Contents  on 15 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 15 January '19

Sixteen objects reported inside ten LD

There are sixteen planetoids reported inside ten lunar distances (LD) of our planet today. Nearest are risk-listed 2019 AU6, heading out from 2.91 to 4.23 LD, and risk-listed 2019 AG7, which comes its closest to Earth this time around -- 3.92 LD.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 2.41, 5.0 & 10.0 LD boundaries
Earth passage I D ~Size Distance today  Inside ten LD Notes
2.56 LD yesterday 2019 AU6 16 m  2.91 to 4.23 LD Jan. 9 - 19 NHATS target, risk
2.99 LD Jan. 10 2019 AD 10 m  6.50 to 7.63 LD Jan. 2 - 18 NHATS target
3.46 LD Jan. 7 2019 AR7 15 m  7.65 to 8.49 LD Dec. 28 - Jan. 17 NHATS target - DOU
3.92 LD today 2019 AG7 29 m  3.92 LD Jan. 9 - 22 NHATS target, Earth closest at 2241 UTC, risk - DOU
4.13 LD Jan. 12 2019 AC9 24 m  6.43 to 8.29 LD Jan. 8 - 16
4.87 LD Jan. 12 2019 AK3 13 m  7.33 to 9.26 LD Jan. 9 - 16
5.60 LD Jan. 12 2018 YU2 18 m  6.29 to 6.81 LD Jan. 4 - 20 NHATS target
6.95 LD Jan. 23 2019 AS11 15 m  9.75 from 10.46 LD today - Jan. 30 NEW, enters ten LD - MPEC
7.45 LD Jan. 19 2019 AB5 27 m  9.51 from 10.50 LD today - Jan. 24 enters ten LD - DOU
7.47 LD Jan. 10 2018 YQ2 20 m  9.81 to 10.69 LD Jan. 4 - 15 NHATS target, exits ten LD, risk
7.60 LD Jan. 13 2019 AR2 47 m  7.76 to 8.05 LD Jan. 7 - 19 NHATS target - DOU
7.64 LD tomorrow 2019 AU9 15 m  7.65 from 7.80 LD Jan. 10 - 22 NHATS target - DOU
7.76 LD Jan. 10 2013 YM2 22 m  9.09 to 9.63 LD Jan. 3 - 16 NHATS target
8.08 LD today 2019 AT6 10 m  8.08 LD Jan. 10 - 20 NHATS target, Earth closest at 0319 UTC
8.62 LD today 2019 AM8 14 m  8.62 LD Jan. 13 - 17 NHATS target, Earth closest at 1602 UTC
9.69 LD tomorrow 2019 AR8 26 m  9.84 from 10.37 LD today - Jan. 18 NHATS target, enters ten LD

This report was generated at 2050 UTC with the discoveries of approaching risk-listed 2019 AG11 (MPEC) and inbound 2019 AS11 (MPEC), and with follow-up in today's DOU MPEC for five objects in the above active traffic table and for four departed objects: 2019 AU, 2018 YK2, 2018 UC2, and risk-listed intruder 2019 AW2, plus, from November, the recovery of distant 136617 1994 CC and observation of 2018 UB3.

Approaching - sorted by 10-LD bubble entry date
8.7   LD Jan. 25* 2019 AG11 19 m  18.4 from 20.0 LD Jan. 22 - 28 NEW, EPU +/- 11 mins.*, risk - MPEC
5.6   LD Jan. 26* 2019 AA10 26 m  23.6 from 25.7 LD Jan. 22 - 30 EPU +/- 8.72 hours*
* EPU = Earth passage uncertainty



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 January '19

The MPC's NEO Confirmation Page has 97 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 97 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 136 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 January '19

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 25 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2019-A259 - "16:57 UT" - 2019 AV11


MPEC 2019-A258 - "16:52 UT" - 2019 AX11


MPEC 2019-A257 - "16:48 UT" - 2019 AW11


MPEC 2019-A256 - "16:44 UT" - 2019 AU11


MPEC 2019-A255 - "16:40 UT" - 2019 AT11


MPEC 2019-A254 - "16:35 UT" - 2019 AS11


MPEC 2019-A253 - "16:29 UT" - 2019 AR11


MPEC 2019-A252 - "16:23 UT" - 2019 AQ11


MPEC 2019-A251 - "16:18 UT" - 2019 AP11


MPEC 2019-A250 - "16:13 UT" - 2019 AO11


MPEC 2019-A249 - "16:08 UT" - 2019 AN11


MPEC 2019-A248 - "16:03 UT" - 2019 AM11


MPEC 2019-A247 - "15:58 UT" - 2019 AL11


MPEC 2019-A246 - "15:54 UT" - 2019 AK11


MPEC 2019-A245 - "15:50 UT" - 2019 AJ11


MPEC 2019-A244 - "15:46 UT" - 2019 AH11


MPEC 2019-A243 - "15:41 UT" - 2019 AG11


MPEC 2019-A242 - "15:36 UT" - 2019 AF11


MPEC 2019-A241 - "15:31 UT" - 2019 AE11


MPEC 2019-A240 - "15:26 UT" - 2019 AD11


MPEC 2019-A239 - "15:21 UT" - 2019 AC11


MPEC 2019-A238 - "15:15 UT" - 2019 AB11


MPEC 2019-A237 - "14:48 UT" - 2019 AB7


<< DOU on 15 Jan. '19 >>  MPEC 2019-A236 - "13:06 UT" - Daily Orbit Update


MPEC 2019-A235 - "11:44 UT" - 2012 CT

Observers  on 15 January '19

A total of 34 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2019-A236 -- 3200
E23Arcadia Obs. in New South Wales, 1 in MPEC 2019-A240 -- 2019 AD11
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2019-A236, 2019-A238 & 2019-A241 -- 2019 AE11, 2019 AB11, 2018 VQ1, 2018 UB3, 2018 TQ1, 2018 ME5, 2016 HM2, 2014 YC, 2014 CF14, 2013 OM2, 2009 CR2, 2009 BJ58, 2007 VG, 2004 BY21, 523812, 523599, 514914, 283457, 175189, 159560, 136617, 8013, 3671
T05ATLAS Haleakala in Hawaii, 8 in MPEC 2019-A236 -- 2019 AO7, 2009 SV17, 54660, 523811, 454177, 450779, 4953, 2340
T08ATLAS Mauna Loa in Hawaii, 44 in MPEC 2019-A236 -- 2019 AR2, 2019 AD5, 2019 AA9, 2009 SV17, 2007 NL1, 2002 VE68, 2001 VC2, 99799, 88263, 68950, 523610, 523587, 518735, 518463, 468481, 455550, 442742, 427643, 418929, 414903, 37336, 31345, 25916, 250162, 217807, 21277, 18736, 18109, 17274, 154656, 138852, 137032, 12538, 6456, 5751, 5143, 5131, 4953, 4401, 2061, 1916, 1865, 1627, 719
160Castelmartini Obs. in Italy, 12 in MPEC 2019-A236 -- 2012 MM11, 2003 NW1, 523604, 523587, 18736, 163051, 141053, 138937, 137084, 6178, 2061, 1943
703Catalina Sky Survey (CSS) in Arizona, 35 in MPECs 2019-A236 & 2019-A252 -- 2019 AQ11, 2010 GT7, 2002 VE68, 2001 VC2, 88263, 54401, 523815, 523803, 523779, 518735, 518463, 455550, 442742, 414903, 397847, 31210, 250162, 244670, 217628, 21088, 208617, 18736, 18109, 17274, 170891, 163902, 163818, 155334, 12538, 7482, 7358, 5131, 4055, 3199, 1943
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2019-A240, 2019-A244, 2019-A245 & 2019-A253 -- 2019 AR11, 2019 AJ11, 2019 AH11, 2019 AD11
L29Drebach-South Obs., 1 in MPEC 2019-A240 -- 2019 AD11
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2019-A236 -- 2013 BC70
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2019-A240 -- 2019 AD11
J95Great Shefford Obs. in England, 3 in MPECs 2019-A240, 2019-A252 & 2019-A254 -- 2019 AS11, 2019 AQ11, 2019 AD11
511Haute Provence Obs. in Germany, 1 in MPEC 2019-A236 -- 2019 AG3
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2019-A236 -- 2019 AG7
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2019-A252 -- 2019 AQ11
K38M57 Obs. in Italy, 1 in MPEC 2019-A236 -- 2019 AR2
C94MASTER-II Tunka in Russia, 2 in MPEC 2019-A236 -- 308127, 6178
568^R. Wainscoat on Mauna Kea in Hawaii, 13 in MPECs 2019-A235, 2019-A239, 2019-A240, 2019-A241, 2019-A243, 2019-A249, 2019-A250, 2019-A251, 2019-A253, 2019-A254, 2019-A255, 2019-A256 & 2019-A259 -- 2019 AV11, 2019 AU11, 2019 AT11, 2019 AS11, 2019 AR11, 2019 AP11, 2019 AO11, 2019 AN11, 2019 AG11, 2019 AE11, 2019 AD11, 2019 AC11, 2012 CT
474Mt. John Obs. in New Zealand, 10 in MPECs 2019-A236, 2019-A240, 2019-A244 & 2019-A245 -- 2019 AV9, 2019 AR7, 2019 AM2, 2019 AL2, 2019 AJ11, 2019 AH11, 2019 AG7, 2019 AD11, 2019 AC3, 2019 AB5
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2019-A236, 2019-A245 & 2019-A252 -- 2019 AQ11, 2019 AJ11, 2016 TS55, 2015 VW1, 2011 XE, 2001 VC2, 96744, 523587, 518735, 518463, 454100, 427643, 422977, 37336, 202435, 136773
Z80Northolt Branch Obs. in England, 1 in MPEC 2019-A236 -- 2019 AG7
F51Pan-STARRS 1 (PS1) in Hawaii, 41 in MPECs 2019-A235, 2019-A236, 2019-A237, 2019-A238, 2019-A239, 2019-A240, 2019-A241, 2019-A242, 2019-A243, 2019-A244, 2019-A246, 2019-A247, 2019-A248, 2019-A249, 2019-A250, 2019-A251, 2019-A253, 2019-A254, 2019-A255, 2019-A256, 2019-A257, 2019-A258 & 2019-A259 -- 2019 AX11, 2019 AW11, 2019 AV6, 2019 AV11, 2019 AU11, 2019 AT9, 2019 AT4, 2019 AT11, 2019 AS11, 2019 AR11, 2019 AQ9, 2019 AP11, 2019 AO11, 2019 AN2, 2019 AN11, 2019 AM2, 2019 AM11, 2019 AL11, 2019 AK11, 2019 AH11, 2019 AH10, 2019 AG11, 2019 AF11, 2019 AE11, 2019 AD11, 2019 AC11, 2019 AB7, 2019 AB11, 2018 YV, 2018 YD3, 2018 XY2, 2018 XV, 2016 RH18, 2015 BR515, 2012 CT, 2008 SW11, 2004 XP14, 512234, 428223, 329390, 228502
F52Pan-STARRS 2 (PS2) in Hawaii, 18 in MPEC 2019-A236 -- 2018 JD5, 2014 XR6, 85804, 523788, 523665, 48603, 438429, 414903, 285638, 256412, 224926, 19764, 139622, 137925, 136635, 108519, 2340, 1862
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 3 in MPECs 2019-A242, 2019-A246 & 2019-A247 -- 2019 AL11, 2019 AK11, 2019 AF11
K61Rokycany Obs. in the Czech Republic, 2 in MPECs 2019-A240 & 2019-A252 -- 2019 AQ11, 2019 AD11
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2019-A252 -- 2019 AQ11
C95SATINO-1 in France, 1 in MPEC 2019-A236 -- 90403
204Schiaparelli Obs. in Italy, 3 in MPECs 2019-A240, 2019-A252 & 2019-A254 -- 2019 AS11, 2019 AQ11, 2019 AD11
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2019-A236, 2019-A241, 2019-A244 & 2019-A257 -- 2019 AW11, 2019 AL7, 2019 AH11, 2019 AE11, 2018 YZ2, 414903
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2019-A236, 2019-A238, 2019-A242, 2019-A245 & 2019-A247 -- 2019 AZ2, 2019 AW2, 2019 AP8, 2019 AO8, 2019 AL2, 2019 AL11, 2019 AJ11, 2019 AF11, 2019 AB11, 2018 XG5, 2018 VT3, 2016 OY2
I52Steward Obs. Mt. Lemmon Station in Arizona, 39 in MPECs 2019-A235, 2019-A236, 2019-A239, 2019-A240, 2019-A241, 2019-A242, 2019-A243, 2019-A244, 2019-A245, 2019-A246, 2019-A247, 2019-A248, 2019-A252, 2019-A254, 2019-A255 & 2019-A256 -- 2019 AZ8, 2019 AW7, 2019 AU9, 2019 AU11, 2019 AU, 2019 AT7, 2019 AT3, 2019 AT11, 2019 AS6, 2019 AS4, 2019 AS11, 2019 AR2, 2019 AQ8, 2019 AQ7, 2019 AQ11, 2019 AO8, 2019 AO7, 2019 AM6, 2019 AM11, 2019 AL11, 2019 AL10, 2019 AK7, 2019 AK11, 2019 AJ8, 2019 AJ11, 2019 AH11, 2019 AH10, 2019 AG11, 2019 AF11, 2019 AE11, 2019 AD11, 2019 AC11, 2018 YK2, 2018 YB3, 2018 XD2, 2018 WV2, 2018 TA3, 2012 CT, 523815
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2019-A236 -- 2018 VG3, 2018 UC2, 2018 GY4
L01Visnjan Obs., 11 in MPECs 2019-A240, 2019-A242, 2019-A243, 2019-A247, 2019-A248, 2019-A249, 2019-A250, 2019-A251, 2019-A252, 2019-A255 & 2019-A257 -- 2019 AW11, 2019 AT11, 2019 AQ11, 2019 AP11, 2019 AO11, 2019 AN11, 2019 AM11, 2019 AL11, 2019 AG11, 2019 AF11, 2019 AD11
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2019-A236 -- 480885
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 AP11JPL Sentry18012050-208325.25618e-08-7.64-7.640JPL: Computed at 09:35 today Pacific time based on 9 observations spanning 3.4245 days (2019-Jan-11.584 to 2019-Jan-15.008467). Diameter approximately 0.030 km. from weighted mean H=25.28.
2019 AG11JPL Sentry17102114-211415.313e-09-9.24-9.240JPL: Computed at 08:58 today Pacific time based on 13 observations spanning 3.9334 days (2019-Jan-11.30301 to 2019-Jan-15.23636). Diameter approximately 0.019 km. from weighted mean H=26.23.
2019 AZ8NEODyS1710210917.71e-11-10.82-10.820NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-01-09.379 to 2019-01-15.482."
2019 AO8JPL Sentry1710R E M O V E DJPL: Risk listing removed at 1557 UTC today
NEODyS1710206711.04e-10-10.23-10.230NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2019-01-09.368 to 2019-01-15.510."
2019 AG7NEODyS1710R E M O V E D-
JPL Sentry17102064-206413.973e-09-8.68-8.680JPL: Computed at 08:12 today Pacific time based on 75 observations spanning 14.389 days (2018-Dec-31.614374 to 2019-Jan-15.003275). Diameter approximately 0.028 km. from weighted mean H=25.38.
2019 AC3JPL Sentry17102091-211890.00028357759-5.00-5.010JPL: Computed at 07:45 today Pacific time based on 35 observations spanning 11.023 days (2019-Jan-03.58822 to 2019-Jan-14.611552). Diameter approximately 0.012 km. from weighted mean H=27.23.
NEODyS17102091-2118271.19e-04-5.41-5.6n/aNEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2019-01-03.589 to 2019-01-14.612."
2019 AW2JPL Sentry17102072-207223.2513e-06-5.58-5.690JPL: Computed at 07:41 today Pacific time based on 33 observations spanning 12.017 days (2019-Jan-03.47489 to 2019-Jan-15.49203). Diameter approximately 0.030 km. from weighted mean H=25.24.
NEODyS17102048-207642.86e-06-5.64-5.780NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2019-01-03.476 to 2019-01-15.493."
2018 XG5JPL Sentry17102083-208312.272e-09-6.40-6.400JPL: Computed at 07:38 today Pacific time based on 63 observations spanning 32.856 days (2018-Dec-13.39431 to 2019-Jan-15.24993). Diameter approximately 0.310 km. from weighted mean H=20.19.
NEODyS1710208318.71e-09-5.83-5.830NEODyS: "Based on 63 optical observations (of which 0 are rejected as outliers) from 2018-12-13.395 to 2019-01-15.251."

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 January '19

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

2050Generated Traffic Report
1801Noted that JPL Sentry has posted 2019 AP11 as an impact risk - see above
1710Noted 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 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 posted 2019 AG11 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 AG7 risk assessment - see above
Noted that NEODyS has removed 2019 AG7 as an impact risk - see above
Noted that JPL Sentry has removed 2019 AO8 as an impact risk - see above
Noted that NEODyS has updated its 2019 AO8 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
Noted that NEODyS has updated its 2019 AZ8 risk assessment - see above
Grabbed MPEC 2019-A235 - 2012 CT - see above
Grabbed MPEC 2019-A236 - Daily Orbit Update - see above
Grabbed MPEC 2019-A237 - 2019 AB7 - see above
Grabbed MPEC 2019-A238 - 2019 AB11 - see above
Grabbed MPEC 2019-A239 - 2019 AC11 - see above
Grabbed MPEC 2019-A240 - 2019 AD11 - see above
Grabbed MPEC 2019-A241 - 2019 AE11 - see above
Grabbed MPEC 2019-A242 - 2019 AF11 - see above
Grabbed MPEC 2019-A243 - 2019 AG11 - see above
Grabbed MPEC 2019-A244 - 2019 AH11 - see above
Grabbed MPEC 2019-A245 - 2019 AJ11 - see above
Grabbed MPEC 2019-A246 - 2019 AK11 - see above
Grabbed MPEC 2019-A247 - 2019 AL11 - see above
Grabbed MPEC 2019-A248 - 2019 AM11 - see above
Grabbed MPEC 2019-A249 - 2019 AN11 - see above
Grabbed MPEC 2019-A250 - 2019 AO11 - see above
Grabbed MPEC 2019-A251 - 2019 AP11 - see above
Grabbed MPEC 2019-A252 - 2019 AQ11 - see above
Grabbed MPEC 2019-A253 - 2019 AR11 - see above
Grabbed MPEC 2019-A254 - 2019 AS11 - see above
Grabbed MPEC 2019-A255 - 2019 AT11 - see above
Grabbed MPEC 2019-A256 - 2019 AU11 - see above
Grabbed MPEC 2019-A257 - 2019 AW11 - see above
Grabbed MPEC 2019-A258 - 2019 AX11 - see above
Grabbed MPEC 2019-A259 - 2019 AV11 - see above