Contents  on 6 January '20

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 6 January '20

Thirteen objects reported inside ten LD

There are thirteen small celestial objects reported to be within ten lunar distances (LD) of Earth today, all of them well beyond three 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
0.85 LD Jan. 2 2020 AP1 4 m  4.20 to 5.40 LD Dec. 25 - Jan. 10 intruder, NHATS target
2.08 LD Jan. 2 2020 AC1 7 m  4.72 to 6.00 LD Dec. 26 - Jan. 9 NHATS target, risk - DOU
2.5   LD Jan. 9* 2020 AT1 11 m  4.3 from 5.4 LD Jan. 2 - 16 EPU +/- 22 mins.*, NHATS target - DOU
2.57 LD Jan. 4 2020 AN1 23 m  5.22 to 7.65 LD Dec. 31 - tomorrow DOU
3.27 LD Jan. 4 2019 YB4 15 m  3.89 to 4.77 LD Dec. 28 - Jan. 11 NHATS target
3.37 LD Jan. 2 2020 AC 16 m  5.86 to 6.95 LD Dec. 26 - Jan. 9 NHATS target
3.71 LD Jan. 10 2019 YF4 14 m  4.31 from 4.67 LD Dec. 27 - Jan. 25 NHATS target
4.13 LD today 2020 AU1 17 m  4.13 LD Dec. 30 - Jan. 12 NEW, Earth closest at 0033 UTC - MPEC
4.76 LD today 2020 AW 6 m  4.76 LD Dec. 27 - Jan. 15 NHATS target, Earth closest at 0147 UTC, risk - DOU
4.8   LD Jan. 2* 2019 AE3 12 m  7.8 to 9.4 LD Dec. 28 - tomorrow EPU +/- 1.27 hours*, NHATS target
6.5   LD Jan. 13* 2020 AE1 11 m  9.0 from 9.7 LD yesterday - Jan. 21 EPU +/- 1.28 hours*, NHATS target
6.91 LD Jan. 8 2020 AR1 12 m  7.39 from 8.40 LD Jan. 4 - 11 risk - DOU
7.23 LD tomorrow 2020 AV1 21 m  7.28 from 8.07 LD Jan. 4 - 9 NEW - MPEC, DOU

This report was generated at 2211 UTC with the discoveries announced late yesterday of inbound 2020 AV1 (MPEC, DOU) and passing 2020 AU1 (MPEC), and four more announced early today: approaching objects 2020 AB2 (MPEC, DOU) and 2020 AZ1 (MPEC, DOU), and two departed objects: 2020 AA2 (MPEC, DOU), which passed our planet at about 4.3  on December 31st, and risk-listed 2020 AY1 (MPEC), which went by at about 8.2 LD on January 1st. Today's DOU MPEC has follow-up in the table below for three approaching objects and, in the above table, for two inbound, one passing, and two outbound objects. And the DOU has follow-up for ten departed objects: 2020 AB, 2019 YA3, 2019 YV1, 2019 YA1, 2019 YR, 2019 YL, 2019 XQ2, and including three risk-listed: 2020 AP, 2019 YP3, and 2019 YW2.

Approaching - sorted by 10-LD bubble entry date
3.8   LD Jan. 12* 2020 AB2 14 m  11.3 from 13.0 LD tomorrow - Jan. 18 NEW, EPU +/- 1.20 hours*, NHATS target - MPEC, DOU
6.33 LD Jan. 11 2019 WC5 103 m  13.95 from 16.61 LD Jan. 8 - 13 DOU
6.9   LD Jan. 16* 2019 YD3 21 m  12.3 from 13.2 LD Jan. 9 - 22 EPU +/- 5 mins.*, NHATS target
8.2   LD Jan. 16* 2020 AZ1 16 m  11.5 from 12.2 LD Jan. 9 - 22 NEW, EPU +/- 5 mins.*, NHATS target - MPEC, DOU
8.5   LD Jan. 12* 2020 AO1 63 m  24.7 from 28.5 LD Jan. 11 - 14 EPU +/- 7 mins.*, risk - DOU
9.09 LD Jan. 17 2020 AD1 18 m  14.44 from 15.29 LD Jan. 13 - 22 NHATS target - DOU
9.3   LD Jan. 14* 2020 AO 48 m  35.4 from 39.7 LD Jan. 13 - 15 EPU +/- 19 mins.*
* EPU = Earth passage uncertainty

Our new standalone page, "Earth's Busy Neighborhood," has more info about close-passing objects and has interactive traffic tables and faster updates.



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 6 January '20

The MPC's NEO Confirmation Page has 42 listings

When last checked at 2307 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 42 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 61 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 6 January '20

Minor Planet Electronic Circulars

As of last check at 2307 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-A85 - "22:48 UT" - 2011 UC292


MPEC 2020-A84 - "16:01 UT" - 2020 AF2


MPEC 2020-A83 - "15:49 UT" - 2020 AE2


MPEC 2020-A82 - "15:00 UT" - 2014 XQ3


<< DOU on 6 January '20 >>  MPEC 2020-A81 - "12:08 UT" - Daily Orbit Update


MPEC 2020-A80 - "02:10 UT" - 2020 AB2


MPEC 2020-A79 - "02:08 UT" - 2020 AA2


MPEC 2020-A78 - "02:06 UT" - 2020 AZ1


MPEC 2020-A77 - "00:03 UT" - 2020 AY1


MPEC 2020-A76 - "00:00 UT" - 2020 AX1

Observers  on 6 January '20

A total of 46 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2020-A76, 2020-A81 & 2020-A84 -- 2020 AX1, 2020 AF2, 2019 YT4, 2019 YR, 2019 YJ2, 2019 XM1, 2019 XJ2, 2019 XD3, 2019 WO4, 2019 US6, 2019 UN14, 2019 OG, 2019 OA3, 2015 AR45, 2011 CG2, 386281, 343158
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2020-A81 -- 2014 NF64
C77Bernezzo Obs. in Italy, 1 in MPEC 2020-A77 -- 2020 AY1
703Catalina Sky Survey (CSS) in Arizona, 26 in MPECs 2020-A77 & 2020-A81 -- 2020 AY1, 2019 XW2, 2019 XG1, 2019 BO1, 2017 NQ6, 2015 BC92, 2014 HM178, 2012 BD124, 2010 WF3, 2004 BT58, 89830, 85236, 539940, 52768, 483878, 437316, 418849, 250577, 238063, 214088, 163696, 162080, 162004, 141052, 137064, 136993
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPEC 2020-A81 -- 2017 KT4, 2013 EW108
734Farpoint Obs. in Kansas, 6 in MPEC 2020-A81 -- 2019 YA, 2019 XW2, 2019 VF6, 2019 UJ15, 2019 QV5, 2016 WE1
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2020-A76, 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AX1, 2019 OA3
K83Forti Obs., 6 in MPEC 2020-A81 -- 2020 AJ1, 2019 WC5, 2014 NF64, 214088, 163696, 137199
157Frasso Sabino Obs. in Italy, 1 in MPEC 2020-A81 -- 2013 AW52
203GiaGa Obs. in Italy, 4 in MPECs 2020-A76, 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AX1, 2020 AV1, 2019 OA3
K88GINOP-KHK in Hungary, 1 in MPEC 2020-A77 -- 2020 AY1
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2020-A81 -- 2020 AN1
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 7 in MPEC 2020-A81 -- 2019 YZ4, 2019 YV1, 2019 YA5, 2019 YA3, 2019 YA, 2019 XQ2, 2005 RK3
130Lumezzane Obs. in Italy, 12 in MPEC 2020-A81 -- 2019 UB11, 2019 SH1, 2017 RV, 2016 WE1, 2014 NF64, 2013 UV10, 2006 KY86, 418849, 264357, 153842, 138175, 106589
K38M57 Obs. in Italy, 2 in MPECs 2020-A77 & 2020-A81 -- 2020 AY1, 2019 OA3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2020-A76, 2020-A77, 2020-A79, 2020-A80 & 2020-A84 -- 2020 AY1, 2020 AX1, 2020 AF2, 2020 AB2, 2020 AA2
D54MASTER-II Blagoveshchensk in Russia, 2 in MPEC 2020-A81 -- 18172, 1866
118Modra Obs. in Slovakia, 3 in MPEC 2020-A81 -- 2019 XW2, 2019 UB11, 2015 HU116
V01Mountainville Obs. in Utah, 1 in MPEC 2020-A76 -- 2020 AX1
858MPC code 858, 1 in MPEC 2020-A81 -- 2020 AN1
474Mt. John Obs. in New Zealand, 1 in MPEC 2020-A83 -- 2020 AE2
G96Mt. Lemmon Survey (MLS) in Arizona, 46 in MPECs 2020-A76, 2020-A78, 2020-A79, 2020-A80, 2020-A81, 2020-A84 & 2020-A85 -- 2020 AZ1, 2020 AX1, 2020 AF2, 2020 AB2, 2020 AA2, 2019 YW2, 2019 YU3, 2019 YL, 2019 YD2, 2019 XL1, 2019 XC3, 2019 XA3, 2019 UB11, 2019 OA3, 2018 JE1, 2017 BU31, 2014 YU43, 2012 AB11, 2011 UC292, 2010 SD13, 2010 AE30, 2004 CH52, 85490, 529668, 512242, 503880, 484462, 482244, 409342, 385497, 382406, 374188, 36284, 34613, 331792, 276397, 25916, 204131, 199801, 177651, 159504, 138893, 137924, 137120, 10145, 1620
C47Nonndorf Obs. in Austria, 2 in MPECs 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AJ1
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2020-A83 & 2020-A85 -- 2020 AE2, 2011 UC292
F52Pan-STARRS 2 in Hawaii, 1 in MPEC 2020-A83 -- 2020 AE2
K63Pascoli Obs. in Italy, 5 in MPECs 2020-A76, 2020-A77, 2020-A79 & 2020-A81 -- 2020 AZ1, 2020 AY1, 2020 AX1, 2020 AA2, 2019 OA3
323Perth Obs. in Western Australia, 1 in MPEC 2020-A81 -- 2017 YH
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2020-A81 -- 2020 AJ1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2020-A81 -- 2020 AJ1, 2019 YM3, 2019 YK4, 2019 YD2, 2019 XW2, 2019 XG1, 2019 WC5, 2019 SH6, 2019 PR2, 2018 BP, 2014 NF64, 52768, 333555, 103067
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2020-A76, 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AX1, 2019 OA3
H36Sandlot Obs. in Kansas, 1 in MPEC 2020-A81 -- 2013 AS27
C95SATINO-1 in France, 3 in MPECs 2020-A76 & 2020-A81 -- 2020 AX1, 2019 OA3, 2012 TO139
204Schiaparelli Obs. in Italy, 3 in MPECs 2020-A76, 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AX1, 2019 OA3
033Schwarzschild Obs. in Germany, 1 in MPEC 2020-A76 -- 2020 AX1
587Sormano Obs. in Italy, 1 in MPEC 2020-A77 -- 2020 AY1
691Spacewatch 0.9m telescope in Arizona, 15 in MPEC 2020-A81 -- 2020 AO1, 2020 AK, 2019 YW2, 2019 YG1, 2019 YD1, 2019 YA1, 2019 WR4, 2019 UT9, 2019 UJ15, 2019 SC9, 2019 MS3, 2016 LM8, 2015 AJ44, 2001 QC34, 85713
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2020-A81 & 2020-A83 -- 2020 AW, 2020 AR1, 2020 AK, 2020 AE2, 2020 AE, 2020 AC1, 2019 YP3, 2019 YE1, 2019 YA5, 2019 YA2, 2019 XU2, 2019 WR4, 2019 QR6, 2013 CQ35, 2013 CA88, 2008 PG2
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-A81 -- 162004
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2020-A76, 2020-A77 & 2020-A81 -- 2020 AY1, 2020 AX1, 2020 AT1, 2019 OA3
I52Steward Obs. Mt. Lemmon Station in Arizona, 41 in MPECs 2020-A76, 2020-A77, 2020-A78, 2020-A79, 2020-A80, 2020-A81, 2020-A84 & 2020-A85 -- 2020 AZ1, 2020 AY1, 2020 AX1, 2020 AX, 2020 AT, 2020 AK, 2020 AF2, 2020 AF1, 2020 AE, 2020 AD1, 2020 AB2, 2020 AB, 2020 AA2, 2019 YZ3, 2019 YW5, 2019 YW3, 2019 YW2, 2019 YV, 2019 YU5, 2019 YU3, 2019 YT2, 2019 YS4, 2019 YS3, 2019 YP5, 2019 YM3, 2019 YK4, 2019 YH, 2019 YE5, 2019 YE4, 2019 YD1, 2019 YC5, 2019 YA5, 2019 YA, 2019 XL1, 2019 WG7, 2019 OA5, 2019 OA3, 2018 LM4, 2016 CA32, 2015 OL35, 2011 UC292
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2020-A81 -- 13651
C57TESS in Earth orbit, 19 in MPEC 2020-A81 -- 2019 NC1, 2019 MA2, 2019 GU2, 2014 QK433, 2014 PF68, 90403, 52387, 472263, 463282, 455432, 454177, 250697, 249886, 162269, 162082, 112221, 105140, 1866, 1865
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A82 -- 2014 XQ3
L01Visnjan Obs., 7 in MPECs 2020-A76, 2020-A77, 2020-A78, 2020-A79, 2020-A80, 2020-A81 & 2020-A84 -- 2020 AZ1, 2020 AY1, 2020 AX1, 2020 AF2, 2020 AB2, 2020 AA2, 2019 OA3
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2020-A81 -- 333555
I41Zwicky Transient Facility (ZTF) in southern California, 6 in MPEC 2020-A81 -- 2019 BO1, 329340, 142040, 6455, 1916, 1863
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 January '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2307 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
2020 AY1NEODyS1710210311.59e-08-8.26-8.260NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2020-01-05.242 to 2020-01-05.980."
2020 AR1NEODyS17102072-210962.4e-07-7.89-8.360NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2020-01-04.271 to 2020-01-06.275."
JPL Sentry16352102-210213.922e-08-8.78-8.780JPL: Computed at 06:24 today Pacific time based on 34 observations spanning 2.0042 days (2020-Jan-04.2701 to 2020-Jan-06.2743). Diameter approximately 0.012 km. from weighted mean H=27.23.
2020 AO1JPL Sentry1635R E M O V E DJPL: Risk listing removed at 1427 UTC today
NEODyS17102049-205823.59e-08-6.43-6.440NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2020-01-04.272 to 2020-01-06.309."
2020 AC1NEODyS17102093-2117164.49e-06-7.42-7.770NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2020-01-04.268 to 2020-01-06.263."
JPL Sentry16352093-211784.29332e-06-7.44-7.880JPL: Computed at 06:34 today Pacific time based on 37 observations spanning 1.9945 days (2020-Jan-04.267512 to 2020-Jan-06.26206). Diameter approximately 0.007 km. from weighted mean H=28.42.
2020 AWNEODyS17102063-21181521.13e-04-6.06-6.750NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2020-01-03.353 to 2020-01-06.222."
JPL Sentry16352044-2118820.000174526958-5.84-6.550JPL: Computed at 06:50 today Pacific time based on 20 observations spanning 2.8586 days (2020-Jan-03.36222 to 2020-Jan-06.22082). Diameter approximately 0.006 km. from weighted mean H=28.68.
2020 AKNEODyS1710R E M O V E D-
2019 YA3NEODyS17102095-210326.55e-08-8.16-8.230NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2019-12-24.424 to 2020-01-06.235."
JPL Sentry16352095-211622.40018e-08-8.59-8.600JPL: Computed at 06:13 today Pacific time based on 16 observations spanning 12.811 days (2019-Dec-24.422791 to 2020-Jan-06.23403). Diameter approximately 0.018 km. from weighted mean H=26.42.
2019 YW2NEODyS17102113-211521.12e-07-6.72-6.820NEODyS: "Based on 96 optical observations (of which 2 are rejected as outliers) from 2019-12-24.514 to 2020-01-06.216."
JPL Sentry16352106-211944.0474e-07-6.17-6.540JPL: Computed at 06:24 today Pacific time based on 95 observations spanning 12.701 days (2019-Dec-24.513641 to 2020-Jan-06.21481). Diameter approximately 0.055 km. from weighted mean H=23.93.
2019 YA2JPL Sentry1635R E M O V E DJPL: Risk listing removed at 1435 UTC today
2019 YV1NEODyS17102089-2118158.59e-06-5.50-5.780NEODyS: "Based on 71 optical observations (of which 0 are rejected as outliers) from 2019-12-21.112 to 2020-01-06.283."
JPL Sentry16352089-2119111.268715e-05-5.32-5.630JPL: Computed at 06:13 today Pacific time based on 71 observations spanning 16.171 days (2019-Dec-21.11125 to 2020-Jan-06.28253). Diameter approximately 0.033 km. from weighted mean H=25.03.

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 6 January '20

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

2307Grabbed MPEC 2020-A85 - 2011 UC292 - see above
2211Generated Traffic Report
1710Noted that NEODyS has updated its 2019 YA3 risk assessment - see above
Noted that NEODyS has updated its 2019 YV1 risk assessment - see above
Noted that NEODyS has updated its 2019 YW2 risk assessment - see above
Noted that NEODyS has updated its 2020 AC1 risk assessment - see above
Noted that NEODyS has removed 2020 AK as an impact risk - see above
Noted that NEODyS has updated its 2020 AO1 risk assessment - see above
Noted that NEODyS has updated its 2020 AR1 risk assessment - see above
Noted that NEODyS has updated its 2020 AW risk assessment - see above
Noted that NEODyS has posted 2020 AY1 as an impact risk - see above
1635Noted that JPL Sentry has removed 2019 YA2 as an impact risk - see above
Noted that JPL Sentry has updated its 2019 YA3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YV1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AC1 risk assessment - see above
Noted that JPL Sentry has removed 2020 AO1 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 AR1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AW risk assessment - see above
Grabbed MPEC 2020-A81 - Daily Orbit Update - see above
Grabbed MPEC 2020-A82 - 2014 XQ3 - see above
Grabbed MPEC 2020-A83 - 2020 AE2 - see above
Grabbed MPEC 2020-A84 - 2020 AF2 - see above
0640Grabbed MPEC 2020-A80 - 2020 AB2 - see above
0208Grabbed MPEC 2020-A78 - 2020 AZ1 - see above
Grabbed MPEC 2020-A79 - 2020 AA2 - see above
0012Grabbed MPEC 2020-A77 - 2020 AY1 - see above
0001Grabbed MPEC 2020-A76 - 2020 AX1 - see above