Contents  on 8 January '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 8 January '19

Thirteen objects reported inside ten LD

Thirteen asteroids are reported traveling inside ten lunar distances (LD) of Earth today. The closest is 2019 AD, inbound from 4.22 to 3.45 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
0.51 LD Dec. 28 2018 YO2 4 m  9.41 to 10.29 LD Dec. 16 - today intruder, NHATS target, exits ten LD, risk
1.33 LD Jan. 5 2019 AH3 9 m  8.36 to 12.36 LD Jan. 3 - 8 exits ten LD, risk
1.43 LD Jan. 4 2019 AB 19 m  7.88 to 10.05 LD Dec. 30 - today Moon buzzer, exits ten LD, risk
2.03 LD Jan. 2 2019 AE3 12 m  9.81 to 11.67 LD Dec. 28 - today NHATS target, exits ten LD
2.99 LD Jan. 10 2019 AD 10 m  3.45 from 4.22 LD Jan. 2 - 18 NHATS target - DOU
5.60 LD Jan. 12 2018 YU2 17 m  6.47 from 7.04 LD Jan. 4 - 20 NHATS target
7.47 LD Jan. 10 2018 YQ2 20 m  7.58 from 7.89 LD Jan. 4 - 15 NHATS target, risk
7.61 LD Jan. 13 2019 AR2 47 m  9.11 from 9.74 LD yesterday - Jan. 19 NHATS target - DOU
7.76 LD Jan. 10 2013 YM2 19 m  7.82 from 8.01 LD Jan. 3 - 16 NHATS target
7.77 LD Jan. 5 2019 AU 16 m  7.92 to 8.09 LD Dec. 27 - Jan. 14 NHATS target
7.8   LD Jan. 6* 2018 XO4 30 m  7.9 to 8.0 LD Dec. 30 - Jan. 13 EPU +/- 17 mins.*, NHATS target
9.05 LD Jan. 5 2018 YR2 17 m  9.63 to 10.09 LD Jan. 1 - 8 NHATS target, exits ten LD
9.17 LD Jan. 4 2019 AX3 11 m  9.46 to 9.67 LD Dec. 30 - Jan. 10 NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 1945 UTC with the discoveries announced yesterday of approaching 2019 AB5 (MPEC) and today of departed 2019 AS3 (DOU), which slipped past us at 1.64 LD on January 2nd, and with follow-up in today's DOU MPEC for approaching 2019 AK3, inbound objects 2019 AR2 and 2019 AD, outbound risk-listed 2019 AX3, and departed objects 2018 YA1, risk-listed 2019 AQ2, and risk-listed intruders 2019 AW2 and 2018 YL2.

Approaching - sorted by 10-LD bubble entry date
4.87 LD Jan. 12 2019 AK3 13 m  10.15 from 12.32 LD tomorrow - Jan. 16 risk - DOU
7.5   LD Jan. 19* 2019 AB5 26 m  18.0 from 19.4 LD Jan. 15 - 24 EPU +/- 1.25 hours*



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. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 8 January '19

The MPC's NEO Confirmation Page has 85 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 85 objects listed. Of these, 43 were "one nighters." So far The Tracking News has counted a total of 101 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 8 January '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-A126 - "20:16 UT" - Comet P/2019 A2 (ATLAS)


MPEC 2019-A125 - "18:45 UT" - 2019 AQ5


MPEC 2019-A124 - "18:41 UT" - 2019 AO5


MPEC 2019-A123 - "18:36 UT" - 2019 AN5


MPEC 2019-A122 - "18:31 UT" - 2019 AM5


MPEC 2019-A121 - "18:21 UT" - 2016 AZ165


MPEC 2019-A120 - "16:30 UT" - 2007 HW4 = 2019 AE5


<< DOU on 8 Jan. '19 >>  MPEC 2019-A119 - "13:07 UT" - Daily Orbit Update


MPEC 2019-A118 - "11:03 UT" - 2014 KP84

Observers  on 8 January '19

A total of 47 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 2 in MPECs 2019-A119 & 2019-A126 -- P/2019 A2, 3200
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2019-A119, 2019-A122, 2019-A123 & 2019-A124 -- 2019 AY, 2019 AS3, 2019 AO5, 2019 AN5, 2019 AM5, 2019 AL, 2018 WP2, 2018 WH2, 2018 VE4, 2018 TS5, 2018 PJ22, 2013 BG27
T05ATLAS Haleakala in Hawaii, 6 in MPECs 2019-A119 & 2019-A126 -- 2019 AR2, P/2019 A2, 2018 WR1, 2018 VB9, 2018 UZ, 523811
T08ATLAS Mauna Loa in Hawaii, 8 in MPEC 2019-A119 -- 2019 AZ2, 2018 XT2, 2018 XB2, 2018 VZ9, 2018 TC3, 2010 AK, 2009 SV17, 2007 YU56
I47Auger Obs. in Argentina, 1 in MPEC 2019-A126 -- P/2019 A2
C77Bernezzo Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
W96Campo Catino Austral Obs. in Chile, 1 in MPEC 2019-A126 -- P/2019 A2
160Castelmartini Obs. in Italy, 12 in MPEC 2019-A119 -- 2018 WR1, 2018 TC3, 2011 OL5, 2007 YU56, 2004 XP14, 99799, 457260, 450238, 242147, 18109, 141498, 1943
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 5 in MPECs 2019-A119, 2019-A122, 2019-A123 & 2019-A124 -- 2019 AP2, 2019 AO5, 2019 AN5, 2019 AM5, 2018 YB
107Cavezzo Obs. in Italy, 2 in MPEC 2019-A119 -- 2018 XV, 523604
K51Celado Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2019-A121 & 2019-A124 -- 2019 AO5, 2016 AZ165
Z99Clixby Obs. in England, 1 in MPEC 2019-A126 -- P/2019 A2
Z45Cosmos Obs., 1 in MPEC 2019-A119 -- 163051
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPEC 2019-A119 -- 2019 AK3, 2018 YW2, 2018 XH
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2019-A119 & 2019-A126 -- 2019 AQ3, P/2019 A2
157Frasso Sabino Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
E89Geyserland Obs. in New Zealand, 1 in MPEC 2019-A119 -- 2007 YQ56
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2019-A126 -- P/2019 A2
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-A126 -- P/2019 A2
K38M57 Obs. in Italy, 2 in MPECs 2019-A119 & 2019-A126 -- 2019 AD5, P/2019 A2
568^R. Wainscoat on Mauna Kea in Hawaii, 5 in MPECs 2019-A119, 2019-A122, 2019-A123, 2019-A125 & 2019-A126 -- 2019 AQ5, 2019 AN5, 2019 AM5, P/2019 A2, 2016 AO131
108Montelupo Obs. in Italy, 1 in MPEC 2019-A119 -- 1943
L19MPC code L19, 1 in MPEC 2019-A126 -- P/2019 A2
474Mt. John Obs. in New Zealand, 7 in MPECs 2019-A119 & 2019-A125 -- 2019 AY3, 2019 AX3, 2019 AR2, 2019 AQ5, 2019 AO, 2019 AM2, 2018 XL5
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2019-A119 -- 2019 AS3, 2004 TX37
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2019-A126 -- P/2019 A2
I41Palomar Transient Factory (PTF) in southern California, 7 in MPEC 2019-A119 -- 2018 VZ9, 2014 XR6, 54401, 518463, 385268, 9058, 5143
F51Pan-STARRS 1 (PS1) in Hawaii, 28 in MPECs 2019-A119, 2019-A121, 2019-A122, 2019-A123, 2019-A124 & 2019-A125 -- 2019 AY4, 2019 AW4, 2019 AV4, 2019 AQ5, 2019 AO5, 2019 AN5, 2019 AM5, 2019 AM2, 2019 AL2, 2019 AF3, 2018 YZ, 2018 YB3, 2018 YA3, 2018 XY2, 2018 XK2, 2018 WN2, 2018 WM, 2018 WC1, 2018 PE22, 2016 AZ165, 2011 OL5, 2005 YY36, 2005 UF1, 2003 YW1, 2002 XC91, 459462, 454101, 2212
K63Pascoli Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
B49Paus Obs. in Spain, 1 in MPEC 2019-A119 -- 2019 AR2
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2019-A126 -- P/2019 A2
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2019-A119 & 2019-A126 -- 2019 AQ3, P/2019 A2
C95SATINO-1 in France, 1 in MPEC 2019-A119 -- 31210
Q11Shinshiro Obs., 1 in MPEC 2019-A126 -- P/2019 A2
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2019-A126 -- P/2019 A2
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2019-A126 -- P/2019 A2
587Sormano Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
L06Sormano2 Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2019-A119 -- 2019 AY4, 2019 AQ2, 2019 AE5, 2019 AC, 2018 YZ2, 2018 YA1, 2018 XX5, 2018 XV5, 2018 XL5, 2018 XF3, 2018 UY, 2004 TX37
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2019-A119 -- 2019 AW, 2019 AS, 2019 AC3, 2018 XG5
I52Steward Obs. Mt. Lemmon Station in Arizona, 27 in MPECs 2019-A119, 2019-A125 & 2019-A126 -- 2019 AZ2, 2019 AY3, 2019 AX4, 2019 AX3, 2019 AX2, 2019 AW2, 2019 AR2, 2019 AQ5, 2019 AQ2, 2019 AM2, 2019 AK3, 2019 AJ3, 2019 AF3, 2019 AD3, 2019 AD, P/2019 A2, 2018 YV2, 2018 YS, 2018 YJ2, 2018 YJ, 2018 YA3, 2018 XZ4, 2018 XN, 2018 XH, 2018 WR1, 2018 PL9, 2017 BQ93
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2019-A119 -- 2018 YL2, 2015 LB40
T09UH/Tholen NEO Follow-Up Subaru Telescope in Hawaii, 1 in MPEC 2019-A118 -- 2014 KP84
K41Vegaquattro Obs. in Italy, 1 in MPEC 2019-A126 -- P/2019 A2
L01Visnjan Obs., 2 in MPECs 2019-A125 & 2019-A126 -- 2019 AQ5, P/2019 A2
C51WISE in Earth polar orbit, 2 in MPEC 2019-A119 -- 2001 UU92, 3552
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 January '19

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 AK3JPL Sentry17002058-205812.355e-09-9.58-9.580JPL: Computed at 08:09 today Pacific time based on 21 observations spanning 4.0005 days (2019-Jan-04.47409 to 2019-Jan-08.47459). Diameter approximately 0.013 km. from weighted mean H=27.12.
NEODyS1700205821.42e-08-8.82-8.820NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-01-04.475 to 2019-01-08.475."
2019 AC3JPL Sentry17002084-2118240.0003161654936-4.97-5.020JPL: Computed at 08:15 today Pacific time based on 15 observations spanning 4.7958 days (2019-Jan-03.58822 to 2019-Jan-08.38405). Diameter approximately 0.012 km. from weighted mean H=27.24.
NEODyS17002091-2118271.57e-04-5.29-5.51-NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2019-01-03.589 to 2019-01-08.385."
2019 AW2JPL Sentry17002029-210851.30352e-06-5.92-6.220JPL: Computed at 08:09 today Pacific time based on 25 observations spanning 4.9450 days (2019-Jan-03.47489 to 2019-Jan-08.41986). Diameter approximately 0.031 km. from weighted mean H=25.22.
NEODyS17002029-2108101.34e-06-5.83-6.240NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2019-01-03.476 to 2019-01-08.421."
2019 AQ2JPL Sentry17002081-2118266.4291902e-06-5.93-6.430JPL: Computed at 08:31 today Pacific time based on 32 observations spanning 4.9495 days (2019-Jan-03.32957 to 2019-Jan-08.27906). Diameter approximately 0.026 km. from weighted mean H=25.60.
NEODyS17002073-2117502.97e-06-6.24-6.750NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2019-01-03.330 to 2019-01-08.280."
2018 YW2JPL Sentry17002050-208132.5759e-06-5.17-5.470JPL: Computed at 08:08 today Pacific time based on 33 observations spanning 7.6498 days (2018-Dec-31.52399 to 2019-Jan-08.173801). Diameter approximately 0.055 km. from weighted mean H=23.95.
NEODyS17002050-211699.0e-07-5.61-5.870NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2018-12-31.525 to 2019-01-08.175."
2018 YL2NEODyS1700R E M O V E D-
2018 XG5JPL Sentry17002083-208328.03459e-07-3.91-3.910JPL: Computed at 07:48 today Pacific time based on 45 observations spanning 25.698 days (2018-Dec-13.39431 to 2019-Jan-08.09199). Diameter approximately 0.290 km. from weighted mean H=20.31.
NEODyS1700208313.92e-07-4.23-4.230NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2019-01-08.093."
2014 HN198JPL Sentry17002021-2117972.45769e-08-7.66-8.530JPL: Computed at 16:21 April 6th of 2017 Pacific time based on 16 observations spanning .98769 days (2014-Apr-28.04889 to 2014-Apr-29.03658). Diameter approximately 0.024 km. from weighted mean H=25.71.

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 8 January '19

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

2116Grabbed MPEC 2019-A126 - Comet P/2019 A2 (ATLAS) - see above
1945Generated Traffic Report
1900Grabbed MPEC 2019-A123 - 2019 AN5 - see above
Grabbed MPEC 2019-A124 - 2019 AO5 - see above
Grabbed MPEC 2019-A125 - 2019 AQ5 - see above
1836Grabbed MPEC 2019-A121 - 2016 AZ165 - see above
Grabbed MPEC 2019-A122 - 2019 AM5 - see above
1700Noted that JPL Sentry has updated its 2014 HN198 risk assessment - see above
Noted that JPL Sentry has updated its 2018 XG5 risk assessment - see above
Noted that NEODyS has updated its 2018 XG5 risk assessment - see above
Noted that NEODyS has removed 2018 YL2 as an impact risk - see above
Noted that JPL Sentry has updated its 2018 YW2 risk assessment - see above
Noted that NEODyS has updated its 2018 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AC3 risk assessment - see above
Noted that NEODyS has updated its 2019 AC3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AK3 risk assessment - see above
Noted that NEODyS has updated its 2019 AK3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AQ2 risk assessment - see above
Noted that NEODyS has updated its 2019 AQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 AW2 risk assessment - see above
Noted that NEODyS has updated its 2019 AW2 risk assessment - see above
Grabbed MPEC 2019-A118 - 2014 KP84 - see above
Grabbed MPEC 2019-A119 - Daily Orbit Update - see above
Grabbed MPEC 2019-A120 - 2007 HW4 = 2019 AE5 - see above