 59P, 49P, 46P, 38P, 29P
108Montelupo Obs. in Italy, 7 in MPEC 2019-J142 -- C/2019 F2, C/2018 Y1, 78P, 64P, 60P, 46P, 38P
900Moriyama Obs. in Japan, 4 in MPEC 2019-J142 -- C/2018 Y1, P/2017 S5, 60P, 46P
675Mount Palomar in southern California, 2 in MPEC 2019-J142 -- 300P, 209P
675>program code ">" (39) via Mount Palomar in southern California, 1 in MPEC 2019-J142 -- C/2012 Q1
474Mt. John Obs. in New Zealand, 13 in MPEC 2019-J142 -- C/2019 E3, 2019 C1, C/2019 B3, P/2019 A6, C/2018 Y1, P/2018 X1, C/2018 F4, C/2018 E2, C/2018 E1, C/2018 A6, C/2017 X1, 2017 U7, P/2017 TW13
G96Mt. Lemmon Survey (MLS) in Arizona, 109 in MPEC 2019-J142 -- C/2019 J1, P/2019 GG21, P/2019 G1, C/2019 F2, C/2019 F1, P/2019 E2, P/2019 D2, 2019 C1, P/2019 B2, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, P/2019 A2, P/2019 A1, P/2018 Y2, C/2018 Y1, C/2018 X3, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, P/2018 VN2, C/2018 V4, C/2018 V2, C/2018 U1, C/2018 R5, P/2018 P3, P/2018 L5, C/2018 F1, C/2018 E1, C/2018 C2, P/2018 C1, C/2018 B1, C/2018 A6, C/2018 A4, C/2018 A3, P/2017 TW13, C/2017 T2, P/2017 S8, C/2017 S7, C/2017 M5, C/2017 K6, C/2017 K4, C/2017 K1, C/2017 E3, C/2017 D3, C/2016 R2, C/2016 N4, C/2016 E1, P/2016 A3, C/2015 XY1, C/2015 H2, C/2011 KP36, 375P, 374P, 373P, 371P, 370P, 369P, 368P, 366P, 361P, 357P, 302P, 276P, 267P, 257P, 253P, 247P, 246P, 243P, 240P, 239P, 232P, 231P, 228P, 223P, 213P, 209P, 185P, 175P, 171P, 169P, 164P, 159P, 149P, 143P, 137P, 131P, 130P, 123P, 117P, 88P, 78P, 74P, 69P, 66P, 64P, 60P, 59P, 49P, 47P, 37P, 31P, 28P, 14P, 10P, 9P
K74Muensterschwarzach Obs. in Germany, 3 in MPEC 2019-J142 -- C/2018 Y1, C/2018 V1, 46P
628Mulheim-Ruhr Obs. in Germany, 20 in MPEC 2019-J142 -- C/2019 F1, C/2018 U1, C/2017 K2, C/2016 R2, C/2015 O1, C/2014 B1, 369P, 368P, 247P, 240P, 209P, 164P, 159P, 149P, 123P, 64P, 59P, 49P, 46P, 38P
D74Nakagawa Obs., 9 in MPEC 2019-J142 -- C/2019 B1, C/2018 Y1, C/2018 X2, C/2018 W2, P/2018 VN2, C/2018 V4, C/2018 V2, C/2018 V1, 369P
C82Nastro Verde Obs. in Italy, 3 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2018 V1
J47Nazaret Obs. in Spain, 1 in MPEC 2019-J142 -- C/2018 Y1
C53NEOSSat in Earth orbit, 3 in MPEC 2019-J142 -- C/2019 D1, 64P, 46P
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 3 in MPECs 2019-J141 & 2019-J142 -- 2019 HC, C/2018 Y1, 38P
C47Nonndorf Obs. in Austria, 22 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 B1, C/2019 A9, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 A3, C/2017 K2, C/2016 R2, C/2016 A1, C/2015 O1, 369P, 368P, 240P, 171P, 123P, 64P, 60P, 46P, 38P
423North Ryde Obs. in New South Wales, 5 in MPEC 2019-J142 -- C/2018 N2, C/2018 A6, C/2017 B3, 46P, 21P
Z80Northolt Branch Obs. in England, 19 in MPECs 2019-J141 & 2019-J142 -- 2019 JV2, 2019 JO2, 2019 JB1, 2019 HC, C/2019 F2, C/2019 F1, P/2018 Y2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2017 K2, C/2015 O1, C/2014 B1, 123P, 64P, 60P, 46P, 38P, 29P
Z48Northolt Branch Obs. 2 Shepherd's Bush in England, 1 in MPEC 2019-J142 -- 46P
Z73Nuevos Horizontes Obs. in Spain, 3 in MPEC 2019-J142 -- 64P, 46P, 38P
G34Oberfrauendorf Obs. in Germany, 2 in MPECs 2019-J141 & 2019-J142 -- 2019 HC, C/2018 Y1
C23Olmen Obs. in Belgium, 53 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, C/2019 B1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V1, C/2018 L2, C/2018 B1, C/2018 A3, C/2017 T2, C/2017 M4, C/2017 K4, C/2017 K2, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 O1, C/2015 M3, C/2014 OE4, C/2014 B1, C/2010 U3, 368P, 247P, 243P, 240P, 232P, 231P, 209P, 171P, 164P, 159P, 149P, 137P, 131P, 130P, 123P, 78P, 74P, 68P, 64P, 60P, 59P, 49P, 46P, 38P, 37P, 31P, 29P, 21P
L36Ondrejov BlueEye600 Telescope in the Czech Republic, 15 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A3, C/2017 M4, C/2016 N6, C/2015 O1, C/2015 F4, C/2013 US10, 137P, 123P, 78P, 64P, 46P, 38P, 29P, 21P
J43Oukaimeden Obs. in Morocco, 15 in MPEC 2019-J142 -- P/2019 A2, C/2016 A1, C/2015 XY1, C/2014 B1, 373P, 368P, 239P, 209P, 164P, 130P, 64P, 59P, 49P, 38P, 31P
I61Ourense Obs. in Spain, 1 in MPEC 2019-J142 -- 46P
F51Pan-STARRS 1 (PS1) in Hawaii, 100 in MPEC 2019-J142 -- P/2019 GG21, 2019 G4, 2019 G3, 2019 G2, P/2019 G1, C/2019 F1, C/2019 E3, P/2019 E2, P/2019 E1, P/2019 D2, C/2019 B3, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A8, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, P/2019 A3, P/2019 A1, C/2018 X3, P/2018 X1, C/2018 W1, P/2018 VN2, P/2018 V5, C/2018 V4, C/2018 M1, P/2018 H2, C/2018 F4, C/2018 F1, C/2018 E1, P/2018 C1, C/2018 B1, C/2018 A3, C/2018 A1, C/2017 U5, P/2017 U3, P/2017 TW13, P/2017 S8, P/2017 R1, P/2017 P1, C/2017 K4, C/2017 K2, C/2017 K1, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 X5, C/2015 O1, C/2015 ER61, C/2014 W10, C/2014 R3, C/2013 C2, P/2011 O2, C/2011 KP36, 375P, 373P, 370P, 368P, 357P, 276P, 264P, 257P, 250P, 247P, 246P, 243P, 240P, 239P, 231P, 209P, 185P, 171P, 169P, 164P, 162P, 159P, 143P, 139P, 130P, 123P, 117P, 103P, 88P, 74P, 69P, 64P, 60P, 59P, 49P, 47P, 46P, 38P, 31P, 28P, 21P, 14P, 10P, 9P
F52Pan-STARRS 2 (PS2) in Hawaii, 44 in MPEC 2019-J142 -- P/2019 A3, P/2019 A1, C/2018 X3, C/2018 W1, P/2018 VN2, C/2018 V4, 2018 V3, C/2018 V2, C/2018 R5, C/2018 R3, C/2018 B1, P/2017 TW13, C/2017 T2, C/2017 M5, C/2017 K4, C/2017 K1, C/2016 N4, C/2015 O1, C/2011 KP36, 375P, 374P, 373P, 371P, 370P, 368P, 247P, 246P, 243P, 239P, 231P, 209P, 171P, 169P, 164P, 149P, 137P, 131P, 130P, 66P, 59P, 46P, 38P, 14P, 9P
K63Pascoli Obs. in Italy, 11 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W1, C/2018 V2, C/2018 U1, P/2017 TW13, 64P, 46P
K19PASTIS Obs. in France, 1 in MPEC 2019-J142 -- 149P
B49Paus Obs. in Spain, 2 in MPEC 2019-J142 -- P/2018 Y2, C/2018 F1
323Perth Obs. in Western Australia, 13 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2018 Y1, C/2018 N2, 2017 U7, C/2016 N6, C/2016 M1, 78P, 60P, 48P, 46P, 38P, 21P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2019-J142 -- P/2019 A2, C/2018 Y1, 123P, 60P, 59P, 49P, 46P, 38P
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 7 in MPEC 2019-J142 -- C/2019 D1, C/2019 A9, P/2019 A4, P/2019 A3, C/2018 W1, C/2018 U1, P/2017 TW13
K81PMPHR Obs., 8 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A3, C/2017 T2, 171P, 64P, 46P, 38P, 29P
J53Posadas Obs. in Spain, 3 in MPEC 2019-J142 -- 64P, 46P, 29P
D29Purple Mtn. Obs. Xuyi Station in China, 42 in MPEC 2019-J142 -- P/2019 G1, C/2019 F1, P/2019 E2, P/2019 A2, P/2018 Y2, P/2018 P4, P/2018 P3, C/2018 B1, C/2018 A6, C/2017 T2, P/2017 S5, C/2017 M5, C/2017 K4, C/2016 R2, C/2015 XY1, C/2015 O1, C/2014 B1, P/2011 O2, C/2011 KP36, 375P, 374P, 373P, 368P, 357P, 243P, 239P, 231P, 223P, 173P, 171P, 149P, 137P, 78P, 74P, 65P, 64P, 60P, 59P, 49P, 46P, 38P, 31P
L18QOS Obs., 1 in MPEC 2019-J142 -- C/2015 O1
W25RMS Obs., 1 in MPEC 2019-J142 -- P/2017 S5
G39ROAD in Chile, 2 in MPEC 2019-J142 -- 73P, 46P
L04ROASTERR-1 in Romania, 11 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 D1, C/2018 Y1, C/2018 X2, C/2018 W1, C/2018 V1, P/2017 S5, 123P, 64P, 46P
K61Rokycany Obs. in the Czech Republic, 6 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, P/2019 B2, C/2018 W1, C/2018 B1
619Sabadell Obs. in Spain, 1 in MPEC 2019-J142 -- 46P
867Saji Obs. in Japan, 1 in MPEC 2019-J142 -- C/2018 V1
104San Marcello Pistoiese Obs. in Italy, 11 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, P/2019 A2, C/2018 V2, C/2018 U1, P/2017 TW13, P/2017 S8, 64P, 59P, 46P, 38P
233San Vito Obs. in Italy, 8 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A3, C/2017 T2, 171P, 78P, 64P, 46P, 29P
H36Sandlot Obs. in Kansas, 6 in MPEC 2019-J142 -- C/2019 F2, 2019 C1, C/2018 U1, C/2018 B1, C/2018 A3, P/2017 TW13
L11Sandvreten Obs., 1 in MPEC 2019-J142 -- C/2018 A3
B70Sant Celoni Obs. in Spain, 3 in MPEC 2019-J142 -- 123P, 64P, 38P
B74Santa Maria de Montmagastrell Obs. in Spain, 18 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1, 2019 C1, P/2019 B2, P/2019 A2, C/2018 Y1, C/2018 W1, C/2016 N6, 247P, 171P, 137P, 123P, 78P, 64P, 60P, 46P, 38P
C95SATINO-1 in France, 40 in MPECs 2019-J141 & 2019-J142 -- C/2019 J2, C/2019 J1, C/2019 H1, C/2019 F2, C/2019 F1, 2019 C1, C/2018 Y1, C/2018 X2, C/2018 W1, C/2018 U1, C/2018 L2, C/2018 A3, C/2017 T2, C/2016 N6, C/2016 A1, C/2014 B1, 2011 LH, 375P, 373P, 369P, 368P, 247P, 243P, 240P, 239P, 171P, 164P, 159P, 149P, 123P, 78P, 74P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 29P
K96Savelli Obs., 1 in MPEC 2019-J142 -- C/2018 V2
204Schiaparelli Obs. in Italy, 12 in MPEC 2019-J142 -- C/2019 F1, C/2019 A9, P/2019 A2, C/2018 Y1, C/2018 X3, C/2018 X2, C/2018 V1, C/2018 A3, P/2017 TW13, 64P, 46P, 38P
033Schwarzschild Obs. in Germany, 15 in MPEC 2019-J142 -- C/2019 H1, P/2019 GG21, 2019 G2, P/2019 G1, C/2019 F2, C/2019 F1, P/2019 B2, C/2019 A9, C/2018 X2, C/2018 V4, 2018 V3, C/2018 V2, C/2018 U1, C/2018 A3, C/2016 N6
K14Sencelles Obs. in Spain, 4 in MPEC 2019-J142 -- C/2018 Y1, 123P, 64P, 46P
Q11Shinshiro Obs., 85 in MPEC 2019-J142 -- C/2019 J1, C/2019 H1, P/2019 G1, C/2019 F2, C/2019 F1, P/2019 D2, C/2019 D1, 2019 C1, P/2019 B2, C/2019 B1, P/2019 A2, C/2018 Y1, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, C/2018 V4, C/2018 V1, C/2018 U1, C/2018 R3, P/2018 P3, C/2018 N2, C/2018 F4, C/2018 E1, C/2018 A3, P/2017 TW13, C/2017 T2, C/2017 M5, C/2017 M4, C/2017 K6, C/2017 K4, C/2017 K2, C/2017 E3, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 XY1, C/2015 O1, C/2014 R3, C/2014 OE4, C/2014 B1, C/2011 KP36, C/2010 U3, 375P, 374P, 373P, 370P, 369P, 368P, 361P, 300P, 247P, 246P, 243P, 240P, 239P, 231P, 223P, 209P, 171P, 164P, 159P, 149P, 139P, 137P, 131P, 130P, 123P, 78P, 74P, 68P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P
0948program code 8 via Simeis Obs. in Ukraine, 3 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 A9
G40Slooh.com Canary Islands Obs. in the Canary Islands, 5 in MPEC 2019-J142 -- C/2018 Y1, 368P, 239P, 209P, 171P
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 4 in MPEC 2019-J142 -- C/2019 D1, 2019 C1, P/2019 B2, C/2017 O1
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 6 in MPEC 2019-J142 -- P/2019 A2, C/2018 W2, P/2017 TW13, P/2017 S8, P/2017 S5, 246P
G40'W.F. Cashwell in Nevada via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2019-J142 -- C/2010 U3, 46P
G40(program code "(" (17) via Slooh.com Canary Islands Obs. in the Canary Islands, 5 in MPEC 2019-J142 -- C/2018 V4, C/2018 V2, C/2018 V1, C/2018 U1, C/2018 A3
G40*program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 3 in MPEC 2019-J142 -- C/2019 J2, C/2019 D1, 123P
G40+program code "+" (20) via Slooh.com Canary Islands Obs. in the Canary Islands, 12 in MPEC 2019-J142 -- P/2018 P3, C/2018 A3, C/2017 T2, C/2016 N6, C/2016 A1, C/2014 OE4, C/2011 KP36, 368P, 171P, 123P, 48P, 38P
G40,program code "," (21) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-J142 -- 68P
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 10 in MPEC 2019-J142 -- C/2019 D1, C/2018 Y1, C/2018 W2, C/2018 A6, C/2017 T2, 123P, 60P, 46P, 38P, 29P
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2019-J141 & 2019-J142 -- 2019 JV2, 60P
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 71 in MPEC 2019-J142 -- C/2019 J2, C/2019 J1, C/2019 H1, P/2019 GG21, P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, 2019 C1, P/2019 B2, C/2019 A9, P/2019 A7, P/2019 A6, P/2019 A4, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X2, P/2018 X1, C/2018 W2, C/2018 W1, C/2018 V4, C/2018 V2, C/2018 V1, C/2018 U1, C/2018 R3, P/2018 P3, C/2018 L2, C/2018 F1, C/2018 A3, P/2017 TW13, C/2017 T2, P/2017 S8, C/2017 S7, P/2017 S5, C/2017 M4, C/2017 K2, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 O1, C/2014 B1, 375P, 374P, 373P, 369P, 361P, 247P, 246P, 243P, 232P, 231P, 209P, 171P, 164P, 159P, 149P, 137P, 123P, 78P, 68P, 64P, 59P, 49P, 48P, 46P, 38P, 31P, 21P
W88Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-J142 -- C/2018 Y1
W88!W.F. Cashwell in Nevada via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-J142 -- 46P
W88#program code "#" (12) via Slooh.com Chile Obs. in Chile, 2 in MPEC 2019-J142 -- C/2018 Y1, 46P
W88$program code "$" (13) via Slooh.com Chile Obs. in Chile, 10 in MPEC 2019-J142 -- C/2018 Y1, P/2018 P3, C/2018 N2, 2017 U7, C/2017 B3, C/2016 M1, C/2015 V2, C/2015 V1, 60P, 48P
W88%program code "%" (14) via Slooh.com Chile Obs. in Chile, 6 in MPEC 2019-J142 -- C/2018 Y1, C/2018 N2, 78P, 60P, 46P, 29P
W88&program code "&" (15) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-J142 -- 29P
W88'program code "'" (16) via Slooh.com Chile Obs. in Chile, 3 in MPEC 2019-J142 -- C/2017 K6, C/2016 M1, 60P
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 2 in MPEC 2019-J142 -- C/2019 J1, C/2017 T2
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 22 in MPEC 2019-J142 -- C/2019 F2, C/2019 F1, C/2019 D1, P/2019 A2, C/2018 Y1, C/2018 V2, C/2018 N2, C/2018 F4, C/2018 E1, C/2018 A6, C/2017 T2, C/2017 B3, C/2016 N6, C/2016 M1, C/2015 V2, 300P, 243P, 137P, 60P, 46P, 38P, 21P
W889program code 9 via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-J142 -- 37P
Y00SONEAR in Brazil, 3 in MPEC 2019-J142 -- C/2018 Y1, C/2018 E2, C/2018 E1
587Sormano Obs. in Italy, 7 in MPEC 2019-J142 -- C/2019 F1, 2019 C1, P/2019 B2, P/2019 A2, C/2018 W1, C/2018 V2, 46P
L06Sormano2 Obs. in Italy, 11 in MPEC 2019-J142 -- C/2019 J2, C/2019 H1, C/2019 F2, C/2019 D1, P/2019 B2, P/2019 A2, C/2018 W2, C/2018 W1, C/2018 V1, 60P, 38P
Q21Southern Utsunomiya in Japan, 24 in MPEC 2019-J142 -- P/2019 G1, P/2019 A2, C/2018 Y1, C/2018 V4, C/2018 E1, P/2017 TW13, C/2017 T2, C/2017 M4, C/2017 K4, C/2016 N6, 239P, 173P, 171P, 164P, 123P, 68P, 64P, 60P, 59P, 49P, 46P, 38P, 29P, 21P
691Spacewatch 0.9m telescope in Arizona, 29 in MPECs 2019-J141 & 2019-J142 -- 2019 JY4, 2019 JN2, 2019 HX3, C/2019 H1, P/2019 GG21, 2019 G2, P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, 2018 YU, C/2018 X3, C/2018 V4, 2018 V3, C/2018 V2, P/2018 C1, C/2018 A3, P/2017 TW13, P/2017 S8, 2016 KA1, 2014 HO4, 2012 CP2, C/2010 U3, 243P, 14P
291Spacewatch 1.8m telescope in Arizona, 19 in MPECs 2019-J141 & 2019-J142 -- 2019 JO5, 2019 JG1, 2019 HN, 2019 HK4, 2019 GD3, 2019 G3, C/2019 F2, C/2019 D1, C/2019 A9, P/2019 A8, P/2019 A6, C/2018 V4, 2018 V3, C/2018 V2, C/2018 U1, P/2018 C1, P/2017 S8, P/2011 O2, 2000 GV127
V78Spirit Marsh Obs. in Minnesota, 1 in MPEC 2019-J142 -- 46P
W34Squirrel Valley Obs. in North Carolina, 4 in MPEC 2019-J142 -- C/2018 Y1, C/2015 O1, 64P, 46P
I93St. Pardon de Conques Obs. in France, 3 in MPEC 2019-J142 -- P/2019 G1, C/2019 F2, C/2019 F1
K21St. Saturnin les Avignon Obs. in France, 2 in MPEC 2019-J142 -- 64P, 46P
C36Starry Wanderer Obs. in Belarus, 9 in MPEC 2019-J142 -- C/2018 R3, C/2016 R2, C/2014 B1, 231P, 123P, 64P, 49P, 46P, 38P
I52Steward Obs. Mt. Lemmon Station in Arizona, 52 in MPECs 2019-J141 & 2019-J142 -- 2019 JY4, 2019 JX2, 2019 JV2, 2019 JU5, 2019 JQ5, 2019 JM5, 2019 JL3, 2019 JK5, 2019 JG6, 2019 JG3, 2019 JG1, 2019 JE6, 2019 JB1, C/2019 J1, C/2019 H1, 2019 GN21, P/2019 GG21, 2019 G2, P/2019 G1, C/2019 F2, C/2019 F1, 2019 EQ1, C/2019 D1, 2019 C1, P/2019 B2, C/2019 B1, 2019 AP3, C/2019 A9, P/2019 A8, P/2019 A7, P/2019 A6, C/2019 A5, P/2019 A4, P/2019 A2, 2018 XH, C/2018 X2, C/2018 W1, P/2018 VN2, C/2018 V4, 2018 V3, C/2018 V2, C/2018 U1, C/2018 F1, P/2018 C1, C/2018 B1, P/2017 W3, C/2017 W2, C/2017 U4, P/2017 TW13, P/2017 S8, P/2017 S5, 276P
A71Stixendorf Obs. in Austria, 44 in MPEC 2019-J142 -- P/2019 GG21, P/2019 G1, C/2019 F2, C/2019 F1, P/2019 B2, C/2019 B1, C/2019 A9, P/2019 A7, P/2019 A4, P/2019 A2, P/2018 Y2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 W1, C/2018 V1, C/2018 E1, P/2017 TW13, C/2017 T2, P/2017 S8, C/2016 R2, C/2016 A1, C/2014 B1, 375P, 373P, 371P, 369P, 368P, 243P, 239P, 232P, 209P, 171P, 164P, 159P, 149P, 123P, 78P, 64P, 60P, 46P, 38P, 31P, 29P
Q23Sukagawa Obs., 9 in MPEC 2019-J142 -- C/2018 Y1, C/2018 V1, C/2016 N6, 64P, 60P, 59P, 46P, 38P, 21P
Q38Swan Hill Obs., 17 in MPEC 2019-J142 -- C/2019 F2, C/2018 Y1, C/2018 N2, C/2018 A6, C/2017 T2, C/2017 M4, C/2016 N6, C/2016 M1, 300P, 171P, 78P, 64P, 60P, 48P, 46P, 29P, 21P
461SZTE Asteroid Program in Hungary, 45 in MPEC 2019-J142 -- P/2019 GG21, C/2019 F1, P/2019 B2, P/2019 A7, C/2019 A5, P/2019 A4, P/2019 A2, P/2019 A1, C/2018 Y1, C/2018 X3, C/2018 X2, C/2018 W2, C/2018 W1, C/2018 V4, 2018 V3, C/2018 V2, C/2018 U1, C/2018 KJ3, C/2018 F1, C/2017 T2, C/2017 K2, C/2017 K1, C/2017 E3, C/2017 AB5, C/2016 X1, C/2016 E1, C/2016 A1, C/2015 XY1, C/2015 X5, C/2015 T2, C/2015 O1, C/2015 D3, C/2014 R3, C/2014 OE4, C/2014 B1, C/2010 U3, 243P, 209P, 159P, 64P, 46P, 38P, 31P, 21P, 10P
J22Tacande Obs. in the Canary Islands, 58 in MPEC 2019-J142 -- C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V4, C/2018 N2, C/2018 M1, C/2018 A6, C/2018 A3, C/2017 T2, P/2017 S5, C/2017 K6, C/2017 K4, C/2016 X1, C/2016 R2, C/2016 N6, C/2016 N4, C/2016 A1, C/2015 V1, C/2015 O1, C/2011 KP36, C/2010 U3, 374P, 373P, 371P, 370P, 369P, 368P, 364P, 361P, 247P, 240P, 239P, 232P, 223P, 209P, 175P, 171P, 164P, 159P, 137P, 131P, 130P, 123P, 78P, 74P, 66P, 65P, 64P, 60P, 59P, 49P, 48P, 46P, 38P, 37P, 31P, 29P, 21P
I81Tarbatness Obs. in Scotland, 50 in MPEC 2019-J142 -- C/2019 D1, C/2019 B1, P/2019 A2, C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 V1, C/2018 R3, C/2018 L2, C/2018 E1, C/2018 A3, C/2017 T2, C/2017 M4, C/2017 K4, C/2017 K2, C/2016 R2, C/2016 N6, C/2016 A1, C/2015 O1, C/2014 B1, C/2011 KP36, C/2010 U3, 369P, 368P, 247P, 243P, 240P, 232P, 223P, 209P, 171P, 164P, 159P, 149P, 137P, 131P, 130P, 123P, 78P, 74P, 66P, 64P, 60P, 59P, 49P, 46P, 38P, 37P, 31P, 29P
A98Taurus-1 Obs. in Belarus, 10 in MPEC 2019-J142 -- C/2018 Y1, C/2018 X2, C/2018 W2, C/2018 L2, C/2016 R2, C/2016 N4, 240P, 123P, 64P, 46P
954Teide Obs. in the Canary Islands, 2 in MPEC 2019-J142 -- C/2018 V1, C/2018 U1
926Tenagra II Obs. in Arizona, 4 in MPEC 2019-J142 -- C/2018 B1, C/2018 A3, C/2017 U4, P/2017 S8
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2019-J142 -- 137P
C35Terrassa Obs. in Spain, 16 in MPEC 2019-J142 -- P/2019 A2, C/2018 Y1, C/2018 L2, C/2018 A3, C/2017 T2, C/2016 A1, C/2015 O1, 171P, 123P, 78P, 64P, 60P, 59P, 46P, 38P, 29P
872Tokushima Obs. in Japan, 1 in MPEC 2019-J142 -- C/2018 Y1
W33Transit Dreams Obs., 7 in MPEC 2019-J142 -- C/2017 T2, 171P, 78P, 64P, 48P, 46P, 29P
A844program code 4 via TUBITAK Natl. Obs. in Turkey, 1 in MPEC 2019-J142 -- 46P
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPECs 2019-J141 & 2019-J142 -- 2019 JF1, 2019 JA1, 2019 HG3, 2018 XR, 46P
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2019-J142 -- P/2018 V5
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2019-J142 -- C/2018 Y1
Z55Uraniborg Obs., 17 in MPEC 2019-J142 -- C/2018 Y1, C/2018 A3, C/2017 T2, C/2017 K2, C/2016 R2, C/2016 N6, C/2015 O1, 240P, 198P, 171P, 123P, 78P, 64P, 60P, 59P, 46P, 38P
K17Valentines Obs., 1 in MPEC 2019-J142 -- 46P
K41Vegaquattro Obs. in Italy, 17 in MPEC 2019-J142 -- C/2019 F1, P/2019 B2, P/2019 A7, P/2019 A2, C/2018 V4, C/2018 KJ3, C/2016 R2, C/2016 N6, 368P, 171P, 164P, 149P, 123P, 64P, 60P, 59P, 49P
H47Vicksburg Obs. in Mississippi, 30 in MPEC 2019-J142 -- C/2019 F1, C/2019 D1, C/2018 Y1, P/2018 X1, C/2018 K1, C/2017 T2, C/2017 M4, C/2017 K2, C/2016 R2, C/2016 N6, C/2015 XY1, C/2015 O1, C/2014 B1, 369P, 368P, 243P, 171P, 149P, 123P, 78P, 74P, 68P, 64P, 60P, 59P, 49P, 46P, 38P, 29P, 21P
C90Vinyols Obs. in Spain, 5 in MPEC 2019-J142 -- 64P, 59P, 46P, 38P, 29P
L01Visnjan Obs., 29 in MPEC 2019-J142 -- C/2019 J2, C/2019 J1, C/2019 H1, P/2019 GG21, P/2019 G1, C/2019 F2, C/2019 F1, C/2019 D1, 2019 C1, P/2019 B2, C/2019 A9, P/2019 A7, P/2019 A6, P/2019 A4, P/2019 A3, P/2019 A2, P/2019 A1, P/2018 Y2, C/2018 X3, C/2018 X2, C/2018 W2, C/2018 W1, C/2018 V4, 2018 V3, C/2018 V2, C/2018 U1, C/2018 B1, C/2018 A3, C/2017 T2
I45W Crucis Obs. in Argentina, 3 in MPEC 2019-J142 -- C/2017 M4, C/2016 N6, C/2016 M1
Z92West Park Obs. in England, 2 in MPEC 2019-J142 -- C/2018 Y1, 46P
718Wiggins Obs. in Utah, 1 in MPEC 2019-J142 -- C/2019 F2
198Wildberg Obs. in Germany, 2 in MPEC 2019-J142 -- C/2018 W1, 149P
C51WISE in Earth polar orbit, 23 in MPEC 2019-J142 -- C/2019 H1, C/2019 B1, P/2018 P3, C/2018 N2, C/2018 F4, C/2018 A6, C/2018 A3, C/2016 R2, C/2016 N6, C/2015 O1, 240P, 239P, 209P, 171P, 164P, 137P, 123P, 60P, 49P, 48P, 46P, 38P, 21P
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2019-J142 -- C/2018 Y1, 123P, 46P, 38P
C42Xingming Obs. in China, 4 in MPEC 2019-J142 -- C/2019 J2, C/2019 J1, P/2019 A2, C/2018 V1
367Yatsuka Obs. in Japan, 26 in MPEC 2019-J142 -- C/2019 D1, C/2018 Y1, C/2018 W2, C/2018 V1, C/2018 R3, P/2018 P3, C/2018 N2, C/2018 L2, C/2018 A3, C/2017 T2, C/2017 M4, C/2016 R2, C/2016 N6, C/2015 O1, 243P, 240P, 171P, 123P, 78P, 68P, 64P, 60P, 48P, 46P, 38P, 29P
J08Zonalunar Obs. in Spain, 1 in MPEC 2019-J142 -- P/2017 S5
Z57Zuben Obs., 3 in MPEC 2019-J142 -- 137P, 78P, 64P
I41Zwicky Transient Facility (ZTF) in southern California, 19 in MPECs 2019-J141 & 2019-J142 -- C/2019 J2, C/2019 H1, C/2018 M1, P/2018 C1, C/2018 B1, C/2018 A6, C/2015 D3, 2013 KJ6, 2011 HP, 441825, 267759, 173561, 137170, 375P, 247P, 246P, 159P, 74P, 49P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 May '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2019 JO5JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1552 UTC today
NEODyS1700R E M O V E D-

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 15 May '19

Times are UTC for when items were noted or added by The Tracking News.

2215Generated Traffic Report
1700Noted that JPL Sentry has removed 2019 JO5 as an impact risk - see above
Noted that NEODyS has removed 2019 JO5 as an impact risk - see above
Grabbed MPEC 2019-J141 - Daily Orbit Update - see above
Grabbed MPEC 2019-J142 - Observations and Orbits of Comets - see above