Contents  on 8 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 8 January '20

Fourteen objects reported inside ten LD

Fourteen asteroids are reported inside ten lunar distances (LD) of Earth today. The closest is 2020 AT1, coming in from 3.23 to 2.56 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  6.61 to 7.81 LD Dec. 25 - Jan. 10 intruder, NHATS target
2.08 LD Jan. 2 2020 AC1 7 m  7.32 to 8.67 LD Dec. 26 - tomorrow NHATS target, risk - DOU
2.47 LD tomorrow 2020 AT1 11 m  2.56 from 3.23 LD Jan. 2 - 16 NHATS target - DOU
3.27 LD Jan. 4 2019 YB4 15 m  5.83 to 7.00 LD Dec. 28 - Jan. 11 NHATS target
3.37 LD Jan. 2 2020 AC 16 m  8.10 to 9.28 LD Dec. 26 - tomorrow NHATS target - DOU
3.71 LD Jan. 10 2019 YF4 14 m  3.82 from 4.02 LD Dec. 27 - Jan. 25 NHATS target
3.8   LD Jan. 12* 2020 AB2 14 m  8.0 from 9.6 LD yesterday - Jan. 18 EPU +/- 10 mins.*, NHATS target
4.13 LD Jan. 6 2020 AU1 17 m  4.98 to 5.88 LD Dec. 30 - Jan. 12 DOU
4.76 LD Jan. 6 2020 AW 6 m  5.11 to 5.52 LD Dec. 27 - Jan. 15 NHATS target, risk
6.20 LD Jan. 10 2020 AL2 26 m  9.35 from 14.02 LD today - Jan. 11 enters ten LD
6.33 LD Jan. 11 2019 WC5 104 m  9.13 from 11.42 LD today - Jan. 13 enters ten LD - DOU
6.5   LD Jan. 13* 2020 AE1 11 m  7.8 from 8.4 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target
6.91 LD today 2020 AR1 12 m  6.91 LD Jan. 4 - 11 Earth closest at 0517 UTC, risk
7.23 LD yesterday 2020 AV1 21 m  7.46 to 8.54 LD Jan. 4 - 9

This report was generated at 2140 UTC with follow-up in today's DOU MPEC for three approaching objects in the traffic table below and, in the above table, two inbound and three outbound objects, and for eleven departed objects: 2020 AN1, 2020 AG, 2019 YA4, 2019 XN3, 2019 XQ2, 2019 YA1, and including five risk-listed -- 2020 AY1, 2019 YP3, 2019 YL3, 2019 YW2, and 2019 YV1, plus astrometry from early December for 2019 XF2, 2019 XY, and 2019 XN.

Approaching - sorted by 10-LD bubble entry date
Earth passage I D ~Size Distance today  Inside ten LD Notes
6.86 LD Jan. 16 2019 YD3 21 m  10.48 from 11.35 LD tomorrow - Jan. 22 NHATS target
8.2   LD Jan. 16* 2020 AZ1 16 m  10.4 from 10.9 LD tomorrow - Jan. 22 EPU +/- 5 mins.*, NHATS target
8.51 LD Jan. 12 2020 AO1 62 m  17.38 from 20.96 LD Jan. 11 - 14 risk - DOU
9.08 LD Jan. 17 2020 AD1 18 m  12.85 from 13.62 LD Jan. 13 - 22 NHATS target - DOU
9.31 LD Jan. 14 2020 AO 46 m  26.88 from 31.05 LD Jan. 13 - 15 DOU
* EPU = Earth passage uncertainty

Our new "Earth's Busy Neighborhood" page has had improvements posted yesterday and today, and there are more coming, bit by bit.



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 '20

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 39 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 '20

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 2020-A100 - "20:34 UT" - 2020 AW2


MPEC 2020-A99 - "20:24 UT" - 2020 AV2


MPEC 2020-A98 - "20:18 UT" - 2020 AU2


MPEC 2020-A97 - "20:13 UT" - 2020 AT2


MPEC 2020-A96 - "14:57 UT" - 2020 AS2


MPEC 2020-A95 - "14:53 UT" - 2020 AR2


MPEC 2020-A94 - "14:49 UT" - 2020 AQ2


MPEC 2020-A93 - "14:45 UT" - 2020 AP2


<< DOU on 8 January '20 >>  MPEC 2020-A92 - "12:12 UT" - Daily Orbit Update

Observers  on 8 January '20

A total of 41 observers appear in today's MPECs.

CodeObserver / observatory
1192program code 2 via Abastumani Obs. in Georgia, 1 in MPEC 2020-A99 -- 2020 AV2
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2020-A92, 2020-A95 & 2020-A97 -- 2020 AT2, 2020 AR2, 2020 AJ1, 2019 YK4, 2019 XU2, 2019 XQ2, 2019 XG2, 2019 UB11, 2019 SH6, 2019 QT8, 2019 OJ, 2016 UT80, 2012 MB7, 52768, 458745, 163696, 106538, 6239, 5626
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2020-A92 -- 2016 LE9, 428223, 18882, 143947, 143527, 138847
C77Bernezzo Obs. in Italy, 1 in MPEC 2020-A99 -- 2020 AV2
215Buchloe Obs. in Germany, 1 in MPEC 2020-A99 -- 2020 AV2
160Castelmartini Obs. in Italy, 18 in MPECs 2020-A92 & 2020-A99 -- 2020 AV2, 2019 XG1, 2019 SH6, 2016 WE1, 2015 HU116, 52768, 458745, 409342, 349063, 311044, 30825, 243025, 214088, 203015, 137199, 106538, 103067, 5626
703Catalina Sky Survey (CSS) in Arizona, 26 in MPEC 2020-A92 -- 2019 WC5, 2019 UJ15, 2018 BP, 2017 MX4, 66146, 54686, 492143, 450160, 428223, 35107, 349063, 329340, 20826, 163250, 162825, 140288, 138127, 138013, 137925, 137170, 5626, 4954, 4055, 3691, 3352, 1221
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-A95 -- 2020 AR2
470Ceccano Obs. in Italy, 1 in MPEC 2020-A99 -- 2020 AV2
734Farpoint Obs. in Kansas, 3 in MPECs 2020-A92 & 2020-A99 -- 2020 AV2, 2019 XW2, 2016 WE1
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2020-A92 & 2020-A99 -- 2020 AV2, 2010 AE30
K88GINOP-KHK in Hungary, 1 in MPEC 2020-A99 -- 2020 AV2
H06qprogram code "q" via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-A99 -- 2020 AV2
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-A99 -- 2020 AV2
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 10 in MPEC 2020-A92 -- 2019 YV1, 2019 YP3, 2019 YA2, 2019 YA, 2019 XN3, 2019 US6, 2019 SU, 2019 QX, 2011 GD60, 2006 XP4
246KLENOT in the Czech Republic, 2 in MPEC 2020-A92 -- 2020 AE, 2019 XF2
950.EURONEAR via La Palma in the Canary Islands, 1 in MPEC 2020-A99 -- 2020 AV2
Z43Landehen Obs., 2 in MPEC 2020-A92 -- 2020 AN1, 333555
V37LCO McDonald Obs. in Texas, 1 in MPEC 2020-A92 -- 2019 YA5
V39LCO McDonald Obs. B in Texas, 1 in MPEC 2020-A92 -- 2020 AO
K38M57 Obs. in Italy, 1 in MPEC 2020-A99 -- 2020 AV2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2020-A93, 2020-A94, 2020-A95, 2020-A96, 2020-A97 & 2020-A98 -- 2020 AU2, 2020 AT2, 2020 AS2, 2020 AR2, 2020 AQ2, 2020 AP2
W92MASTER OAFA Obs., 1 in MPEC 2020-A92 -- 138013
675@program code "@" (41) via Mount Palomar in southern California, 1 in MPEC 2020-A99 -- 2020 AV2
G96Mt. Lemmon Survey (MLS) in Arizona, 28 in MPECs 2020-A92, 2020-A93, 2020-A94, 2020-A95, 2020-A96, 2020-A97, 2020-A98 & 2020-A100 -- 2020 AW2, 2020 AU2, 2020 AT2, 2020 AS2, 2020 AR2, 2020 AQ2, 2020 AP2, 2019 YZ3, 2019 TL4, 2018 BP, 2017 MX4, 2016 NL15, 2012 VF80, 2011 AM24, 2010 CH55, 2006 YU1, 1999 DB2, 90075, 68278, 488490, 438452, 427778, 26760, 18106, 136618, 136582, 3988, 719
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2020-A96, 2020-A97 & 2020-A98 -- 2020 AU2, 2020 AT2, 2020 AS2
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2020-A92 -- 192563
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2020-A99 -- 2020 AV2
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2020-A99 -- 2020 AV2
H36Sandlot Obs. in Kansas, 3 in MPECs 2020-A96, 2020-A98 & 2020-A100 -- 2020 AW2, 2020 AU2, 2020 AS2
C95SATINO-1 in France, 3 in MPECs 2020-A92, 2020-A98 & 2020-A99 -- 2020 AV2, 2020 AU2, 2015 XL128
204Schiaparelli Obs. in Italy, 34 in MPECs 2020-A92, 2020-A95, 2020-A96, 2020-A98 & 2020-A99 -- 2020 AV2, 2020 AU2, 2020 AT1, 2020 AS2, 2020 AR2, 2020 AG, 2020 AE, 2020 AD1, 2020 AC1, 2020 AC, 2019 YW5, 2019 YW, 2019 YR4, 2019 YP2, 2019 YL3, 2019 YG2, 2019 YE1, 2019 YD2, 2019 YC, 2019 YA4, 2019 XY, 2019 XX, 2019 XW, 2019 XQ, 2019 XN, 2019 XB, 2019 XA1, 2019 WZ, 2019 WR4, 2016 UT80, 2013 UV10, 2013 AW52, 2011 YS62, 2010 DN1
033Schwarzschild Obs. in Germany, 1 in MPEC 2020-A97 -- 2020 AT2
587Sormano Obs. in Italy, 1 in MPEC 2020-A99 -- 2020 AV2
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2020-A92 & 2020-A96 -- 2020 AS2, 2020 AO1, 2019 YW2, 2019 YG1, 2019 YA5, 2019 XY2, 2019 UJ15, 2014 YU43, 2001 QC34
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2020-A92 & 2020-A94 -- 2020 AY1, 2020 AQ2, 2019 YD1, 2019 YA1, 2019 QR6, 2016 GU216, 2010 CT
I52Steward Obs. Mt. Lemmon Station in Arizona, 14 in MPECs 2020-A92, 2020-A93, 2020-A94, 2020-A95, 2020-A96, 2020-A97, 2020-A98, 2020-A99 & 2020-A100 -- 2020 AX, 2020 AW2, 2020 AV2, 2020 AU2, 2020 AT2, 2020 AS2, 2020 AR2, 2020 AQ2, 2020 AP2, 2020 AK, 2019 XN1, 2019 XL1, 2019 XG, 2015 HB10
A16Tentlingen Obs. in Switzerland, 4 in MPEC 2020-A92 -- 99248, 192563, 137199, 9400
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-A92 -- 2019 WZ, 2019 UT3
L01Visnjan Obs., 5 in MPECs 2020-A94, 2020-A95, 2020-A96, 2020-A97 & 2020-A100 -- 2020 AW2, 2020 AT2, 2020 AS2, 2020 AR2, 2020 AQ2
C42Xingming Obs. in China, 1 in MPEC 2020-A99 -- 2020 AV2
I41Zwicky Transient Facility (ZTF) in southern California, 11 in MPECs 2020-A92 & 2020-A99 -- 2020 AV2, 2020 AU1, 2019 YH4, 2010 WF3, 511523, 465617, 36284, 34613, 238063, 137924, 1916
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 January '20

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
2020 AY1JPL Sentry16302103-210311.112e-07-7.39-7.390JPL: Computed at 07:59 today Pacific time based on 78 observations spanning 3.2340 days (2020-Jan-05.24158 to 2020-Jan-08.47562). Diameter approximately 0.033 km. from weighted mean H=25.09.
NEODyS1630210315.11e-08-7.74-7.740NEODyS: "Based on 78 optical observations (of which 1 are rejected as outliers) from 2020-01-05.242 to 2020-01-08.476."
2020 AO1JPL Sentry16302049-204919.133e-08-6.01-6.010JPL: Computed at 07:31 today Pacific time based on 86 observations spanning 4.0290 days (2020-Jan-04.27153 to 2020-Jan-08.30052). Diameter approximately 0.062 km. from weighted mean H=23.68.
NEODyS1630204915.7e-08-6.23-6.230NEODyS: "Based on 86 optical observations (of which 0 are rejected as outliers) from 2020-01-04.272 to 2020-01-08.301."
2020 AC1JPL Sentry16302093-2117104.51474e-06-7.41-7.890JPL: Computed at 07:41 today Pacific time based on 41 observations spanning 2.9910 days (2020-Jan-04.267512 to 2020-Jan-07.25855). Diameter approximately 0.007 km. from weighted mean H=28.41.
NEODyS16302093-2117135.51e-06-7.33-7.930NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-01-04.268 to 2020-01-07.259."
2019 YP3JPL Sentry16302103-210315.787e-09-8.93-8.930JPL: Computed at 08:18 today Pacific time based on 52 observations spanning 11.826 days (2019-Dec-27.53345 to 2020-Jan-08.35952). Diameter approximately 0.023 km. from weighted mean H=25.87.
NEODyS16302099-211121.44e-07-7.58-7.60NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2019-12-27.534 to 2020-01-08.360."
2019 YL3JPL Sentry16302047-204711.120e-07-8.05-8.050JPL: Computed at 07:35 today Pacific time based on 36 observations spanning 4.1836 days (2019-Dec-28.389529 to 2020-Jan-01.573085). Diameter approximately 0.010 km. from weighted mean H=27.70.
2019 YW2JPL Sentry16302119-211924.097e-07-6.19-6.460JPL: Computed at 07:38 today Pacific time based on 104 observations spanning 14.843 days (2019-Dec-24.513641 to 2020-Jan-08.35693). Diameter approximately 0.054 km. from weighted mean H=23.97.
NEODyS16302106-211531.11e-07-6.74-6.860NEODyS: "Based on 106 optical observations (of which 4 are rejected as outliers) from 2019-12-24.514 to 2020-01-08.358."
2019 YA2NEODyS1630210117.33e-09-7.18-7.180NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2019-12-20.486 to 2020-01-08.321."
2019 YV1JPL Sentry16302089-211381.58522e-05-5.26-5.330JPL: Computed at 07:19 today Pacific time based on 77 observations spanning 18.000 days (2019-Dec-21.11125 to 2020-Jan-08.11158). Diameter approximately 0.033 km. from weighted mean H=25.07.
NEODyS16302089-2118121.51e-05-5.30-5.360NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2019-12-21.112 to 2020-01-08.112."

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 '20

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

2140Generated Traffic Report
2130Grabbed MPEC 2020-A97 - 2020 AT2 - see above
Grabbed MPEC 2020-A98 - 2020 AU2 - see above
Grabbed MPEC 2020-A99 - 2020 AV2 - see above
Grabbed MPEC 2020-A100 - 2020 AW2 - see above
1630Noted that NEODyS has updated its 2019 YA2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YL3 risk assessment - see above
Noted that JPL Sentry has reposted 2019 YP3 as an impact risk - see above
Noted that NEODyS has updated its 2019 YP3 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YV1 risk assessment - see above
Noted that NEODyS has updated its 2019 YV1 risk assessment - see above
Noted that JPL Sentry has updated its 2019 YW2 risk assessment - see above
Noted that NEODyS has updated its 2019 YW2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AC1 risk assessment - see above
Noted that NEODyS has updated its 2020 AC1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AO1 risk assessment - see above
Noted that NEODyS has updated its 2020 AO1 risk assessment - see above
Noted that JPL Sentry has posted 2020 AY1 as an impact risk - see above
Noted that NEODyS has reposted 2020 AY1 as an impact risk - see above
Grabbed MPEC 2020-A92 - Daily Orbit Update - see above
Grabbed MPEC 2020-A93 - 2020 AP2 - see above
Grabbed MPEC 2020-A94 - 2020 AQ2 - see above
Grabbed MPEC 2020-A95 - 2020 AR2 - see above
Grabbed MPEC 2020-A96 - 2020 AS2 - see above