Contents  on 31 July '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 31 July '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 2000 UTC when the database was dated 31 July



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

NEOCP Activity  on 31 July '20

The MPC's NEO Confirmation Page has 44 listings

When last checked at 2231 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 44 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 58 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 31 July '20

Minor Planet Electronic Circulars

As of last check at 2231 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-O181 - "20:55 UT" - 2020 OE6


MPEC 2020-O180 - "20:19 UT" - 2020 OK6


MPEC 2020-O179 - "20:04 UT" - 2020 OG6


MPEC 2020-O178 - "20:02 UT" - 2020 OF6


<< DOU on 31 July '20 >>  MPEC 2020-O177 - "12:03 UT" - Daily Orbit Update

Observers  on 31 July '20

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2020 NK1
T05ATLAS Haleakala in Hawaii, 7 in MPEC 2020-O177 -- 66008, 497135, 480936, 428086, 105140, 9162, 3752
T08ATLAS Mauna Loa in Hawaii, 29 in MPEC 2020-O177 -- 2020 MZ3, 2020 MC4, 2020 LA2, 2020 JW1, 2006 HB, 88264, 87311, 68950, 66251, 54789, 53435, 505657, 480824, 468730, 442037, 431775, 382625, 361123, 354952, 241662, 19764, 190166, 136900, 106538, 4953, 3671, 3288, 1917, 887
L54Berthelot Obs., 2 in MPEC 2020-O177 -- 2019 NC1, 2016 PN
X74Campo dos Amarais Obs., 1 in MPEC 2020-O177 -- 9202
160Castelmartini Obs. in Italy, 1 in MPEC 2020-O177 -- 2020 OY5
703Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2020-O177 -- 2020 OJ2, 2020 NA, 2019 AN5, 2016 FY14, 2006 UD63, 65690, 505657, 420302, 382625, 357058, 354952, 19764, 144411, 137108
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-O180 -- 2020 OK6
K87Dettelbach Vineyard Obs. in Germany, 8 in MPEC 2020-O177 -- 2020 OY5, 2020 OM3, 2020 OJ2, 2020 HS8, 2019 AN5, 2014 LW21, 2006 UD63, 2006 HB
U55Golden Ears Obs., 1 in MPEC 2020-O177 -- 2020 OU5
J95Great Shefford Obs. in England, 2 in MPEC 2020-O177 -- 2020 OX5, 2020 OU5
A17Guidestar Obs. in Germany, 6 in MPEC 2020-O177 -- 2020 OU5, 2020 OG4, 2020 OC1, 2016 NV38, 2001 QE34, 401954
L63HOB Obs., 2 in MPEC 2020-O177 -- 85275, 442037
246KLENOT in the Czech Republic, 1 in MPEC 2020-O177 -- 2020 OU5
C401program code 1 via Kuban State Univ. Obs. in Russia, 2 in MPEC 2020-O177 -- 85275, 420302
K91LCO Sutherland A in South Africa, 2 in MPEC 2020-O177 -- 2020 OM4, 2020 OG3
Z22MASTER IAC Obs. in the Canary Islands, 1 in MPEC 2020-O177 -- 420302
V01Mountainville Obs. in Utah, 1 in MPEC 2020-O177 -- 2020 OE4
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2020-O177, 2020-O178 & 2020-O181 -- 2020 OW3, 2020 OT1, 2020 OH5, 2020 OF6, 2020 OE6, 2017 XL62, 2013 PY6, 523650, 435302, 304153, 16960, 3288, 1917
0895N.V. Maigurova via Nikolaev Obs. in Ukraine, 4 in MPEC 2020-O177 -- 2016 PN, 85275, 6569, 1685
J69North Obs. in England, 1 in MPEC 2020-O177 -- 2020 MX3
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2020-O177, 2020-O179, 2020-O180 & 2020-O181 -- 2020 OK6, 2020 OG6, 2020 OE6, 2020 BB16, 500094, 343098, 302591, 276786, 27002, 16834, 155140, 144411, 115052, 1863
F52Pan-STARRS 2 (PS2) in Hawaii, 8 in MPECs 2020-O177, 2020-O179 & 2020-O181 -- 2020 OY3, 2020 OG6, 2020 OE6, 2017 QM18, 53430, 163014, 139047, 887
K63Pascoli Obs. in Italy, 1 in MPEC 2020-O177 -- 2006 HB
654Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2020-O177 -- 2020 OU4
V11Saguaro Obs., 1 in MPEC 2020-O177 -- 433
104San Marcello Pistoiese Obs. in Italy, 4 in MPEC 2020-O177 -- 2020 OY5, 2019 AN5, 2014 LW21, 2006 HB
C95SATINO-1 in France, 1 in MPEC 2020-O177 -- 2017 QM18
204Schiaparelli Obs. in Italy, 9 in MPEC 2020-O177 -- 2020 OY4, 2020 OW5, 2020 OO1, 2020 OM3, 2020 OE2, 2020 MX3, 2016 PN, 2007 CH15, 9162
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2020-O177 -- 2019 QR
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2020-O177 -- 2019 PG
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-O178 -- 2020 OF6
I52Steward Obs. Mt. Lemmon Station in Arizona, 24 in MPECs 2020-O177 & 2020-O178 -- 2020 OW5, 2020 OU5, 2020 OT4, 2020 OT, 2020 OS4, 2020 OM3, 2020 OF6, 2020 OC1, 2020 OA1, 2020 NJ1, 2020 NC1, 2020 NA, 2020 MX, 2020 MP, 2020 ML3, 2020 LZ1, 2020 LR, 2020 LJ2, 2020 HS8, 2020 BL9, 2017 QX34, 2014 VM, 2013 LV28, 2012 PA
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-O177 -- 2009 FL25
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-O178 -- 2020 OF6
C51WISE in Earth polar orbit, 1 in MPEC 2020-O177 -- 106589
I41Zwicky Transient Facility (ZTF) in southern California, 6 in MPEC 2020-O177 -- 2020 OW3, 2020 OG4, 2017 XL62, 85804, 420302, 163902
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 July '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2231 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 OY5JPL Sentry16002063-208132.5595e-06-4.74-4.820JPL: Computed at 06:45 today Pacific time based on 43 observations spanning 2.5830 days (2020-Jul-28.486878 to 2020-Jul-31.06984). Diameter approximately 0.066 km. from weighted mean H=23.55.
NEODyS16002063-208141.95e-06-4.86-5.010NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2020-07-28.488 to 2020-07-31.071."
2020 OX5JPL Sentry16002033-206351.2150094e-06-6.59-6.720JPL: Computed at 06:42 today Pacific time based on 24 observations spanning 1.6512 days (2020-Jul-29.3501 to 2020-Jul-31.001318). Diameter approximately 0.014 km. from weighted mean H=26.95.
NEODyS16002033-206341.01e-07-7.48-7.480NEODyS: "Based on 24 optical observations (of which 2 are rejected as outliers) from 2020-07-29.351 to 2020-07-31.002."
2020 NK1JPL Sentry2100R E M O V E DJPL: Risk listing removed at 2003 UTC today
NEODyS16002086-2112112.21e-06-2.53-2.940NEODyS: "Based on 95 optical observations (of which 0 are rejected as outliers) from 2020-07-13.569 to 2020-07-29.141."
2019 PGNEODyS16002101-2118101.66e-06-6.49-6.620NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2019-08-04.395 to 2019-08-25.415."

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 31 July '20

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

2231Grabbed MPEC 2020-O181 - 2020 OE6 - see above
2100Noted that JPL Sentry has removed 2020 NK1 as an impact risk - see above
2021Grabbed MPEC 2020-O180 - 2020 OK6 - see above
2010Grabbed MPEC 2020-O178 - 2020 OF6 - see above
Grabbed MPEC 2020-O179 - 2020 OG6 - see above
2000Noted Radar Astrometry database update - see above
1600Noted that NEODyS has updated its 2019 PG risk assessment - see above
Noted that NEODyS has updated its 2020 NK1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 OX5 risk assessment - see above
Noted that NEODyS has updated its 2020 OX5 risk assessment - see above
Noted that JPL Sentry has updated its 2020 OY5 risk assessment - see above
Noted that NEODyS has posted 2020 OY5 as an impact risk - see above
Grabbed MPEC 2020-O177 - Daily Orbit Update - see above