Contents  on 28 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 28 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 0008 UTC when the database was dated 27 July



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

NEOCP Activity  on 28 July '20

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 45 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 28 July '20

Minor Planet Electronic Circulars

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


MPEC 2020-O149 - "23:38 UT" - 2020 OL5


MPEC 2020-O148 - "20:08 UT" - 2020 OK5


MPEC 2020-O147 - "17:56 UT" - 2015 DE249


MPEC 2020-O146 - "17:02 UT" - 2015 BX603


MPEC 2020-O145 - "16:59 UT" - 2010 VE253


MPEC 2020-O144 - "16:04 UT" - 2013 CZ242


MPEC 2020-O143 - "16:01 UT" - 2012 TF359


MPEC 2020-O142 - "14:59 UT" - 2014 ND81


MPEC 2020-O141 - "14:45 UT" - 2009 YK32


MPEC 2020-O140 - "14:31 UT" - 2013 MR18


<< DOU on 28 July '20 >>  MPEC 2020-O139 - "12:25 UT" - Daily Orbit Update


MPEC 2020-O138 - "03:02 UT" - 2020 OJ5


MPEC 2020-O137 - "01:51 UT" - 2020 OH5

Observers  on 28 July '20

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

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2019 AW7
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2020-O139 -- 2020 OW4, 2020 OV4, 2020 NB1, 2020 MM, 2020 KV7, 2020 KR5, 434344
T08ATLAS Mauna Loa in Hawaii, 3 in MPEC 2020-O139 -- 66391, 136874, 11405
G17BAS Obs., 5 in MPEC 2020-O139 -- 2020 OO1, 2006 UD63, 2006 HB, 2004 LU3, 4179
215Buchloe Obs. in Germany, 1 in MPEC 2020-O139 -- 2020 OY4
Z84Calar Alto Schmidt in Spain, 3 in MPEC 2020-O139 -- 2020 OY4, 2020 OM3, 2020 NK1
X74Campo dos Amarais Obs., 3 in MPEC 2020-O139 -- 2014 JH57, 169675, 1566
Z36Cancelada Obs., 1 in MPEC 2020-O139 -- 85275
160Castelmartini Obs. in Italy, 5 in MPEC 2020-O139 -- 468730, 420302, 380128, 136900, 106538
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2020-O139 -- 380128, 162173
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 2 in MPECs 2020-O137 & 2020-O149 -- 2020 OL5, 2020 OH5
W84!program code "!" (10) via DECam in Chile, 1 in MPEC 2020-O147 -- 2015 DE249
K87Dettelbach Vineyard Obs. in Germany, 11 in MPEC 2020-O139 -- 2020 OL1, 2020 OJ2, 2020 OE2, 2020 NA, 2020 MX3, 2020 HS8, 2019 AN5, 2016 PN, 2006 UD63, 2006 HB, 2003 BK47
L34Galhassin Robotic Telescope, 2 in MPEC 2020-O139 -- 2020 OY4, 2020 MX3
J95Great Shefford Obs. in England, 5 in MPECs 2020-O137 & 2020-O139 -- 2020 OY4, 2020 OU4, 2020 OH5, 2020 OD, 2020 NK1
A17Guidestar Obs. in Germany, 1 in MPEC 2020-O139 -- 2020 OE4
L63HOB Obs., 2 in MPEC 2020-O139 -- 2004 LU3, 11405
246KLENOT in the Czech Republic, 3 in MPEC 2020-O139 -- 2020 OE2, 2020 NA, 2020 MX3
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-O139 -- 85275
V01Mountainville Obs. in Utah, 3 in MPEC 2020-O139 -- 2020 OL1, 2020 OE4, 2020 NN
474Mt. John Obs. in New Zealand, 10 in MPEC 2020-O139 -- 2020 OY4, 2020 OO1, 2020 ON1, 2020 ON, 2020 OJ3, 2020 OF3, 2020 OD3, 2020 OB5, 2020 NZ, 2020 NL1
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2020-O137, 2020-O138, 2020-O139, 2020-O145 & 2020-O149 -- 2020 OZ2, 2020 OL5, 2020 OJ5, 2020 OH5, 2020 NC1, 2020 MZ3, 2020 JW1, 2016 PN, 2010 VE253, 215167, 19764
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2020-O140, 2020-O141, 2020-O142, 2020-O143, 2020-O144, 2020-O145, 2020-O146, 2020-O147, 2020-O148 & 2020-O149 -- 2020 OL5, 2020 OK5, 2015 DE249, 2015 BX603, 2014 ND81, 2013 MR18, 2013 CZ242, 2012 TF359, 2010 VE253, 2009 YK32
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2020-O138, 2020-O140, 2020-O143, 2020-O144, 2020-O147 & 2020-O149 -- 2020 OL5, 2020 OJ5, 2015 DE249, 2013 MR18, 2013 CZ242, 2012 TF359
K63Pascoli Obs. in Italy, 2 in MPEC 2020-O139 -- 2020 OY4, 2014 LW21
V93Pin Oak Obs., 6 in MPEC 2020-O139 -- 2014 LW21, 90147, 54789, 382503, 380128, 7977
104San Marcello Pistoiese Obs. in Italy, 3 in MPEC 2020-O139 -- 2020 OY4, 2020 HS8, 2004 XP14
C95SATINO-1 in France, 1 in MPEC 2020-O139 -- 2013 TV144
033Schwarzschild Obs. in Germany, 1 in MPEC 2020-O137 -- 2020 OH5
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-O139 -- 2020 OD
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-O137 -- 2020 OH5
I52Steward Obs. Mt. Lemmon Station in Arizona, 4 in MPEC 2020-O139 -- 2020 OG4, 2020 OG3, 2020 OE2, 2020 OC
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-O139 -- 2014 KP84
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-O137, 2020-O138 & 2020-O139 -- 2020 OJ5, 2020 OH5, 2016 NO16
C51WISE in Earth polar orbit, 1 in MPEC 2020-O139 -- 106589
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2020-O139 -- 85275, 500094
I41Zwicky Transient Facility (ZTF) in southern California, 10 in MPEC 2020-O139 -- 2020 OG4, 2020 KR7, 85184, 420302, 357058, 23714, 159929, 136900, 4503, 4055
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 July '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 OY4JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1439 UTC today
2020 OO1JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1436 UTC today
NEODyS1600R E M O V E D-
2020 NK1JPL Sentry17002091-210152.304294e-05-1.52-1.811JPL #2 for the day: Computed at 08:57 today Pacific time based on 80 observations spanning 14.572 days (2020-Jul-13.567919 to 2020-Jul-28.140261). Diameter approximately 0.530 km. from weighted mean H=19.03.
NEODyS16002086-2102109.72e-06-1.90-2.191NEODyS: "Based on 87 optical observations (of which 0 are rejected as outliers) from 2020-07-13.569 to 2020-07-28.141."
2019 BZJPL Sentry16002077-2119182.6988944e-05-6.03-6.240JPL: Computed at 07:47 Feb. 12th of 2019 Pacific time based on 36 observations spanning 12.053 days (2019-Jan-24.224468 to 2019-Feb-05.277716). Diameter approximately 0.010 km. from weighted mean H=27.59.
2018 PZ21JPL Sentry16002045-2119183.8340258e-05-5.37-5.440JPL: Computed at 06:21 Aug. 17th of 2019 Pacific time based on 19 observations spanning 25.206 days (2018-Aug-11.13921 to 2018-Sep-05.345076). Diameter approximately 0.016 km. from weighted mean H=26.67.
2011 BH40JPL Sentry16002023-2116641.424403e-07-6.56-7.110JPL: Computed at 06:55 April 7th of 2017 Pacific time based on 12 observations spanning .06577 days (2011-Jan-30.42363 to 2011-Jan-30.4894). Diameter approximately 0.033 km. from weighted mean H=25.09.

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 28 July '20

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

2358Grabbed MPEC 2020-O149 - 2020 OL5 - see above
2105Grabbed MPEC 2020-O148 - 2020 OK5 - see above
1936Grabbed MPEC 2020-O145 - 2010 VE253 - see above
Grabbed MPEC 2020-O146 - 2015 BX603 - see above
Grabbed MPEC 2020-O147 - 2015 DE249 - see above
1700Noted that JPL Sentry has updated its 2020 NK1 risk assessment - see above
1611Grabbed MPEC 2020-O143 - 2012 TF359 - see above
Grabbed MPEC 2020-O144 - 2013 CZ242 - see above
1600Noted that JPL Sentry has updated its 2011 BH40 risk assessment - see above
Noted that JPL Sentry has updated its 2018 PZ21 risk assessment - see above
Noted that JPL Sentry has updated its 2019 BZ risk assessment - see above
Noted that JPL Sentry has updated its 2020 NK1 risk assessment - see above
Noted that NEODyS has updated its 2020 NK1 risk assessment - see above
Noted that JPL Sentry has removed 2020 OO1 as an impact risk - see above
Noted that NEODyS has removed 2020 OO1 as an impact risk - see above
Noted that JPL Sentry has removed 2020 OY4 as an impact risk - see above
Grabbed MPEC 2020-O139 - Daily Orbit Update - see above
Grabbed MPEC 2020-O140 - 2013 MR18 - see above
Grabbed MPEC 2020-O141 - 2009 YK32 - see above
Grabbed MPEC 2020-O142 - 2014 ND81 - see above
0400Grabbed MPEC 2020-O137 - 2020 OH5 - see above
Grabbed MPEC 2020-O138 - 2020 OJ5 - see above
0008Noted Radar Astrometry database update - see above