Contents  on 5 May '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 5 May '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 1630 UTC when the database was dated 4 May



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

NEOCP Activity  on 5 May '20

The MPC's NEO Confirmation Page has 45 listings

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 45 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 52 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 5 May '20

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-J41 - "14:17 UT" - 2020 JN


MPEC 2020-J40 - "13:33 UT" - 2020 JM


<< DOU on 5 May '20 >>  MPEC 2020-J39 - "12:04 UT" - Daily Orbit Update


MPEC 2020-J38 - "11:49 UT" - 2020 JL

Observers  on 5 May '20

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

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2020 DT3
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2020-J39 -- 2020 JJ
T05ATLAS Haleakala in Hawaii, 14 in MPEC 2020-J39 -- 2020 HT7, 2020 BO5, 2014 JO25, 2000 HO40, 99935, 54401, 428086, 36183, 349063, 19764, 169675, 11284, 8014, 1685
T08ATLAS Mauna Loa in Hawaii, 14 in MPEC 2020-J39 -- 2020 JH, 2020 FB6, 2015 TX143, 90075, 85275, 68350, 436030, 40267, 184990, 137170, 8566, 4055, 2102, 1627
160Castelmartini Obs. in Italy, 12 in MPEC 2020-J39 -- 2020 FB6, 2017 ME, 2002 VR85, 85628, 85275, 68350, 522684, 498066, 436030, 433992, 184990, 136874
703Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2020-J39 & 2020-J41 -- 2020 JN, 2020 GD2, 2020 FW3, 2014 JO25, 2010 JJ3, 2002 XQ40, 2000 HO40, 54401, 522684, 436030, 433992, 186822, 163243, 145656, 136874, 3288, 1917, 1864
203GiaGa Obs. in Italy, 3 in MPECs 2020-J39 & 2020-J41 -- 2020 JN, 2020 HB6, 2016 HP6
J95Great Shefford Obs. in England, 1 in MPEC 2020-J41 -- 2020 JN
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2020-J39 -- 2020 JA, 2020 BZ12
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-J41 -- 2020 JN
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-J39 -- 388945
K38M57 Obs. in Italy, 1 in MPEC 2020-J39 -- 2020 FA7
K95MASTER-II Sutherland in South Africa, 1 in MPEC 2020-J39 -- 36183
L64MPC code L64, 1 in MPEC 2020-J39 -- 68350
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2020-J38, 2020-J39 & 2020-J40 -- 2020 JM, 2020 JL, 2020 HT6, 2020 HH6, 2020 HB10, 2020 FO2, 86067, 68350, 430439, 187026, 184990, 144861, 108906, 8566, 4257
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2020-J38 & 2020-J39 -- 2020 JL, 2020 HV1, 2018 TO1, 500094, 313809, 162195, 5751
F52Pan-STARRS 2 (PS2) in Hawaii, 10 in MPEC 2020-J39 -- 2020 JD, 2020 JB, 2020 HW9, 2020 FB6, 68350, 436030, 219021, 115052, 4055, 2102
K63Pascoli Obs. in Italy, 1 in MPEC 2020-J41 -- 2020 JN
V93Pin Oak Obs., 5 in MPEC 2020-J39 -- 99935, 388945, 175189, 138847, 1627
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPEC 2020-J39 -- 2020 JH, 2020 JD
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 3 in MPECs 2020-J38, 2020-J39 & 2020-J40 -- 2020 JM, 2020 JL, 2020 JH
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2020-J39 -- 231792, 137199
C95SATINO-1 in France, 1 in MPEC 2020-J39 -- 2020 CF2
204Schiaparelli Obs. in Italy, 2 in MPECs 2020-J40 & 2020-J41 -- 2020 JN, 2020 JM
I52Steward Obs. Mt. Lemmon Station in Arizona, 9 in MPECs 2020-J38, 2020-J39, 2020-J40 & 2020-J41 -- 2020 JN, 2020 JM, 2020 JL, 2020 HT6, 2020 HS1, 2020 HO8, 2020 HL6, 2020 HH6, 2020 HC10
858Tebbutt Obs. in New Mexico, 1 in MPEC 2020-J41 -- 2020 JN
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-J39 -- 2018 UL
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-J38, 2020-J40 & 2020-J41 -- 2020 JN, 2020 JM, 2020 JL
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2020-J39 -- 2006 UD63, 68350, 436324, 9400, 3103
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 May '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2355 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 JKNEODyS16302057-2118671.01e-05-4.63-5.510NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2020-05-02.381 to 2020-05-04.027."
2020 HL6JPL Sentry16302103-210312.023e-07-8.55-8.550JPL: Computed at 06:47 today Pacific time based on 44 observations spanning 15.819 days (2020-Apr-19.44533 to 2020-May-05.26466). Diameter approximately 0.009 km. from weighted mean H=27.99.
NEODyS16302101-210322.33e-07-8.49-8.510NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-04-19.446 to 2020-05-05.265."
2020 CF2JPL Sentry16302072-211696.730841e-06-6.89-7.190JPL: Computed at 06:55 today Pacific time based on 101 observations spanning 40.114 days (2020-Feb-13.349028 to 2020-Mar-24.462702). Diameter approximately 0.010 km. from weighted mean H=27.59.
NEODyS16302096-2117186.17e-06-6.95-7.370NEODyS: "Based on 106 optical observations (of which 6 are rejected as outliers) from 2020-02-13.349 to 2020-03-24.464."
2018 ULJPL Sentry1630R E M O V E DJPL: Risk listing removed at 1347 UTC today
2017 AE21JPL Sentry16302021-2117964.6395967e-06-4.73-5.220JPL: Computed at 21:08 April 8th of 2017 Pacific time based on 5 observations spanning 1.0383 days (2017-Jan-03.52485 to 2017-Jan-04.563112). Diameter approximately 0.033 km. from weighted mean H=25.03.

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 5 May '20

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

1630Noted that JPL Sentry has updated its 2017 AE21 risk assessment - see above
Noted that JPL Sentry has removed 2018 UL as an impact risk - see above
Noted that JPL Sentry has updated its 2020 CF2 risk assessment - see above
Noted that NEODyS has updated its 2020 CF2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HL6 risk assessment - see above
Noted that NEODyS has updated its 2020 HL6 risk assessment - see above
Noted that NEODyS has posted 2020 JK as an impact risk - see above
Grabbed MPEC 2020-J38 - 2020 JL - see above
Grabbed MPEC 2020-J39 - Daily Orbit Update - see above
Grabbed MPEC 2020-J40 - 2020 JM - see above
Grabbed MPEC 2020-J41 - 2020 JN - see above
Noted Radar Astrometry database update - see above