Contents  on 30 November '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 30 November '20

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 21 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 30 November '20

Minor Planet Electronic Circulars

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


MPEC 2020-W192 - "18:26 UT" - 2020 VZ6


MPEC 2020-W191 - "14:32 UT" - 2020 WN5


<< DOU on 30 November '20 >>  MPEC 2020-W190 - "12:11 UT" - Daily Orbit Update


MPEC 2020-W189 - "09:39 UT" - 2020 WM5


MPEC 2020-W188 - "09:37 UT" - 2020 WL5

Observers  on 30 November '20

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
U71AHS Obs., 1 in MPEC 2020-W190 -- 1036
T05ATLAS Haleakala in Hawaii, 24 in MPECs 2020-W190 & 2020-W192 -- 2020 WP, 2020 VZ6, 1999 VX15, 99907, 90075, 89355, 86039, 65717, 474554, 30825, 216707, 163014, 162173, 154302, 138852, 137032, 12538, 10150, 6053, 4503, 3908, 1981, 1036, 887
T08ATLAS Mauna Loa in Hawaii, 14 in MPEC 2020-W190 -- 2017 WJ16, 2017 VT12, 2004 AC, 2002 GZ8, 90147, 88188, 53435, 482505, 415029, 382625, 380359, 21374, 163902, 159402
G17BAS Obs., 2 in MPEC 2020-W190 -- 162173, 154302
160Castelmartini Obs. in Italy, 3 in MPEC 2020-W190 -- 99907, 90075, 474554
J042program code 2 via ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-W191 -- 2020 WN5
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2020-W188 & 2020-W192 -- 2020 WL5, 2020 VZ6
A17Guidestar Obs. in Germany, 6 in MPEC 2020-W190 -- 2020 WP4, 2020 WA5, 2020 ST1, 2018 XZ1, 2018 GX4, 2008 CZ118
240Herrenberg Obs. in Germany, 1 in MPEC 2020-W190 -- 154330
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-W190 -- 159402
D95Kurihara Obs. in Japan, 1 in MPEC 2020-W190 -- 162173
G96Mt. Lemmon Survey (MLS) in Arizona, 28 in MPECs 2020-W188, 2020-W189, 2020-W190 & 2020-W192 -- 2020 WT2, 2020 WN4, 2020 WM5, 2020 WL5, 2020 WH2, 2020 VZ6, 2020 TL10, 2019 AN5, 2017 GO6, 2012 XE17, 2007 TG8, 2003 YM1, 99935, 486001, 465749, 459386, 380128, 376848, 316695, 20460, 162186, 162039, 154658, 141052, 140333, 138859, 138175, 7753
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2020-W190 -- 2020 SO
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2020-W190, 2020-W191 & 2020-W192 -- 2020 WN5, 2020 VZ6, 154144, 153249, 10115
K63Pascoli Obs. in Italy, 1 in MPEC 2020-W188 -- 2020 WL5
C95SATINO-1 in France, 1 in MPEC 2020-W190 -- 4503
I52Steward Obs. Mt. Lemmon Station in Arizona, 7 in MPECs 2020-W188, 2020-W189, 2020-W190 & 2020-W191 -- 2020 WQ3, 2020 WN5, 2020 WM5, 2020 WM3, 2020 WL5, 2020 WL1, 2020 WJ4
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-W190 -- 2010 FT9
L01Visnjan Obs. in Croatia, 2 in MPECs 2020-W188 & 2020-W189 -- 2020 WM5, 2020 WL5
I41Zwicky Transient Facility (ZTF) in southern California, 3 in MPEC 2020-W190 -- 40267, 141053, 2329
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 November '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 WN5JPL Sentry17302055-21201426.43044183e-05-5.84-6.550JPL: Computed at 07:48 today Pacific time based on 8 observations spanning .99493 days (2020-Nov-17.335413 to 2020-Nov-18.330339). Diameter approximately 0.009 km. from weighted mean H=27.97.
2020 WL5JPL Sentry17302057-211491.611371e-07-5.04-5.310JPL: Computed at 03:58 today Pacific time based on 21 observations spanning 1.5556 days (2020-Nov-28.227603 to 2020-Nov-29.783203). Diameter approximately 0.200 km. from weighted mean H=21.19.
NEODyS17302090-210627.61e-08-5.36-5.380NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-11-28.228 to 2020-11-29.784."
2020 WG5NEODyS17302086-2120422.52e-04-5.22-5.35n/aNEODyS: "Based on 42 optical observations (of which 1 are rejected as outliers) from 2020-11-27.253 to 2020-11-28.305."
2020 WF5NEODyS17302082-2120331.15e-05-6.53-7.15n/aNEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2020-11-27.232 to 2020-11-28.355."
2020 VVJPL Sentry19002033-21111750.001710246878-3.86-4.180JPL: Computed at 10:14 today Pacific time based on 75 observations spanning 36.918 days (2020-Oct-17.214515 to 2020-Nov-23.13216). Diameter approximately 0.012 km. from weighted mean H=27.25.
2020 KSJPL Sentry17302055-207231.6146e-08-8.26-8.650JPL: Computed at 07:06 Aug. 21st Pacific time based on 132 observations spanning 43.768 days (2020-May-16.491732 to 2020-Jun-29.259248). Diameter approximately 0.024 km. from weighted mean H=25.79.
2016 XL23JPL Sentry17302080-209836.11473e-05-6.40-6.410JPL: Computed at 12:37 April 11th of 2017 Pacific time based on 16 observations spanning 1.1194 days (2016-Dec-01.42268 to 2016-Dec-02.54204). Diameter approximately 0.005 km. from weighted mean H=29.27.

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 30 November '20

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

1900Noted that JPL Sentry has updated its 2020 VV risk assessment - see above
Grabbed MPEC 2020-W192 - 2020 VZ6 - see above
1730Noted that JPL Sentry has updated its 2016 XL23 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KS risk assessment - see above
Noted that NEODyS has posted 2020 WF5 as an impact risk - see above
Noted that NEODyS has posted 2020 WG5 as an impact risk - see above
Noted that JPL Sentry has posted 2020 WL5 as an impact risk - see above
Noted that NEODyS has posted 2020 WL5 as an impact risk - see above
Noted that JPL Sentry has posted 2020 WN5 as an impact risk - see above
Grabbed MPEC 2020-W188 - 2020 WL5 - see above
Grabbed MPEC 2020-W189 - 2020 WM5 - see above
Grabbed MPEC 2020-W190 - Daily Orbit Update - see above
Grabbed MPEC 2020-W191 - 2020 WN5 - see above