Contents  on 2 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 2 January '20

Nine objects reported inside ten LD

Nine transient natural objects are reported moving within ten lunar distances (LD) of our planet today. Inside Earth's SOI, 2020 AD comes its closest to our planet this time around, reaching 2.33 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
1.74 LD Dec. 30 2019 YL3 10 m  5.29 to 7.44 LD Dec. 26 - Jan. 4 risk
2.22 LD Dec. 29 2019 YS2 13 m  5.63 to 6.84 LD Dec. 21 - Jan. 5 NHATS target
2.33 LD today 2020 AD 13 m  2.33 LD Dec. 30 - Jan. 5 Earth closest at 0912 UTC - DOU
3.27 LD Jan. 4 2019 YB4 15 m  3.80 from 4.65 LD Dec. 28 - Jan. 11 NHATS target - DOU
3.37 LD today 2020 AC 16 m  3.37 LD Dec. 26 - Jan. 9 NHATS target, Earth closest at 0655 UTC - DOU
3.7   LD Jan. 10* 2019 YF4 15 m  6.0 from 6.6 LD Dec. 27 - Jan. 25 EPU +/- 38 mins.*, NHATS target
4.8   LD today* 2019 AE3 12 m  4.8 LD Dec. 28 - Jan. 7 EPU +/- 1.27 hours*, NHATS target, Earth closest at 1607 UTC
6.69 LD Dec. 29 2020 AB 22 m  8.31 to 9.24 LD Dec. 24 - tomorrow DOU
7.35 LD today 2019 YH2 81 m  7.35 LD Dec. 31 - Jan. 4 Earth closest at 0935 UTC
Approaching - sorted by 10-LD bubble entry date
6.33 LD Jan. 11 2019 WC5 105 m  25.00 from 27.87 LD Jan. 8 - 13 DOU
6.9   LD Jan. 16* 2019 YD3 21 m  16.2 from 17.2 LD Jan. 9 - 22 EPU +/- 13 mins.*, NHATS target - DOU
* EPU = Earth passage uncertainty

This report was generated at 2040 UTC with the discovery of already departed 2020 AG (MPEC), which slipped by us at about 8.1 LD on December 22nd (uncertainty +/- 17 minutes), and with follow-up in today's DOU MPEC for approaching objects 2019 YD3 and 2019 WC5, inbound 2019 YB4, passing 2020 AD and 2020 AC, outbound 2020 AB, and seven departed objects: 2019 YA4, 2019 YR3, 2019 YK2, 2019 YA1, and including three risk-listed: 2019 YW2, 2019 YX1, and 2019 XQ2.

Please check out our new standalone "Earth's Busy Neighborhood" page with a traffic report and expanded, interactive traffic tables.



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 2 January '20

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 76 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 2 January '20

Minor Planet Electronic Circulars

As of last check at 2330 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-A33 - "20:30 UT" - 2020 AK


MPEC 2020-A32 - "19:14 UT" - 2020 AJ


MPEC 2020-A31 - "17:52 UT" - 2019 YA6


MPEC 2020-A30 - "17:50 UT" - 2019 YZ5


MPEC 2020-A29 - "17:47 UT" - 2019 YY5


MPEC 2020-A28 - "17:43 UT" - 2019 YX5


<< DOU on 2 January '20 >>  MPEC 2020-A27 - "12:11 UT" - Daily Orbit Update


MPEC 2020-A26 - "03:39 UT" - 2020 AG

Observers  on 2 January '20

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 24 in MPECs 2020-A27 & 2020-A30 -- 2019 YZ5, 2019 YV, 2019 YK2, 2019 YE1, 2019 YD1, 2019 YA1, 2019 YA, 2019 XX, 2019 XW2, 2019 XP3, 2019 XP2, 2019 XJ2, 2019 XC2, 2019 VU4, 2019 UB11, 2019 NT6, 2014 DH23, 2013 CL89, 2011 UV63, 2008 OX1, 516155, 412976, 232382, 5324
T05ATLAS Haleakala in Hawaii, 7 in MPEC 2020-A27 -- 1996 AE2, 54686, 458452, 35107, 349063, 18882, 138847
T08ATLAS Mauna Loa in Hawaii, 14 in MPEC 2020-A27 -- 52768, 512245, 455322, 36284, 34613, 214088, 203015, 163373, 137924, 10145, 7088, 5626, 1864, 1627
C77Bernezzo Obs. in Italy, 1 in MPEC 2020-A27 -- 2020 AB
160Castelmartini Obs. in Italy, 1 in MPEC 2020-A27 -- 2020 AB
703Catalina Sky Survey (CSS) in Arizona, 18 in MPEC 2020-A27 -- 2019 YL1, 2019 UJ15, 2018 BP, 2014 NF64, 2006 KY86, 516986, 458732, 428223, 349063, 329340, 307070, 163081, 162825, 153842, 138013, 106589, 106538, 2059
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 18 in MPECs 2020-A27, 2020-A28 & 2020-A33 -- 2020 AK, 2019 YX5, 2019 YV3, 2019 YV2, 2019 YS3, 2019 YQ1, 2019 YL1, 2019 YG3, 2019 YC, 2019 XZ2, 2019 XJ3, 2019 XG3, 2019 XB2, 2019 WT4, 2019 VO1, 2019 VF6, 2019 UJ2, 2019 UA14
958Dax Obs. in France, 1 in MPEC 2020-A27 -- 2020 AC
595Farra d'Isonzo Obs. in Italy, 3 in MPEC 2020-A27 -- 2020 AE, 2020 AD, 2020 AC
246KLENOT in the Czech Republic, 14 in MPEC 2020-A27 -- 2020 AD, 2019 YW2, 2019 YW, 2019 YU3, 2019 YT3, 2019 YK4, 2019 YD2, 2019 YB4, 2019 YA4, 2019 XL1, 2019 XC3, 2019 WD5, 2019 WC5, 2019 UB11
K38M57 Obs. in Italy, 4 in MPEC 2020-A27 -- 2019 YM3, 2019 YK4, 2019 XX, 2016 XO23
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2020-A29, 2020-A30 & 2020-A31 -- 2019 YZ5, 2019 YY5, 2019 YA6
W92MASTER OAFA Obs., 1 in MPEC 2020-A27 -- 138013
D54MASTER-II Blagoveshchensk in Russia, 1 in MPEC 2020-A27 -- 1866
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2020-A27 -- 138013
474Mt. John Obs. in New Zealand, 2 in MPECs 2020-A29 & 2020-A33 -- 2020 AK, 2019 YY5
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPEC 2020-A27 -- 2019 XJ3, 2019 RD, 2019 LK5, 2014 NF64, 2013 UV10, 18106, 3102
K74Muensterschwarzach Obs. in Germany, 2 in MPEC 2020-A27 -- 20826, 137170
C47Nonndorf Obs. in Austria, 3 in MPEC 2020-A27 -- 2019 YK4, 2019 YB4, 2019 SH6
J43Oukaimeden Obs. in Morocco, 5 in MPEC 2020-A27 -- 2019 YW2, 2014 YU43, 374188, 338347, 159504
F51Pan-STARRS 1 (PS1) in Hawaii, 31 in MPECs 2020-A26, 2020-A27, 2020-A28, 2020-A29, 2020-A31, 2020-A32 & 2020-A33 -- 2020 AK, 2020 AJ, 2020 AG, 2019 YY5, 2019 YX5, 2019 YE4, 2019 YA6, 2019 WF1, 2019 WC6, 2019 WC2, 2019 VN6, 2019 OJ, 2018 AG2, 2015 HU116, 2014 YU43, 2014 NW64, 2007 JH22, 2006 KY86, 2005 YN3, 2005 XP66, 467317, 381906, 267940, 22771, 164221, 154988, 152679, 138175, 13553, 12923, 105141
F52Pan-STARRS 2 (PS2) in Hawaii, 2 in MPECs 2020-A30 & 2020-A32 -- 2020 AJ, 2019 YZ5
L04ROASTERR-1 in Romania, 4 in MPEC 2020-A27 -- 2019 YR3, 2019 YM3, 2019 UO, 437316
K61Rokycany Obs. in the Czech Republic, 2 in MPEC 2020-A27 -- 2019 YK4, 2019 WC5
104San Marcello Pistoiese Obs. in Italy, 4 in MPECs 2020-A27 & 2020-A31 -- 2020 AB, 2019 YU5, 2019 YQ5, 2019 YA6
233San Vito Obs. in Italy, 1 in MPEC 2020-A27 -- 99248
C95SATINO-1 in France, 1 in MPEC 2020-A27 -- 2013 PV2
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-A31 -- 2019 YA6
033Schwarzschild Obs. in Germany, 5 in MPECs 2020-A26, 2020-A28, 2020-A30, 2020-A31 & 2020-A33 -- 2020 AK, 2020 AG, 2019 YZ5, 2019 YX5, 2019 YA6
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2020-A27 -- 2019 YG1, 2019 YD1, 2019 VF6, 2016 LM8
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2020-A27 -- 2019 YX1, 2019 XQ2, 2019 XQ
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2020-A27 -- 2019 YA, 2019 XX
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPEC 2020-A27 -- 2019 YZ3, 2019 YV, 2019 YT1, 2019 YP2, 2019 YD3, 2019 YA4, 2019 WF3
K62Teplice Obs. in the Czech Republic, 2 in MPEC 2020-A27 -- 2020 AD, 2020 AC
B18Terskol Obs. in Russia, 1 in MPEC 2020-A27 -- 2011 WN15
L01Visnjan Obs., 6 in MPECs 2020-A26, 2020-A28, 2020-A29, 2020-A30, 2020-A31 & 2020-A33 -- 2020 AK, 2020 AG, 2019 YZ5, 2019 YY5, 2019 YX5, 2019 YA6
198Wildberg Obs. in Germany, 1 in MPEC 2020-A27 -- 2020 AB
I15Wishing Star Obs. in Rhode Island, 7 in MPEC 2020-A27 -- 2019 XW2, 2014 NF64, 85236, 418849, 338347, 333555, 163696
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 January '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2330 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 AKNEODyS23302025-211692.01e-09-5.71-6.040NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2019-12-29.608 to 2020-01-02.638."
JPL Sentry21302025-2116191.58134e-08-4.46-4.770JPL: Computed at 13:29 today Pacific time based on 21 observations spanning 4.0301 days (2019-Dec-29.60694 to 2020-Jan-02.637089). Diameter approximately 0.501 km. from weighted mean H=19.15.
2019 YW2JPL Sentry16002119-211915.225e-08-7.00-7.000JPL: Computed at 07:02 today Pacific time based on 64 observations spanning 8.4127 days (2019-Dec-24.513641 to 2020-Jan-01.92634). Diameter approximately 0.059 km. from weighted mean H=23.81.
NEODyS16002113-211528.28e-08-6.80-6.890NEODyS: "Based on 65 optical observations (of which 2 are rejected as outliers) from 2019-12-24.514 to 2020-01-01.927."
2019 YX1JPL Sentry16002081-208143.0369e-05-4.44-4.680JPL: Computed at 07:00 today Pacific time based on 46 observations spanning 11.229 days (2019-Dec-21.325253 to 2020-Jan-01.55464). Diameter approximately 0.044 km. from weighted mean H=24.41.
NEODyS16002081-2102111.09e-04-3.90-4.330NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2019-12-21.326 to 2020-01-01.555."
2019 XQ2JPL Sentry16002084-208413.202e-08-7.54-7.540JPL: Computed at 06:59 today Pacific time based on 41 observations spanning 1.8810 days (2019-Dec-06.40195 to 2019-Dec-08.282962). Diameter approximately 0.037 km. from weighted mean H=24.78.

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 2 January '20

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

2330Noted that NEODyS has posted 2020 AK as an impact risk - see above
2130Noted that JPL Sentry has posted 2020 AK as an impact risk - see above
2101Grabbed MPEC 2020-A33 - 2020 AK - see above
2040Generated Traffic Report
1930Grabbed MPEC 2020-A32 - 2020 AJ - see above
1800Grabbed MPEC 2020-A28 - 2019 YX5 - see above
Grabbed MPEC 2020-A29 - 2019 YY5 - see above
Grabbed MPEC 2020-A30 - 2019 YZ5 - see above
Grabbed MPEC 2020-A31 - 2019 YA6 - see above
1600Noted that JPL Sentry has updated its 2019 XQ2 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 2019 YX1 risk assessment - see above
Noted that NEODyS has updated its 2019 YX1 risk assessment - see above
Grabbed MPEC 2020-A27 - Daily Orbit Update - see above
0434Grabbed MPEC 2020-A26 - 2020 AG - see above