Contents  on 7 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 7 January '20

Fourteen objects reported inside ten LD

Fourteen objects are reported inside ten lunar distances (LD) of our planet today. Nearest is 2020 AT1, which moves in from 4.26 to 3.23 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  5.40 to 6.61 LD Dec. 25 - Jan. 10 intruder, NHATS target
2.08 LD Jan. 2 2020 AC1 7 m  6.00 to 7.32 LD Dec. 26 - Jan. 9 NHATS target, risk - DOU
2.47 LD Jan. 9 2020 AT1 11 m  3.23 from 4.26 LD Jan. 2 - 16 NHATS target - DOU
2.57 LD Jan. 4 2020 AN1 22 m  7.64 to 10.19 LD Dec. 31 - today exits ten LD - DOU
3.27 LD Jan. 4 2019 YB4 15 m  4.77 to 5.83 LD Dec. 28 - Jan. 11 NHATS target
3.37 LD Jan. 2 2020 AC 16 m  6.95 to 8.10 LD Dec. 26 - Jan. 9 NHATS target
3.71 LD Jan. 10 2019 YF4 14 m  4.02 from 4.31 LD Dec. 27 - Jan. 25 NHATS target - DOU
3.8   LD Jan. 12* 2020 AB2 14 m  9.6 from 11.3 LD today - Jan. 18 EPU +/- 10 mins.*, NHATS target, enters ten LD - DOU
4.13 LD yesterday 2020 AU1 17 m  4.36 to 4.98 LD Dec. 30 - Jan. 12 DOU
4.76 LD yesterday 2020 AW 6 m  4.84 to 5.11 LD Dec. 27 - Jan. 15 NHATS target, risk
4.8   LD Jan. 2* 2019 AE3 12 m  9.4 to 11.0 LD Dec. 28 - today EPU +/- 1.27 hours*, NHATS target, exits ten LD
6.5   LD Jan. 13* 2020 AE1 11 m  8.4 from 9.0 LD Jan. 5 - 21 EPU +/- 1.28 hours*, NHATS target
6.91 LD tomorrow 2020 AR1 12 m  6.92 from 7.39 LD Jan. 4 - 11 risk - DOU
7.23 LD today 2020 AV1 21 m  7.23 LD Jan. 4 - 9 Earth closest at 0745 UTC - DOU

This report was generated at 2145 UTC with the discoveries of approaching 2020 AL2 (MPEC) and already departed 2020 AN2 (MPEC), which got by us at about 7.9 LD on January 1st. Today's DOU MPEC has follow-up for four approaching objects in the traffic table below and, in the table above, four inbound, one passing, and three outbound objects. The DOU also has follow-up for eight departed objects: 2020 AA2, 2020 AB, 2019 YA1, 2019 XQ2, and including four risk-listed: 2020 AY1, 2019 YP3, 2019 YW2, and 2019 YV1.

Approaching - sorted by 10-LD bubble entry date
6.33 LD Jan. 11 2019 WC5 103 m  11.42 from 13.95 LD tomorrow - Jan. 13
6.20 LD Jan. 10 2020 AL2 26 m  14.02 from 19.18 LD tomorrow - Jan. 11 NEW - MPEC
6.86 LD Jan. 16 2019 YD3 21 m  11.35 from 12.25 LD Jan. 9 - 22 NHATS target - DOU
8.2   LD Jan. 16* 2020 AZ1 16 m  10.9 from 11.5 LD Jan. 9 - 22 EPU +/- 5 mins.*, NHATS target
8.52 LD Jan. 12 2020 AO1 62 m  20.98 from 24.70 LD Jan. 11 - 14 risk - DOU
9.09 LD Jan. 17 2020 AD1 18 m  13.62 from 14.43 LD Jan. 13 - 22 NHATS target - DOU
9.3   LD Jan. 14* 2020 AO 46 m  31.1 from 35.3 LD Jan. 13 - 15 EPU +/- 5 mins.* - DOU
* EPU = Earth passage uncertainty

Our new "Earth's Busy Neighborhood" page, which is still a work in progress, has more info about close-passing objects, has interactive traffic tables, and updates more quickly than this, the long-running but soon-to-end Tracking News Traffic Report.



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 7 January '20

The MPC's NEO Confirmation Page has 37 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 52 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 7 January '20

Minor Planet Electronic Circulars

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


MPEC 2020-A91 - "22:49 UT" - Comet P/2019 Y2 (Fuls)


MPEC 2020-A90 - "19:29 UT" - 2020 AO2


MPEC 2020-A89 - "19:26 UT" - 2020 AN2


MPEC 2020-A88 - "19:23 UT" - 2020 AM2


MPEC 2020-A87 - "19:17 UT" - 2020 AL2


<< DOU on 7 January '20 >>  MPEC 2020-A86 - "12:09 UT" - Daily Orbit Update

Observers  on 7 January '20

A total of 55 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2020-A91 -- P/2019 Y2
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPECs 2020-A86, 2020-A87 & 2020-A90 -- 2020 AO2, 2020 AL2, 2020 AJ1, 2019 YK4, 2019 YD3, 2019 XW2, 2019 XQ2, 2019 XG2, 2019 UX13, 2019 NT6, 2016 HD19, 2016 CJ195, 2014 DH23, 2014 BY32, 2009 UP5, 52768, 466191, 412976, 349219, 311044, 159560, 5626
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2020-A91 -- P/2019 Y2
T08ATLAS Mauna Loa in Hawaii, 2 in MPECs 2020-A86 & 2020-A91 -- P/2019 Y2, 448818
I47Auger Obs. in Argentina, 1 in MPEC 2020-A91 -- P/2019 Y2
B88Bigmuskie Obs. in Italy, 1 in MPEC 2020-A86 -- 2019 XW2
160Castelmartini Obs. in Italy, 11 in MPEC 2020-A86 -- 2019 YT2, 2019 UO, 2019 UB11, 2016 XO23, 2016 UT80, 2014 NF64, 99248, 86326, 418849, 338347, 9400
703Catalina Sky Survey (CSS) in Arizona, 34 in MPECs 2020-A86 & 2020-A91 -- 2019 YM3, 2019 YK4, 2019 YD2, P/2019 Y2, 2019 SH6, 2019 SH1, 90075, 86067, 85628, 512245, 463282, 438452, 417871, 416591, 36284, 34613, 339714, 276397, 203015, 152931, 137924, 137199, 137120, 11066, 103067, 10115, 9400, 7088, 5626, 4450, 3752, 3200, 1627, 1620
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-A90 -- 2020 AO2
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2020-A91 -- P/2019 Y2
Z99Clixby Obs. in England, 7 in MPECs 2020-A86 & 2020-A91 -- 2020 AY1, 2020 AV1, 2020 AO1, 2020 AN1, 2020 AJ1, 2019 YF4, P/2019 Y2
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-A91 -- P/2019 Y2
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-A91 -- P/2019 Y2
K83Forti Obs., 7 in MPEC 2020-A86 -- 2014 NF64, 99248, 52768, 437316, 333555, 311044, 214088
157Frasso Sabino Obs. in Italy, 2 in MPECs 2020-A86 & 2020-A91 -- 2019 YD2, P/2019 Y2
K88GINOP-KHK in Hungary, 4 in MPECs 2020-A86 & 2020-A91 -- 2020 AY1, 2020 AO1, 2020 AN1, P/2019 Y2
J95Great Shefford Obs. in England, 4 in MPECs 2020-A86, 2020-A87 & 2020-A88 -- 2020 AT1, 2020 AM2, 2020 AL2, 2020 AJ1
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2020-A91 -- P/2019 Y2
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-A91 -- P/2019 Y2
585Kiev Comet Station in Ukraine, 1 in MPEC 2020-A91 -- P/2019 Y2
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2020-A86 -- 2020 AY1, 2019 YP1, 2019 YA2
246KLENOT in the Czech Republic, 8 in MPEC 2020-A86 -- 2020 AY1, 2020 AU1, 2020 AO1, 2020 AN1, 2019 YM3, 2019 YF4, 2019 YD2, 2019 SH6
K38M57 Obs. in Italy, 1 in MPEC 2020-A86 -- 2020 AJ1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2020-A87, 2020-A88, 2020-A89 & 2020-A90 -- 2020 AO2, 2020 AN2, 2020 AM2, 2020 AL2
C10Maisoncelles Obs. in France, 1 in MPEC 2020-A91 -- P/2019 Y2
711McDonald Obs. in Texas, 1 in MPEC 2020-A91 -- P/2019 Y2
118Modra Obs. in Slovakia, 2 in MPECs 2020-A86 & 2020-A91 -- P/2019 Y2, 2019 PR2
V39MPC code V39, 2 in MPEC 2020-A86 -- 2020 AQ1, 2020 AO
G96Mt. Lemmon Survey (MLS) in Arizona, 40 in MPECs 2020-A86, 2020-A87, 2020-A88, 2020-A89, 2020-A90 & 2020-A91 -- 2020 AO2, 2020 AN2, 2020 AM2, 2020 AL2, 2019 YM3, 2019 YE4, P/2019 Y2, 2019 WR4, 2019 TL4, 2019 SH6, 2019 SH1, 2016 WE1, 2016 GZ215, 2016 AX147, 2015 AJ44, 2013 CL89, 2010 AE30, 2008 SD, 86067, 68548, 531899, 512245, 511684, 455322, 381906, 331769, 30825, 307070, 203015, 162038, 15745, 154988, 152889, 12923, 11066, 103067, 7088, 5693, 5626, 1627
C23Olmen Obs. in Belgium, 1 in MPEC 2020-A86 -- 437316
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2020-A86 -- 173561, 103067
K63Pascoli Obs. in Italy, 1 in MPEC 2020-A91 -- P/2019 Y2
B49Paus Obs. in Spain, 3 in MPEC 2020-A86 -- 2020 AY1, 2020 AJ1, 2019 YF4
323Perth Obs. in Western Australia, 1 in MPEC 2020-A86 -- 2017 YH
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2020-A86 -- 2020 AN1, 2019 YK4, 2019 YD2, 2019 XG1, 2019 WR2, 2019 SH6, 2018 BP, 2010 WF3, 2002 EY2, 52768, 162825, 103067
K61Rokycany Obs. in the Czech Republic, 2 in MPEC 2020-A86 -- 2020 AJ1, 2019 YF4
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2020-A86, 2020-A87 & 2020-A88 -- 2020 AM2, 2020 AL2, 2008 LW16
H36Sandlot Obs. in Kansas, 3 in MPECs 2020-A86, 2020-A87 & 2020-A91 -- 2020 AY1, 2020 AL2, P/2019 Y2
C95SATINO-1 in France, 2 in MPECs 2020-A86 & 2020-A91 -- P/2019 Y2, 2014 NF64
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-A91 -- P/2019 Y2
Q11Shinshiro Obs., 1 in MPEC 2020-A91 -- P/2019 Y2
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-A86 -- 2013 AW52
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-A91 -- P/2019 Y2
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-A91 -- P/2019 Y2
L06Sormano2 Obs. in Italy, 1 in MPEC 2020-A91 -- P/2019 Y2
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2020-A86 -- 2020 AC1, 2019 YW2, 2019 YD1, 2019 WD5, 2019 UT9, 2019 UJ15, 2019 SC9, 2019 MS3, 2017 ME, 2016 LM8, 2013 DU, 2010 AB78
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2020-A86 -- 2020 AR1, 2019 YV1, 2019 YP3, 2019 YG1, 2019 UO9, 2019 SF2, 2001 QC34
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2020-A86 -- 2019 XW2, 9400
I52Steward Obs. Mt. Lemmon Station in Arizona, 47 in MPECs 2020-A86, 2020-A87, 2020-A88, 2020-A89, 2020-A90 & 2020-A91 -- 2020 AY1, 2020 AX1, 2020 AW1, 2020 AU1, 2020 AS1, 2020 AQ1, 2020 AO2, 2020 AO1, 2020 AO, 2020 AN2, 2020 AN1, 2020 AM2, 2020 AL2, 2020 AK, 2020 AG1, 2020 AD1, 2020 AB2, 2020 AB, 2020 AA2, 2019 YZ3, 2019 YY5, 2019 YW2, 2019 YV, 2019 YU5, 2019 YU3, 2019 YT3, 2019 YR4, 2019 YP5, 2019 YP4, 2019 YO2, 2019 YM6, 2019 YM3, 2019 YM2, 2019 YL4, 2019 YK4, 2019 YE4, 2019 YA1, 2019 YA, P/2019 Y2, 2019 XX, 2019 XW2, 2019 XL1, 2019 XC3, 2019 WX4, 2019 WD5, 2019 UZ13, 2015 YR1
A71Stixendorf Obs. in Austria, 1 in MPEC 2020-A91 -- P/2019 Y2
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2020-A91 -- P/2019 Y2
X02Telescope Live in Chile, 1 in MPEC 2020-A91 -- P/2019 Y2
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-A86 -- 458732, 30825, 6455
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-A91 -- P/2019 Y2
L01Visnjan Obs., 3 in MPECs 2020-A87, 2020-A90 & 2020-A91 -- 2020 AO2, 2020 AL2, P/2019 Y2
C51WISE in Earth polar orbit, 5 in MPEC 2020-A86 -- 2019 WP3, 2019 WF3, 2016 XH1, 18882, 162080
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2020-A86 -- 2019 YK4, 437316
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 AY1NEODyS1735R E M O V E D-
2020 AR1JPL Sentry1735R E M O V E DJPL: Risk listing removed at 1457 UTC today
NEODyS17352072-208926.94e-08-8.33-8.340NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2020-01-04.271 to 2020-01-07.382."
2020 AO1JPL Sentry17352049-204916.192e-08-6.18-6.180JPL: Computed at 07:08 today Pacific time based on 81 observations spanning 2.9890 days (2020-Jan-04.27153 to 2020-Jan-07.26048). Diameter approximately 0.062 km. from weighted mean H=23.68.
NEODyS17352049-205023.09e-08-6.49-6.490NEODyS: "Based on 81 optical observations (of which 0 are rejected as outliers) from 2020-01-04.272 to 2020-01-07.261."
2020 AC1JPL Sentry17352093-211784.22555e-06-7.44-7.910JPL: Computed at 06:47 today Pacific time based on 39 observations spanning 2.9910 days (2020-Jan-04.267512 to 2020-Jan-07.25855). Diameter approximately 0.007 km. from weighted mean H=28.40.
NEODyS17352093-2118145.45e-06-7.33-7.880NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2020-01-04.268 to 2020-01-07.259."
2019 YP3NEODyS17352095-211126.75e-08-7.92-7.950NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2019-12-27.534 to 2020-01-07.355."
2019 YW2JPL Sentry17352106-211933.3529e-07-6.27-6.550JPL: Computed at 06:37 today Pacific time based on 102 observations spanning 13.794 days (2019-Dec-24.513641 to 2020-Jan-07.3075). Diameter approximately 0.054 km. from weighted mean H=23.97.
NEODyS17352106-211531.18e-07-6.72-6.820NEODyS: "Based on 103 optical observations (of which 3 are rejected as outliers) from 2019-12-24.514 to 2020-01-07.308."
2019 YA2NEODyS1735210111.07e-08-7.01-7.010NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2019-12-20.486 to 2020-01-07.371."
2019 YV1JPL Sentry17352089-2114101.558373e-05-5.26-5.340JPL: Computed at 06:42 today Pacific time based on 74 observations spanning 17.178 days (2019-Dec-21.11125 to 2020-Jan-07.2892). Diameter approximately 0.033 km. from weighted mean H=25.06.
NEODyS17352089-2118141.62e-05-5.26-5.310NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2019-12-21.112 to 2020-01-07.290."

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 7 January '20

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

2300Grabbed MPEC 2020-A91 - Comet P/2019 Y2 (Fuls) - see above
2145Generated Traffic Report
1931Grabbed MPEC 2020-A87 - 2020 AL2 - see above
Grabbed MPEC 2020-A88 - 2020 AM2 - see above
Grabbed MPEC 2020-A89 - 2020 AN2 - see above
Grabbed MPEC 2020-A90 - 2020 AO2 - see above
1735Noted that NEODyS has updated its 2019 YA2 risk assessment - 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 reposted 2020 AO1 as an impact risk - see above
Noted that NEODyS has updated its 2020 AO1 risk assessment - see above
Noted that JPL Sentry has removed 2020 AR1 as an impact risk - see above
Noted that NEODyS has updated its 2020 AR1 risk assessment - see above
Noted that NEODyS has removed 2020 AY1 as an impact risk - see above
Grabbed MPEC 2020-A86 - Daily Orbit Update - see above