Contents  on 6 December '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 6 December '20

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, 32 were "one nighters." So far The Tracking News has counted a total of 62 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 6 December '20

Minor Planet Electronic Circulars

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


MPEC 2020-X33 - "19:07 UT" - 2020 XO


MPEC 2020-X32 - "19:06 UT" - 2020 XN


MPEC 2020-X31 - "19:04 UT" - 2020 XM


<< DOU on 6 December '20 >>  MPEC 2020-X30 - "12:14 UT" - Daily Orbit Update


MPEC 2020-X29 - "10:26 UT" - 2020 XL


MPEC 2020-X28 - "10:24 UT" - 2020 XK


MPEC 2020-X27 - "10:21 UT" - 2020 WV5


MPEC 2020-X26 - "08:40 UT" - 2018 XU3


MPEC 2020-X25 - "06:50 UT" - 2003 WJ98


MPEC 2020-X24 - "04:26 UT" - 2020 XJ


MPEC 2020-X23 - "04:24 UT" - 2015 XB

Observers  on 6 December '20

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
M46Althuraya Astronomy Ctr., 1 in MPEC 2020-X30 -- 153201
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2020-X23, 2020-X24, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X31, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XM, 2020 XL, 2020 XK, 2020 XJ, 2020 XH, 2020 XF, 2020 WW, 2020 WV5, 2020 VV1, 2020 VP, 2020 VE3, 2020 VD4, 2020 VC7, 2020 UT6, 2020 UR4, 2020 UK5, 2020 TN6, 2020 PX4, 2020 OA2, 2018 FZ1, 2015 XB, 2012 UR136, 2009 JK1, 2006 HB
T08ATLAS Mauna Loa in Hawaii, 3 in MPEC 2020-X30 -- 2020 VC7, 4179, 1981
L54Berthelot Obs., 2 in MPEC 2020-X30 -- 85628, 539940
V00Bok Telescope in Arizona, 11 in MPECs 2020-X27, 2020-X30, 2020-X31 & 2020-X33 -- 2020 XO, 2020 XM, 2020 XG, 2020 WV5, 2020 UD, 2016 LY47, 2016 AU65, 2009 KK, 380321, 199145, 153220
160Castelmartini Obs. in Italy, 13 in MPEC 2020-X30 -- 2020 TG4, 2020 ST1, 2013 UX14, 2002 TS67, 89355, 66272, 513125, 465749, 435404, 283729, 241596, 162039, 138947
703Catalina Sky Survey (CSS) in Arizona, 17 in MPECs 2020-X30 & 2020-X32 -- 2020 XN, 2009 WD11, 2004 AC, 66272, 482505, 428086, 380359, 36284, 16834, 163364, 154330, 152978, 144411, 10115, 8014, 5836, 2212
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 26 in MPECs 2020-X23, 2020-X27, 2020-X29, 2020-X30 & 2020-X31 -- 2020 XM, 2020 XL, 2020 WY2, 2020 WV5, 2020 WU2, 2020 WH1, 2020 WG1, 2020 WB5, 2020 VM6, 2020 VE3, 2020 VE2, 2020 VE, 2020 VC5, 2020 VA6, 2020 UT6, 2020 UK5, 2020 UF5, 2020 TX, 2020 TP3, 2020 TC1, 2020 RX3, 2020 QP6, 2020 LD3, 2018 CG2, 2015 XB, 2013 XZ21
Z99Clixby Obs. in England, 1 in MPEC 2020-X33 -- 2020 XO
U55Golden Ears Obs., 2 in MPEC 2020-X30 -- 88188, 53435
J95Great Shefford Obs. in England, 1 in MPEC 2020-X30 -- 2020 XF
P87Hirao Obs., 1 in MPEC 2020-X30 -- 162173
221IAS Obs. Hakos in Namibia, 1 in MPEC 2020-X30 -- 1943
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-X30 -- 159402
V01Mountainville Obs. in Utah, 2 in MPECs 2020-X30 & 2020-X32 -- 2020 XN, 2020 WE5
G96Mt. Lemmon Survey (MLS) in Arizona, 50 in MPECs 2020-X23, 2020-X24, 2020-X25, 2020-X26, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X31 & 2020-X32 -- 2020 XN, 2020 XM, 2020 XL, 2020 XK, 2020 XJ, 2020 WZ4, 2020 WV5, 2020 WB2, 2020 VQ6, 2020 VQ3, 2020 UU3, 2020 TG4, 2020 QQ6, 2020 LB3, 2018 XU3, 2018 TS5, 2017 AF5, 2016 ED85, 2015 XB, 2015 BF4, 2012 LD1, 2011 GO27, 2010 WF3, 2010 UF7, 2007 VX137, 2004 UR1, 2003 WJ98, 1999 HV1, 525484, 486001, 480823, 420302, 414960, 351331, 319988, 303262, 275611, 262623, 237551, 23183, 202435, 153306, 143404, 138852, 8037, 8014, 5131, 4486, 2212, 1862
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-X30 -- 2020 XH
F51Pan-STARRS 1 (PS1) in Hawaii, 29 in MPECs 2020-X25, 2020-X26, 2020-X30 & 2020-X31 -- 2020 XM, 2020 WG, 2020 UK5, 2020 TM4, 2020 RU, 2020 QM4, 2018 XU3, 2016 NF, 2011 BF59, 2009 TK12, 2009 KK8, 2003 WJ98, 2000 PQ27, 96744, 510190, 443972, 435302, 415027, 414960, 380929, 303262, 145656, 143624, 140158, 10115, 6455, 3908, 3691, 3288
F52Pan-STARRS 2 (PS2) in Hawaii, 21 in MPECs 2020-X26, 2020-X28, 2020-X30 & 2020-X33 -- 2020 XO, 2020 XK, 2020 TH5, 2018 XU3, 2016 OP5, 2013 PY6, 2007 TZ18, 1998 WA2, 495511, 452307, 413002, 380929, 373579, 315020, 27002, 19764, 17182, 163692, 10115, 4947, 4688
L04ROASTERR-1 in Romania, 2 in MPECs 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN
H36Sandlot Obs. in Kansas, 1 in MPEC 2020-X24 -- 2020 XJ
C95SATINO-1 in France, 1 in MPEC 2020-X30 -- 7025
0948program code 8 via Simeis Obs. in Ukraine, 1 in MPEC 2020-X30 -- 2002 GZ8
W88!W.F. Cashwell in Nevada via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-X30 -- 275714
691Spacewatch 0.9m telescope in Arizona, 12 in MPECs 2020-X28, 2020-X30, 2020-X31 & 2020-X32 -- 2020 XN, 2020 XM, 2020 XK, 2020 VZ5, 2020 VX5, 2020 VX1, 2020 SO, 2015 LK21, 2010 OL100, 2006 RJ1, 2003 WJ98, 194126
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2020-X27 & 2020-X30 -- 2020 WZ3, 2020 WV5, 2020 WQ3, 2020 WP, 2020 VZ6, 2020 VY1, 2020 VE, 2020 TH5, 2017 XQ60, 2012 UK171
W34Squirrel Valley Obs. in North Carolina, 3 in MPECs 2020-X24, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XJ
I52Steward Obs. Mt. Lemmon Station in Arizona, 60 in MPECs 2020-X23, 2020-X24, 2020-X25, 2020-X27, 2020-X28, 2020-X29, 2020-X30, 2020-X32 & 2020-X33 -- 2020 XO, 2020 XN, 2020 XL, 2020 XK, 2020 XJ, 2020 XC, 2020 WZ4, 2020 WY, 2020 WW4, 2020 WV5, 2020 WV4, 2020 WS5, 2020 WS2, 2020 WQ3, 2020 WQ1, 2020 WP4, 2020 WO3, 2020 WM5, 2020 WL5, 2020 WK3, 2020 WG, 2020 WF3, 2020 WF2, 2020 WE4, 2020 WE3, 2020 WE2, 2020 WD1, 2020 WC3, 2020 WB2, 2020 WA5, 2020 VZ5, 2020 VY1, 2020 VX5, 2020 VX1, 2020 VU4, 2020 VT, 2020 VQ6, 2020 VQ3, 2020 VM3, 2020 VK1, 2020 UR6, 2020 UL1, 2020 UJ6, 2020 TQ7, 2020 TN7, 2020 TJ8, 2020 TG3, 2020 SO, 2020 SK18, 2020 QU6, 2020 QA7, 2020 PC5, 2020 OK5, 2020 OC8, 2020 ME5, 2020 HD6, 2020 FT1, 2018 XU3, 2015 XB, 2003 WJ98
I41Zwicky Transient Facility (ZTF) in southern California, 9 in MPEC 2020-X30 -- 2020 RU, 88188, 68359, 505093, 345705, 303262, 21374, 20460, 152978
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 December '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 XGNEODyS19002081-21201427.55e-05-5.89-6.6n/aNEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-12-04.338 to 2020-12-06.399."
JPL Sentry17352081-2120668.83781358e-05-5.81-6.390JPL: Computed at 06:23 today Pacific time based on 21 observations spanning 2.0612 days (2020-Dec-04.336897 to 2020-Dec-06.3981). Diameter approximately 0.008 km. from weighted mean H=28.09.
2020 XFNEODyS19002056-21206067.13e-04-4.19-4.48n/aNEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2020-12-04.328 to 2020-12-06.051."
JPL Sentry17352056-21191350.000368628446-4.51-5.140JPL: Computed at 06:26 today Pacific time based on 40 observations spanning 1.7236 days (2020-Dec-04.32683 to 2020-Dec-06.050446). Diameter approximately 0.016 km. from weighted mean H=26.65.
2020 XENEODyS19002040-206357.39e-06-4.89-4.90NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2020-12-04.398 to 2020-12-05.296."
2020 XCNEODyS19002075-209435.49e-07-8.55-8.560NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2020-12-03.363 to 2020-12-06.114."
JPL Sentry17352075-208525.68e-07-8.51-8.570JPL: Computed at 06:26 today Pacific time based on 35 observations spanning 2.7505 days (2020-Dec-03.36221 to 2020-Dec-06.112705). Diameter approximately 0.005 km. from weighted mean H=29.01.
2020 WG5NEODyS19002086-2120332.65e-04-5.20-5.31n/aNEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2020-11-27.253 to 2020-12-05.278."
2020 WF5NEODyS19002082-2118351.03e-05-6.59-7.350NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-11-27.232 to 2020-12-05.445."
2020 WT4NEODyS19002068-2119126.96e-06-6.86-7.120NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2020-11-24.191 to 2020-12-05.120."
2020 WZ3NEODyS19002101-2119118.45e-06-6.05-6.470NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-11-23.353 to 2020-12-06.426."
JPL Sentry17352089-2119131.2555e-05-5.88-6.360JPL: Computed at 06:08 today Pacific time based on 41 observations spanning 13.073 days (2020-Nov-23.352624 to 2020-Dec-06.42517). Diameter approximately 0.020 km. from weighted mean H=26.19.
2017 WF30JPL Sentry17352020-21199672.0071548e-06-6.00-6.960JPL: Computed at 13:42 Dec. 18th of 2019 Pacific time based on 8 observations spanning .17008 days (2017-Nov-28.27313 to 2017-Nov-28.44321). Diameter approximately 0.018 km. from weighted mean H=26.38.
2010 XQJPL Sentry17352021-2116692.06259e-07-6.61-7.290JPL: Computed at 20:02 April 8th of 2017 Pacific time based on 15 observations spanning .12618 days (2010-Dec-02.30871 to 2010-Dec-02.43489). Diameter approximately 0.031 km. from weighted mean H=25.17.
2007 YMJPL Sentry17352020-21152474.3315282e-06-5.65-6.300JPL: Computed at 20:16 April 8th of 2017 Pacific time based on 12 observations spanning .12805 days (2007-Dec-17.39661 to 2007-Dec-17.52466). Diameter approximately 0.018 km. from weighted mean H=26.34.
2005 XA8JPL Sentry17352063-2086213.58134692e-05-4.78-5.220JPL: Computed at 19:21 April 14th of 2017 Pacific time based on 61 observations spanning 17.964 days (2005-Dec-06.31929 to 2005-Dec-24.28292). Diameter approximately 0.025 km. from weighted mean H=25.64.
2005 TM173JPL Sentry17352021-21161469.395122e-07-5.34-6.230JPL: Computed at 08:06 April 8th of 2017 Pacific time based on 6 observations spanning 1.9467 days (2005-Oct-09.20072 to 2005-Oct-11.14743). Diameter approximately 0.051 km. from weighted mean H=24.12.

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 6 December '20

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

2036Grabbed MPEC 2020-X31 - 2020 XM - see above
Grabbed MPEC 2020-X32 - 2020 XN - see above
Grabbed MPEC 2020-X33 - 2020 XO - see above
1900Noted that NEODyS has updated its 2020 WF5 risk assessment - see above
Noted that NEODyS has updated its 2020 WG5 risk assessment - see above
Noted that NEODyS has updated its 2020 WT4 risk assessment - see above
Noted that NEODyS has updated its 2020 WZ3 risk assessment - see above
Noted that NEODyS has posted 2020 XC as an impact risk - see above
Noted that NEODyS has posted 2020 XE as an impact risk - see above
Noted that NEODyS has posted 2020 XF as an impact risk - see above
Noted that NEODyS has posted 2020 XG as an impact risk - see above
1735Noted that JPL Sentry has updated its 2005 TM173 risk assessment - see above
Noted that JPL Sentry has updated its 2005 XA8 risk assessment - see above
Noted that JPL Sentry has updated its 2007 YM risk assessment - see above
Noted that JPL Sentry has updated its 2010 XQ risk assessment - see above
Noted that JPL Sentry has updated its 2017 WF30 risk assessment - see above
Noted that JPL Sentry has updated its 2020 WZ3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 XC risk assessment - see above
Noted that JPL Sentry has updated its 2020 XF risk assessment - see above
Noted that JPL Sentry has updated its 2020 XG risk assessment - see above
Grabbed MPEC 2020-X25 - 2003 WJ98 - see above
Grabbed MPEC 2020-X26 - 2018 XU3 - see above
Grabbed MPEC 2020-X27 - 2020 WV5 - see above
Grabbed MPEC 2020-X28 - 2020 XK - see above
Grabbed MPEC 2020-X29 - 2020 XL - see above
Grabbed MPEC 2020-X30 - Daily Orbit Update - see above
0530Grabbed MPEC 2020-X23 - 2015 XB - see above
Grabbed MPEC 2020-X24 - 2020 XJ - see above