Contents  on 26 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.

Radar Astrometry  on 26 October '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1700 UTC when the database was dated 26 Oct.



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 26 October '20

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 63 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 26 October '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-U240 - "18:52 UT" - 2020 UE6


MPEC 2020-U239 - "17:02 UT" - 2020 CM3


MPEC 2020-U238 - "16:58 UT" - 2020 UD6


MPEC 2020-U237 - "16:56 UT" - 2020 UC6


<< DOU on 26 October '20 >>  MPEC 2020-U236 - "12:07 UT" - Daily Orbit Update


MPEC 2020-U235 - "00:59 UT" - 2020 UZ5


MPEC 2020-U234 - "00:58 UT" - 2020 UY5


MPEC 2020-U233 - "00:57 UT" - 2020 UX5


MPEC 2020-U232 - "00:56 UT" - 2020 UW5

Observers  on 26 October '20

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
T05ATLAS Haleakala in Hawaii, 46 in MPEC 2020-U236 -- 2020 UN1, 2020 TR5, 2020 ST1, 2020 SR7, 2020 RV5, 2020 QM4, 2017 GO6, 2016 CB32, 2015 BF4, 2014 UR116, 2013 UX14, 2013 PY6, 2008 UU95, 2007 VX137, 2007 UY1, 2003 UG22, 2002 GZ8, 2001 SG286, 2000 PQ27, 89355, 85804, 65717, 53435, 474179, 420302, 414903, 414586, 376848, 27031, 241596, 219021, 21374, 21088, 194126, 16834, 162173, 154302, 140333, 9058, 8014, 6239, 5836, 4450, 2368, 2212, 1580
T08ATLAS Mauna Loa in Hawaii, 19 in MPEC 2020-U236 -- 2020 TR2, 2020 PD1, 2016 NV38, 2004 LU3, 2000 TU28, 88264, 87684, 517103, 480824, 380929, 304293, 216707, 159856, 15817, 152978, 5879, 4953, 4055, 887
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2020-U233, 2020-U234, 2020-U235 & 2020-U236 -- 2020 UZ5, 2020 UY5, 2020 UX5, 2020 UG2, 2020 RS4, 2020 RR2, 2020 RM2
Z99Clixby Obs. in England, 1 in MPEC 2020-U236 -- 2020 UU4
G373program code 3 via Discovery Channel Telescope in Arizona, 1 in MPEC 2020-U239 -- 2020 CM3
J043program code 3 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-U236 -- 4503
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 159402
J95Great Shefford Obs. in England, 7 in MPECs 2020-U233, 2020-U234 & 2020-U236 -- 2020 UY5, 2020 UX5, 2020 UU4, 2020 UJ4, 2020 UJ3, 2020 UC4, 2020 TD8
L52MASTER Tavrida, 1 in MPEC 2020-U236 -- 433
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2020-U236 -- 2020 PC5
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2020-U232, 2020-U233, 2020-U234 & 2020-U238 -- 2020 UY5, 2020 UX5, 2020 UW5, 2020 UD6
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-U236 -- 2004 US1
F51Pan-STARRS 1 (PS1) in Hawaii, 35 in MPECs 2020-U232, 2020-U235, 2020-U236, 2020-U237 & 2020-U240 -- 2020 UZ5, 2020 UZ, 2020 UW5, 2020 UR1, 2020 UK5, 2020 UE6, 2020 UC6, 2020 UA3, 2020 TN6, 2020 SW2, 2020 SV6, 2020 SV3, 2020 SH6, 2020 SC1, 2020 QM4, 2020 OK5, 2020 OA2, 2020 LF1, 2010 RC12, 2006 SA6, 2006 RJ1, 1998 MR24, 89136, 85867, 85804, 53430, 505019, 447903, 38091, 36284, 26310, 190119, 154007, 143404, 8014
F52Pan-STARRS 2 (PS2) in Hawaii, 16 in MPECs 2020-U232, 2020-U236, 2020-U238 & 2020-U240 -- 2020 UW5, 2020 UE6, 2020 UD6, 2020 ST1, 2020 SR7, 2020 SC1, 2020 RZ9, 2020 QM4, 2020 PX4, 2020 OA2, 2012 UM68, 2010 RC12, 2007 XB10, 2001 SG286, 283729, 144411
W16Pleasant Groves Obs., 1 in MPEC 2020-U236 -- 2020 RM6
C95SATINO-1 in France, 1 in MPEC 2020-U236 -- 2007 SR1
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2020-U236 -- 2018 VP6, 2018 TK2, 2009 WB105
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-U236 -- 153249
I52Steward Obs. Mt. Lemmon Station in Arizona, 5 in MPECs 2020-U233, 2020-U234 & 2020-U236 -- 2020 UY5, 2020 UX5, 2020 SK3, 2020 RP6, 2020 RA7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-U236 -- 2018 PJ21
L70Zvjezdarnica Graberje, 1 in MPEC 2020-U236 -- 2002 GZ8
I41Zwicky Transient Facility (ZTF) in southern California, 28 in MPEC 2020-U236 -- 2020 UN3, 2020 QA7, 2019 AQ3, 2005 SH26, 2002 TS67, 88264, 85804, 85182, 53430, 480824, 465749, 435404, 415029, 380359, 354663, 283729, 209924, 163902, 153953, 12711, 12538, 11398, 7350, 5587, 5131, 3199, 1943, 1580
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 October '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 UC4JPL Sentry17002113-211841.16424e-07-7.85-7.990JPL: Computed at 07:40 today Pacific time based on 24 observations spanning 3.7371 days (2020-Oct-22.341905 to 2020-Oct-26.078956). Diameter approximately 0.021 km. from weighted mean H=26.09.
NEODyS17002084-212099.94e-07-6.92-7.26n/aNEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-10-22.343 to 2020-10-26.080."
2020 UA3JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1457 UTC today
NEODyS1700211415.74e-09-9.55-9.550NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2020-10-15.583 to 2020-10-25.534."
2020 TD8JPL Sentry17002045-2107211.194256e-05-5.81-5.990JPL: Computed at 07:37 today Pacific time based on 53 observations spanning 10.478 days (2020-Oct-15.322434 to 2020-Oct-25.800839). Diameter approximately 0.014 km. from weighted mean H=26.96.
NEODyS17002045-2113361.42e-05-5.78-6.040NEODyS: "Based on 53 optical observations (of which 1 are rejected as outliers) from 2020-10-15.323 to 2020-10-25.802."
2018 VP6JPL Sentry17002088-208823.15e-06-6.67-6.900JPL: Computed at 07:29 today Pacific time based on 34 observations spanning 9.1919 days (2018-Nov-10.2782 to 2018-Nov-19.47006). Diameter approximately 0.013 km. from weighted mean H=27.16.
NEODyS17002088-211863.49e-06-6.65-6.950NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2018-11-10.279 to 2018-11-19.471."
2011 UL169JPL Sentry17002057-206651.2930323e-05-6.41-6.460JPL: Computed at 16:00 April 9th of 2017 Pacific time based on 26 observations spanning 3.9809 days (2011-Oct-27.2919 to 2011-Oct-31.27277). Diameter approximately 0.007 km. from weighted mean H=28.28.
2005 GQ33JPL Sentry17002023-2110242.7834e-08-6.59-7.360JPL: Computed at 15:01 April 10th of 2017 Pacific time based on 16 observations spanning .71055 days (2005-Apr-06.32956 to 2005-Apr-07.04011). Diameter approximately 0.063 km. from weighted mean H=23.66.
2002 UV36JPL Sentry17002087-208716.979e-06-6.20-6.200JPL: Computed at 16:02 April 8th of 2017 Pacific time based on 32 observations spanning 14.341 days (2002-Oct-31.18124 to 2002-Nov-14.52235). Diameter approximately 0.016 km. from weighted mean H=26.67.

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 26 October '20

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

2100Grabbed MPEC 2020-U240 - 2020 UE6 - see above
1711Grabbed MPEC 2020-U239 - 2020 CM3 - see above
1700Noted that JPL Sentry has updated its 2002 UV36 risk assessment - see above
Noted that JPL Sentry has updated its 2005 GQ33 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UL169 risk assessment - see above
Noted that JPL Sentry has updated its 2018 VP6 risk assessment - see above
Noted that NEODyS has updated its 2018 VP6 risk assessment - 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 JPL Sentry has removed 2020 UA3 as an impact risk - see above
Noted that NEODyS has posted 2020 UA3 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 UC4 risk assessment - see above
Noted that NEODyS has updated its 2020 UC4 risk assessment - see above
Grabbed MPEC 2020-U236 - Daily Orbit Update - see above
Grabbed MPEC 2020-U237 - 2020 UC6 - see above
Grabbed MPEC 2020-U238 - 2020 UD6 - see above
Noted Radar Astrometry database update - see above
0500Grabbed MPEC 2020-U232 - 2020 UW5 - see above
Grabbed MPEC 2020-U233 - 2020 UX5 - see above
Grabbed MPEC 2020-U234 - 2020 UY5 - see above
Grabbed MPEC 2020-U235 - 2020 UZ5 - see above