Contents  on 21 August '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 21 August '20

Radar observation of five objects

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


Data update noted at 0100 UTC when the database was dated 20 Aug.


Data update noted at 0430 UTC when the database was dated 20 Aug.


Data update noted at 1900 UTC when the database was dated 21 Aug.


Data update noted at 2200 UTC when the database was dated 21 Aug.



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

NEOCP Activity  on 21 August '20

The MPC's NEO Confirmation Page has 52 listings

When last checked at 2200 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 52 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 76 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 21 August '20

Minor Planet Electronic Circulars

As of last check at 2200 UTC, there have been sixteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-Q149 - "17:36 UT" - 2020 QV3


MPEC 2020-Q148 - "15:07 UT" - 2020 HW9


MPEC 2020-Q147 - "14:03 UT" - 2020 QT3


<< DOU on 21 August '20 >>  MPEC 2020-Q146 - "12:11 UT" - Daily Orbit Update


MPEC 2020-Q145 - "11:38 UT" - 2020 QS3


MPEC 2020-Q144 - "07:43 UT" - 2020 QP3


MPEC 2020-Q143 - "05:49 UT" - 2020 QO3


MPEC 2020-Q142 - "05:48 UT" - 2020 QN3


MPEC 2020-Q141 - "02:36 UT" - 2020 QK3


MPEC 2020-Q140 - "01:27 UT" - 2020 QH3


MPEC 2020-Q139 - "01:26 UT" - 2020 QG3


MPEC 2020-Q138 - "01:25 UT" - 2020 QF3


MPEC 2020-Q137 - "01:23 UT" - 2020 QE3


MPEC 2020-Q136 - "01:22 UT" - 2020 QD3


MPEC 2020-Q135 - "00:50 UT" - 2020 QC3


MPEC 2020-Q134 - "00:27 UT" - 2020 QB3

Observers  on 21 August '20

A total of 48 observers appear in today's MPECs.

CodeObserver / observatory
U71AHS Obs., 1 in MPEC 2020-Q146 -- 420302
E23Arcadia Obs. in New South Wales, 1 in MPEC 2020-Q147 -- 2020 QT3
251Arecibo in Puerto Rico, 5 in radar -- 2020 OE2, 2020 MX3, 2015 FP332, 480936, 242450
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2020-Q134, 2020-Q135, 2020-Q136, 2020-Q137, 2020-Q138, 2020-Q139, 2020-Q142, 2020-Q143, 2020-Q144, 2020-Q145, 2020-Q146 & 2020-Q149 -- 2020 QV3, 2020 QS3, 2020 QP3, 2020 QO3, 2020 QN3, 2020 QL2, 2020 QG3, 2020 QF3, 2020 QE3, 2020 QD3, 2020 QC3, 2020 QB3
T08ATLAS Mauna Loa in Hawaii, 1 in MPEC 2020-Q147 -- 2020 QT3
U63Burnt Tree Hill Obs., 1 in MPEC 2020-Q146 -- 497135
160Castelmartini Obs. in Italy, 7 in MPEC 2020-Q146 -- 2016 NV38, 2016 ED85, 2014 QL433, 2014 NE64, 471241, 420302, 354952
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2020-Q146 -- 2020 KS, 2020 KD1, 2020 GY2, 2020 GV2
V94Cherokee Ridge Obs., 3 in MPEC 2020-Q146 -- 90147, 106589, 3752
Z99Clixby Obs. in England, 1 in MPEC 2020-Q146 -- 2020 PS
K87Dettelbach Vineyard Obs. in Germany, 2 in MPEC 2020-Q146 -- 2020 QW, 2020 QM1
734Farpoint Obs. in Kansas, 2 in MPECs 2020-Q142 & 2020-Q149 -- 2020 QV3, 2020 QN3
K83Forti Obs., 2 in MPEC 2020-Q146 -- 2020 PY2, 2020 OJ2
L34Galhassin Robotic Telescope, 2 in MPEC 2020-Q146 -- 2020 PY2, 2020 PQ2
X31Galilei Obs., 1 in MPEC 2020-Q147 -- 2020 QT3
U76Glendora Obs., 1 in MPEC 2020-Q146 -- 11405
K73Gravina Obs. in Italy, 4 in MPEC 2020-Q146 -- 2020 PS, 420302, 136900, 105140
J95Great Shefford Obs. in England, 5 in MPECs 2020-Q146 & 2020-Q149 -- 2020 QY2, 2020 QV3, 2020 QO1, 2020 PY2, 2020 PQ2
A17Guidestar Obs. in Germany, 3 in MPEC 2020-Q146 -- 2017 XL62, 2006 SS19, 465824
246KLENOT in the Czech Republic, 20 in MPECs 2020-Q136, 2020-Q138, 2020-Q139, 2020-Q141, 2020-Q146 & 2020-Q149 -- 2020 QW, 2020 QV3, 2020 QV1, 2020 QM1, 2020 QK3, 2020 QH, 2020 QG3, 2020 QF3, 2020 QF, 2020 QD3, 2020 PY2, 2020 PS, 2020 PR2, 2020 PQ2, 2020 PP3, 2020 PM4, 2020 PG, 2020 OV6, 2020 OK5, 2020 OA2
K38M57 Obs. in Italy, 3 in MPEC 2020-Q146 -- 2020 QM1, 2020 PS, 2019 AN5
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2020-Q146 -- 8566
K95MASTER-II Sutherland in South Africa, 2 in MPEC 2020-Q146 -- 376707, 20826
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-Q143 -- 2020 QO3
G96Mt. Lemmon Survey (MLS) in Arizona, 27 in MPECs 2020-Q136, 2020-Q142, 2020-Q144, 2020-Q145, 2020-Q146 & 2020-Q149 -- 2020 QV3, 2020 QS3, 2020 QP3, 2020 QN3, 2020 QD3, 2020 QD, 2020 QB2, 2020 PR2, 2020 PC, 2020 OM6, 2020 OA2, 2020 NF, 2020 MD2, 2020 LB3, 2020 KS, 2020 HW7, 2020 DN3, 2014 LW21, 2013 QL10, 2009 QN5, 2005 QS10, 2004 QD3, 435302, 410622, 374267, 190166, 887
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 6 in MPEC 2020-Q146 -- 85275, 428086, 420302, 382503, 242450, 8014
C47Nonndorf Obs. in Austria, 3 in MPEC 2020-Q146 -- 2020 QM1, 2020 PS, 420302
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-Q146 -- 2020 QY2
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-Q146 -- 2020 QY2
C27Pallerols Obs. in Spain, 2 in MPEC 2020-Q146 -- 500094, 420302
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2020-Q134, 2020-Q135, 2020-Q136, 2020-Q137, 2020-Q138, 2020-Q139, 2020-Q140, 2020-Q141, 2020-Q143, 2020-Q144, 2020-Q145, 2020-Q146 & 2020-Q148 -- 2020 QS3, 2020 QP3, 2020 QO3, 2020 QK3, 2020 QH3, 2020 QG3, 2020 QF3, 2020 QE3, 2020 QD3, 2020 QC3, 2020 QB3, 2020 HW9, 292165
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2020-Q134, 2020-Q135, 2020-Q136, 2020-Q138, 2020-Q141, 2020-Q142 & 2020-Q146 -- 2020 QN3, 2020 QK3, 2020 QF3, 2020 QD3, 2020 QC3, 2020 QB3, 2020 AK
122Pises Obs. in France, 4 in MPEC 2020-Q146 -- 420302, 382625, 138847, 115052
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2020-Q141 -- 2020 QK3
O49Purple Mtn. Obs. Yaoan Station in China, 1 in MPEC 2020-Q141 -- 2020 QK3
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2020-Q149 -- 2020 QV3
H36Sandlot Obs. in Kansas, 2 in MPECs 2020-Q146 & 2020-Q149 -- 2020 QV3, 2020 QV1
C95SATINO-1 in France, 1 in MPEC 2020-Q146 -- 2011 SF3
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-Q149 -- 2020 QV3
033Schwarzschild Obs. in Germany, 16 in MPECs 2020-Q134, 2020-Q136, 2020-Q137, 2020-Q138, 2020-Q139, 2020-Q140, 2020-Q142, 2020-Q144, 2020-Q146 & 2020-Q149 -- 2020 QW2, 2020 QV3, 2020 QS1, 2020 QP3, 2020 QO1, 2020 QN3, 2020 QL1, 2020 QH3, 2020 QH, 2020 QG3, 2020 QF3, 2020 QE3, 2020 QE2, 2020 QD3, 2020 QB3, 2020 PQ2
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-Q146 -- 7350
W881Tony Evans in Portugal via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-Q147 -- 2020 QT3
587Sormano Obs. in Italy, 1 in MPEC 2020-Q146 -- 137108
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-Q141 -- 2020 QK3
T14UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-Q146 -- 2012 XJ55
L01Visnjan Obs. in Croatia, 8 in MPECs 2020-Q134, 2020-Q136, 2020-Q137, 2020-Q138, 2020-Q139, 2020-Q142, 2020-Q146 & 2020-Q149 -- 2020 QV3, 2020 QN3, 2020 QH3, 2020 QG3, 2020 QF3, 2020 QE3, 2020 QD3, 2020 QB3
D201program code 1 via Zadko Obs. in Western Australia, 1 in MPEC 2020-Q146 -- 2020 QY2
I41Zwicky Transient Facility (ZTF) in southern California, 26 in MPEC 2020-Q146 -- 2020 PD1, 2020 PC3, 2020 OW3, 2020 NA, 2016 RU, 2016 NV38, 2015 PS57, 2002 JE9, 99935, 523792, 497094, 480824, 420302, 410622, 382625, 322763, 299582, 27031, 21088, 190208, 16834, 16816, 163902, 154278, 115052, 4486
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 August '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2200 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 QG3JPL Sentry1701R E M O V E DJPL #2 for the day: Risk listing removed at 1420 UTC today
2020 QB2JPL Sentry1701R E M O V E DJPL: Risk listing removed at 1422 UTC today
NEODyS17312081-211243.97e-08-7.68-7.850NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-08-14.574 to 2020-08-19.955."
2020 PQ2NEODyS17312066-210431.22e-06-5.30-5.320NEODyS: "Based on 104 optical observations (of which 0 are rejected as outliers) from 2020-08-08.478 to 2020-08-20.995."
JPL Sentry17012066-209227.5e-07-5.52-5.570JPL: Computed at 07:19 today Pacific time based on 104 observations spanning 12.516 days (2020-Aug-08.477485 to 2020-Aug-20.993964). Diameter approximately 0.047 km. from weighted mean H=24.27.
2020 PCNEODyS17312056-2116537.96e-06-6.95-7.460NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2020-07-31.390 to 2020-08-07.125."
JPL Sentry17012074-207411.071e-05-6.69-6.690JPL: Computed at 07:08 today Pacific time based on 20 observations spanning 6.7346 days (2020-Jul-31.38958 to 2020-Aug-07.124211). Diameter approximately 0.009 km. from weighted mean H=27.98.
2020 OM6JPL Sentry1701R E M O V E DJPL: Risk listing removed at 1408 UTC today
NEODyS17312106-211827.82e-08-7.54-7.690NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-07-19.520 to 2020-08-17.065."
2020 KD1NEODyS17312042-206131.86e-08-8.92-8.960NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2020-05-18.331 to 2020-05-22.070."
JPL Sentry17012042-204214.143e-08-8.53-8.530JPL: Computed at 07:41 today Pacific time based on 54 observations spanning 3.7391 days (2020-May-18.33002 to 2020-May-22.06909). Diameter approximately 0.009 km. from weighted mean H=27.92.
2020 KSNEODyS17312079-211843.23e-08-8.21-8.280NEODyS: "Based on 133 optical observations (of which 2 are rejected as outliers) from 2020-05-16.493 to 2020-06-29.260."
JPL Sentry17012055-207231.6146e-08-8.27-8.660JPL: Computed at 07:06 today 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.
2020 HW7NEODyS17312044-2117131.29e-06-6.84-6.890NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2020-04-26.366 to 2020-04-30.209."
JPL Sentry17012044-209051.32388e-06-6.83-6.910JPL: Computed at 07:03 today Pacific time based on 23 observations spanning 3.8439 days (2020-Apr-26.364714 to 2020-Apr-30.2086). Diameter approximately 0.012 km. from weighted mean H=27.20.
2020 GY2NEODyS17312093-211222.01e-09-8.10-8.110NEODyS: "Based on 98 optical observations (of which 1 are rejected as outliers) from 2020-04-15.350 to 2020-05-01.440."
JPL Sentry17012093-209313.267e-08-6.88-6.880JPL: Computed at 06:59 today Pacific time based on 98 observations spanning 16.090 days (2020-Apr-15.34915 to 2020-May-01.43888). Diameter approximately 0.064 km. from weighted mean H=23.63.
2020 GV2JPL Sentry17012077-207829.569e-08-7.88-8.080JPL: Computed at 06:59 today Pacific time based on 49 observations spanning 8.2572 days (2020-Apr-13.1463 to 2020-Apr-21.40347). Diameter approximately 0.014 km. from weighted mean H=26.85.
2020 DN3NEODyS17312104-2117102.68e-07-7.65-8.120NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2020-02-26.217 to 2020-03-05.239."
JPL Sentry17012107-211979.82686e-07-7.09-7.630JPL: Computed at 07:02 today Pacific time based on 73 observations spanning 8.0225 days (2020-Feb-26.21575 to 2020-Mar-05.23824). Diameter approximately 0.015 km. from weighted mean H=26.83.
2019 QDJPL Sentry04302112-211211.201e-07-8.88-8.880JPL: Computed at 19:29 Aug. 21st of 2019 Pacific time based on 20 observations spanning .64919 days (2019-Aug-21.24143 to 2019-Aug-21.89062). Diameter approximately 0.006 km. from weighted mean H=28.76.
2017 WE29JPL Sentry04302024-21171151.0010617e-06-6.35-7.220JPL: Computed at 08:15 Dec. 15th of 2017 Pacific time based on 12 observations spanning 1.1817 days (2017-Nov-27.25264 to 2017-Nov-28.43436). Diameter approximately 0.022 km. from weighted mean H=25.93.
2016 VZ17JPL Sentry04302021-21161794.143429e-07-7.34-8.260JPL: Computed at 13:13 April 6th of 2017 Pacific time based on 8 observations spanning .18721 days (2016-Nov-05.31503 to 2016-Nov-05.50224). Diameter approximately 0.011 km. from weighted mean H=27.38.
2009 OW6JPL Sentry04302080-211521.1681e-05-5.39-5.550JPL: Computed at 16:07 April 7th of 2017 Pacific time based on 54 observations spanning 13.174 days (2009-Jul-27.36058 to 2009-Aug-09.534873). Diameter approximately 0.029 km. from weighted mean H=25.31.
2007 DS7JPL Sentry04302048-2114232.10660329e-05-5.17-5.390JPL: Computed at 17:09 April 15th of 2017 Pacific time based on 25 observations spanning 4.2198 days (2007-Feb-21.19007 to 2007-Feb-25.4099). Diameter approximately 0.023 km. from weighted mean H=25.85.
2005 WG57JPL Sentry04302029-210477.22824e-07-5.31-5.460JPL: Computed at 20:10 April 9th of 2017 Pacific time based on 74 observations spanning 30.054 days (2005-Nov-30.19832 to 2005-Dec-30.251939). Diameter approximately 0.063 km. from weighted mean H=23.64.

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 21 August '20

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

2200Noted Radar Astrometry database update - see above
1900Noted Radar Astrometry database update - see above
1741Grabbed MPEC 2020-Q149 - 2020 QV3 - see above
1731Noted that NEODyS has updated its 2020 DN3 risk assessment - see above
Noted that NEODyS has updated its 2020 GY2 risk assessment - see above
Noted that NEODyS has updated its 2020 HW7 risk assessment - see above
Noted that NEODyS has updated its 2020 KD1 risk assessment - see above
Noted that NEODyS has updated its 2020 KS risk assessment - see above
Noted that NEODyS has updated its 2020 OM6 risk assessment - see above
Noted that NEODyS has updated its 2020 PC risk assessment - see above
Noted that NEODyS has updated its 2020 PQ2 risk assessment - see above
Noted that NEODyS has updated its 2020 QB2 risk assessment - see above
1701Noted that JPL Sentry has updated its 2020 DN3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GV2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GY2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HW7 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KD1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KS risk assessment - see above
Noted that JPL Sentry has removed 2020 OM6 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 PC risk assessment - see above
Noted that JPL Sentry has updated its 2020 PQ2 risk assessment - see above
Noted that JPL Sentry has removed 2020 QB2 as an impact risk - see above
Noted that JPL Sentry has removed 2020 QG3 as an impact risk - see above
1700Grabbed MPEC 2020-Q142 - 2020 QN3 - see above
Grabbed MPEC 2020-Q143 - 2020 QO3 - see above
Grabbed MPEC 2020-Q144 - 2020 QP3 - see above
Grabbed MPEC 2020-Q145 - 2020 QS3 - see above
Grabbed MPEC 2020-Q146 - Daily Orbit Update - see above
Grabbed MPEC 2020-Q147 - 2020 QT3 - see above
Grabbed MPEC 2020-Q148 - 2020 HW9 - see above
0430Noted that JPL Sentry has updated its 2005 WG57 risk assessment - see above
Noted that JPL Sentry has updated its 2007 DS7 risk assessment - see above
Noted that JPL Sentry has updated its 2009 OW6 risk assessment - see above
Noted that JPL Sentry has updated its 2016 VZ17 risk assessment - see above
Noted that JPL Sentry has updated its 2017 WE29 risk assessment - see above
Noted that JPL Sentry has updated its 2019 QD risk assessment - see above
Noted that JPL Sentry has posted 2020 QG3 as an impact risk - see above
Grabbed MPEC 2020-Q136 - 2020 QD3 - see above
Grabbed MPEC 2020-Q137 - 2020 QE3 - see above
Grabbed MPEC 2020-Q138 - 2020 QF3 - see above
Grabbed MPEC 2020-Q139 - 2020 QG3 - see above
Grabbed MPEC 2020-Q140 - 2020 QH3 - see above
Grabbed MPEC 2020-Q141 - 2020 QK3 - see above
Noted Radar Astrometry database update - see above
0100Grabbed MPEC 2020-Q134 - 2020 QB3 - see above
Grabbed MPEC 2020-Q135 - 2020 QC3 - see above
Noted Radar Astrometry database update - see above