Contents  on 23 October '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.

NEOCP Activity  on 23 October '20

The MPC's NEO Confirmation Page has 88 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 88 objects listed. Of these, 51 were "one nighters." So far The Tracking News has counted a total of 113 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 23 October '20

Minor Planet Electronic Circulars

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


MPEC 2020-U199 - "22:45 UT" - 2020 UL4


MPEC 2020-U198 - "22:10 UT" - Comet C/2020 T4 (Panstarrs)


MPEC 2020-U197 - "21:03 UT" - Comet P/2020 T3 (Panstarrs)


MPEC 2020-U196 - "18:45 UT" - 2020 UJ4


MPEC 2020-U195 - "18:43 UT" - 2020 UH4


MPEC 2020-U194 - "18:40 UT" - 2020 UG4


MPEC 2020-U193 - "16:18 UT" - 2020 UE4


MPEC 2020-U192 - "16:16 UT" - 2020 UD4


MPEC 2020-U191 - "16:11 UT" - 2020 UC4


<< DOU on 23 October '20 >>  MPEC 2020-U190 - "12:02 UT" - Daily Orbit Update


MPEC 2020-U189 - "11:45 UT" - 2018 VJ1


MPEC 2020-U188 - "11:42 UT" - 2020 UB4


MPEC 2020-U187 - "11:40 UT" - 2020 UA4


MPEC 2020-U186 - "11:39 UT" - 2020 UZ3


MPEC 2020-U185 - "05:32 UT" - 2020 UY3


MPEC 2020-U184 - "05:30 UT" - 2020 UX3


MPEC 2020-U183 - "05:29 UT" - 2020 UW3


MPEC 2020-U182 - "02:54 UT" - Comet P/2011 U2 = 2020 M6 (Bressi)

Observers  on 23 October '20

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2020-U185, 2020-U186, 2020-U187, 2020-U188, 2020-U189, 2020-U190, 2020-U191 & 2020-U192 -- 2020 UZ3, 2020 UY3, 2020 UX3, 2020 UD4, 2020 UC4, 2020 UB4, 2020 UA4, 2020 SO, 2018 VJ1
T05ATLAS Haleakala in Hawaii, 13 in MPEC 2020-U190 -- 2020 SR7, 2016 ED85, 2012 SA22, 2005 JT108, 2002 GZ8, 1998 WA2, 428086, 418797, 376848, 163902, 162173, 159402, 144411
T08ATLAS Mauna Loa in Hawaii, 28 in MPECs 2020-U190 & 2020-U194 -- 2020 UG4, 2020 RV5, 2020 QU6, 2013 PY6, 2000 TU28, 96744, 88264, 69230, 68359, 65717, 513125, 380455, 316695, 274138, 23183, 209924, 19764, 163081, 159856, 145656, 11398, 5645, 5587, 5143, 3753, 3691, 3671, 1036
Z842E. Schwab via Calar Alto Schmidt in Spain, 1 in MPEC 2020-U197 -- P/2020 T3
160Castelmartini Obs. in Italy, 2 in MPEC 2020-U190 -- 2020 PC5, 459386
703Catalina Sky Survey (CSS) in Arizona, 36 in MPECs 2020-U186, 2020-U190 & 2020-U194 -- 2020 UZ3, 2020 UG4, 2020 TR2, 2020 TD8, 2020 SO, 2020 RV5, 2020 QU6, 2020 PD1, 2020 PC5, 2020 LB3, 2016 HL, 2009 UM, 2006 HY5, 2004 LU3, 2000 TU28, 96744, 88264, 87684, 69230, 68359, 480824, 345705, 304293, 27002, 256412, 159856, 15817, 152978, 145656, 140158, 5645, 5587, 5143, 4055, 3671, 887
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2020-U195 -- 2020 UH4
958Dax Obs. in France, 1 in MPEC 2020-U185 -- 2020 UY3
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2020-U190 -- 2014 UR116
J042program code 2 via ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2020-U190 & 2020-U197 -- 2020 UV1, P/2020 T3
E10*program code "*" (19) via Faulkes Telescope South in New South Wales, 1 in MPEC 2020-U197 -- P/2020 T3
K88GINOP-KHK in Hungary, 4 in MPECs 2020-U190 & 2020-U194 -- 2020 UG4, 2020 TG4, 2007 UY1, 2002 GZ8
J95Great Shefford Obs. in England, 2 in MPECs 2020-U190 & 2020-U199 -- 2020 UL4, 2020 UF3
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-U198 -- C/2020 T4
2461program code 1 via KLENOT in the Czech Republic, 1 in MPEC 2020-U185 -- 2020 UY3
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-U190 -- 159402
Z43Landehen Obs., 4 in MPEC 2020-U190 -- 2020 SR7, 2008 UU95, 2007 VX137, 420302
W92MASTER OAFA Obs., 1 in MPEC 2020-U190 -- 2020 PC5
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2020-U197 & 2020-U198 -- C/2020 T4, P/2020 T3
711McDonald Obs. in Texas, 1 in MPEC 2020-U197 -- P/2020 T3
G96Mt. Lemmon Survey (MLS) in Arizona, 54 in MPECs 2020-U183, 2020-U184, 2020-U185, 2020-U186, 2020-U187, 2020-U188, 2020-U189, 2020-U190, 2020-U191, 2020-U192, 2020-U193, 2020-U196, 2020-U197, 2020-U198 & 2020-U199 -- 2020 UZ3, 2020 UY3, 2020 UX3, 2020 UW3, 2020 UV3, 2020 UU3, 2020 UU2, 2020 UQ1, 2020 UL4, 2020 UJ4, 2020 UE4, 2020 UE, 2020 UD4, 2020 UC4, 2020 UB4, 2020 UA4, 2020 TM4, 2020 TJ4, 2020 TD8, C/2020 T4, P/2020 T3, 2020 SW2, 2020 SQ2, 2020 SO, 2020 RP4, 2020 RB, 2020 QA7, 2018 VJ1, 2017 XA1, 2016 VR5, 2015 PZ228, 2014 UR116, 2013 TB6, 2012 US9, 2012 SH32, 2011 GO27, 2010 CW180, 2003 QQ10, 2002 GZ8, 2002 AR129, 1998 VD32, 88188, 452307, 39572, 381181, 283729, 16834, 162269, 155140, 144411, 141056, 138947, 10115, 8507
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-U190 -- 2020 UV
F51Pan-STARRS 1 (PS1) in Hawaii, 41 in MPECs 2020-U182, 2020-U183, 2020-U186, 2020-U187, 2020-U190, 2020-U192, 2020-U193, 2020-U195, 2020-U197 & 2020-U198 -- 2020 UZ3, 2020 UW3, 2020 UQ2, 2020 UH4, 2020 UE4, 2020 UD4, 2020 UA4, 2020 TD8, C/2020 T4, P/2020 T3, 2020 SV3, 2020 SC1, 2020 RR3, 2020 KR7, 2019 YV, 2019 BO1, 2018 GX4, 2018 FZ1, 2016 CB32, 2013 VZ9, 2012 XE17, 2012 US9, P/2011 U2, 2006 RJ1, 545274, 52761, 508767, 464885, 438902, 416694, 380321, 26817, 26310, 243147, 213053, 198752, 162472, 154007, 140928, 137099, 8014
F52Pan-STARRS 2 (PS2) in Hawaii, 37 in MPECs 2020-U182, 2020-U187, 2020-U190, 2020-U194, 2020-U197 & 2020-U198 -- 2020 UN1, 2020 UG4, 2020 UE, 2020 UA4, 2020 TU1, C/2020 T4, P/2020 T3, 2020 SW2, 2020 SV3, 2020 SU2, 2020 SR7, 2020 SL, 2020 SC1, 2020 RX3, 2020 RW2, 2020 RP4, 2020 QS, 2020 OA2, 2017 BK92, 2014 LQ26, 2013 VZ9, 2012 US9, P/2011 U2, 2010 TU5, 2007 SR1, 1998 MR24, 99799, 55532, 477465, 448972, 373579, 194126, 154302, 6239, 5587, 2212, 1943
B49Paus Obs. in Spain, 2 in MPECs 2020-U196 & 2020-U199 -- 2020 UL4, 2020 UJ4
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2020-U190 -- 2020 ST1, 2020 QU6, 2004 QD17
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2020-U198 -- C/2020 T4
W16Pleasant Groves Obs., 1 in MPEC 2020-U182 -- P/2011 U2
654Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2020-U190 -- 2020 UT3
D29Purple Mtn. Obs. Xuyi Station in China, 3 in MPEC 2020-U190 -- 2016 CB32, 505667, 401954
L07Salvatore di Giacomo Obs., 1 in MPEC 2020-U198 -- C/2020 T4
C95SATINO-1 in France, 2 in MPECs 2020-U190 & 2020-U198 -- C/2020 T4, 2006 UE17
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2020-U190 -- 2017 XS2, 2015 SY, 2008 EL
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2020-U185 & 2020-U190 -- 2020 UY3, 2020 UO3
I52Steward Obs. Mt. Lemmon Station in Arizona, 37 in MPECs 2020-U184, 2020-U185, 2020-U186, 2020-U187, 2020-U188, 2020-U189, 2020-U190, 2020-U191, 2020-U192, 2020-U196, 2020-U198 & 2020-U199 -- 2020 UZ3, 2020 UZ1, 2020 UZ, 2020 UY3, 2020 UX3, 2020 UX1, 2020 US2, 2020 UR1, 2020 UQ1, 2020 UN, 2020 UM1, 2020 UL4, 2020 UL3, 2020 UK3, 2020 UJ4, 2020 UH, 2020 UF2, 2020 UE1, 2020 UE, 2020 UD4, 2020 UC4, 2020 UB4, 2020 UB2, 2020 UB1, 2020 UA4, 2020 UA2, 2020 UA1, 2020 TV6, 2020 TS4, 2020 TQ6, 2020 TM7, 2020 TK5, 2020 TK4, 2020 TF, C/2020 T4, 2020 OK7, 2018 VJ1
858Tebbutt Obs. in New Mexico, 2 in MPECs 2020-U188 & 2020-U196 -- 2020 UJ4, 2020 UB4
L01Visnjan Obs. in Croatia, 9 in MPECs 2020-U184, 2020-U185, 2020-U186, 2020-U187, 2020-U188, 2020-U191, 2020-U192, 2020-U197 & 2020-U198 -- 2020 UZ3, 2020 UY3, 2020 UX3, 2020 UD4, 2020 UC4, 2020 UB4, 2020 UA4, C/2020 T4, P/2020 T3
I41Zwicky Transient Facility (ZTF) in southern California, 15 in MPEC 2020-U190 -- 2020 ST1, 2020 QU6, 2020 QE4, 2020 OG4, 68359, 415029, 283729, 216707, 20460, 162173, 15817, 143624, 140288, 137062, 2212
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 October '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 UC4JPL Sentry18002120-212018.738e-08-8.02-8.020JPL: Computed at 10:43 today Pacific time based on 17 observations spanning 1.1266 days (2020-Oct-22.341905 to 2020-Oct-23.468493). Diameter approximately 0.020 km. from weighted mean H=26.15.
2020 UL3NEODyS22002111-2120226.53e-06-4.71-4.89n/aNEODyS: "Based on 26 optical observations (of which 1 are rejected as outliers) from 2020-10-17.537 to 2020-10-23.439."
JPL Sentry17002107-2119126.4826147e-06-4.71-4.880JPL: Computed at 09:27 today Pacific time based on 26 observations spanning 5.9020 days (2020-Oct-17.535831 to 2020-Oct-23.437852). Diameter approximately 0.075 km. from weighted mean H=23.28.
2020 UK2NEODyS17002075-2109112.36e-05-5.92-6.080NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2020-10-18.184 to 2020-10-22.433."
2020 UJNEODyS1700R E M O V E D-
2020 UHNEODyS22002098-211947.62e-07-6.17-6.240NEODyS #2 for the day: "Based on 54 optical observations (of which 2 are rejected as outliers) from 2020-10-15.309 to 2020-10-23.151."
JPL Sentry17002098-211935.2388e-07-6.29-6.500JPL: Computed at 09:21 today Pacific time based on 54 observations spanning 7.8414 days (2020-Oct-15.308398 to 2020-Oct-23.149798). Diameter approximately 0.044 km. from weighted mean H=24.43.
2020 UENEODyS22002042-2120472.61e-05-4.83-5.31n/aNEODyS #2 for the day: "Based on 122 optical observations (of which 0 are rejected as outliers) from 2020-10-15.470 to 2020-10-23.263."
JPL Sentry17002061-2118232.320704e-05-4.88-5.410JPL: Computed at 09:27 today Pacific time based on 122 observations spanning 7.7922 days (2020-Oct-15.46967 to 2020-Oct-23.261907). Diameter approximately 0.026 km. from weighted mean H=25.56.
2020 UANEODyS17002065-2114102.22e-06-7.51-7.790NEODyS: "Based on 79 optical observations (of which 6 are rejected as outliers) from 2020-10-16.316 to 2020-10-20.967."
2020 TD8NEODyS22002045-2096241.79e-05-5.69-5.940NEODyS #2 for the day: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2020-10-15.323 to 2020-10-23.361."
JPL Sentry17002045-2096131.048692e-05-5.86-5.970JPL: Computed at 09:11 today Pacific time based on 36 observations spanning 8.0373 days (2020-Oct-15.322434 to 2020-Oct-23.359715). Diameter approximately 0.013 km. from weighted mean H=27.04.
2020 TK5JPL Sentry17002039-205661.112268e-05-3.86-3.980JPL: Computed at 09:22 today Pacific time based on 77 observations spanning 8.8762 days (2020-Oct-14.331481 to 2020-Oct-23.207689). Diameter approximately 0.065 km. from weighted mean H=23.59.
2020 TY4NEODyS17002086-211182.69e-06-5.38-5.740NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2020-10-13.139 to 2020-10-22.188."
2020 TS4JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1611 UTC today
2020 TJ3NEODyS17002056-2120668.32e-05-4.09-4.6n/aNEODyS: "Based on 53 optical observations (of which 1 are rejected as outliers) from 2020-10-11.172 to 2020-10-22.148."
2020 TY1NEODyS17002092-2120115.31e-07-5.37-5.94n/aNEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2020-10-08.411 to 2020-10-21.437."
2020 RR4NEODyS1700R E M O V E D-
2019 UW7JPL Sentry17002081-208112.226e-08-8.89-8.890JPL: Computed at 05:55 Nov. 4th of 2019 Pacific time based on 74 observations spanning 9.0268 days (2019-Oct-26.355283 to 2019-Nov-04.38206). Diameter approximately 0.012 km. from weighted mean H=27.29.
2018 XQ2NEODyS17002064-21201229.56e-04-4.93-5.56n/aNEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2018-12-10.243 to 2019-01-07.068."
2017 UQ7JPL Sentry17002096-209614.016e-08-7.59-7.590JPL: Computed at 10:01 April 18th of 2019 Pacific time based on 58 observations spanning 16.000 days (2017-Oct-26.21101 to 2017-Nov-11.21143). Diameter approximately 0.031 km. from weighted mean H=25.17.
2008 UM1JPL Sentry17002021-207375.35401e-07-7.64-7.680JPL: Computed at 15:22 April 7th of 2017 Pacific time based on 9 observations spanning .03061 days (2008-Oct-22.39434 to 2008-Oct-22.42495). Diameter approximately 0.002 km. from weighted mean H=31.60.

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 23 October '20

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

2307Grabbed MPEC 2020-U198 - Comet C/2020 T4 (Panstarrs) - see above
Grabbed MPEC 2020-U199 - 2020 UL4 - see above
2200Noted that NEODyS has updated its 2020 TD8 risk assessment - see above
Noted that NEODyS has updated its 2020 UE risk assessment - see above
Noted that NEODyS has updated its 2020 UH risk assessment - see above
Noted that NEODyS has updated its 2020 UL3 risk assessment - see above
Grabbed MPEC 2020-U197 - Comet P/2020 T3 (Panstarrs) - see above
1900Grabbed MPEC 2020-U194 - 2020 UG4 - see above
Grabbed MPEC 2020-U195 - 2020 UH4 - see above
Grabbed MPEC 2020-U196 - 2020 UJ4 - see above
1800Noted that JPL Sentry has posted 2020 UC4 as an impact risk - see above
1700Noted that JPL Sentry has updated its 2008 UM1 risk assessment - see above
Noted that JPL Sentry has updated its 2017 UQ7 risk assessment - see above
Noted that NEODyS has updated its 2018 XQ2 risk assessment - see above
Noted that JPL Sentry has updated its 2019 UW7 risk assessment - see above
Noted that NEODyS has removed 2020 RR4 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 TD8 risk assessment - see above
Noted that NEODyS has updated its 2020 TD8 risk assessment - see above
Noted that NEODyS has updated its 2020 TJ3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 TK5 risk assessment - see above
Noted that JPL Sentry has removed 2020 TS4 as an impact risk - see above
Noted that NEODyS has updated its 2020 TY1 risk assessment - see above
Noted that NEODyS has updated its 2020 TY4 risk assessment - see above
Noted that NEODyS has updated its 2020 UA risk assessment - see above
Noted that JPL Sentry has updated its 2020 UE risk assessment - see above
Noted that NEODyS has updated its 2020 UE risk assessment - see above
Noted that JPL Sentry has updated its 2020 UH risk assessment - see above
Noted that NEODyS has updated its 2020 UH risk assessment - see above
Noted that NEODyS has removed 2020 UJ as an impact risk - see above
Noted that NEODyS has updated its 2020 UK2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 UL3 risk assessment - see above
Grabbed MPEC 2020-U183 - 2020 UW3 - see above
Grabbed MPEC 2020-U184 - 2020 UX3 - see above
Grabbed MPEC 2020-U185 - 2020 UY3 - see above
Grabbed MPEC 2020-U186 - 2020 UZ3 - see above
Grabbed MPEC 2020-U187 - 2020 UA4 - see above
Grabbed MPEC 2020-U188 - 2020 UB4 - see above
Grabbed MPEC 2020-U189 - 2018 VJ1 - see above
Grabbed MPEC 2020-U190 - Daily Orbit Update - see above
Grabbed MPEC 2020-U191 - 2020 UC4 - see above
Grabbed MPEC 2020-U192 - 2020 UD4 - see above
Grabbed MPEC 2020-U193 - 2020 UE4 - see above
0430Grabbed MPEC 2020-U182 - Comet P/2011 U2 = 2020 M6 (Bressi) - see above