Contents  on 8 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 8 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 2358 UTC when the database was dated 8 May

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

NEOCP Activity  on 8 May '20

The MPC's NEO Confirmation Page has 37 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, 22 were "one nighters." So far The Tracking News has counted a total of 38 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 8 May '20

Minor Planet Electronic Circulars

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

<< DOU on 8 May '20 >>  MPEC 2020-J48 - "12:05 UT" - Daily Orbit Update

MPEC 2020-J47 - "06:25 UT" - 2020 JS

Observers  on 8 May '20

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2020 HM4
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPEC 2020-J48 -- 2020 JH, 2020 JG, 2020 HY8, 2020 HW9, 2020 HW1, 2020 HL6, 2020 HF7, 2020 HB6, 2020 GF3, 2020 FW3, 2020 FW2, 2020 FB6, 2020 FA7, 2020 DV2, 2015 TX143, 2015 CL, 2010 EC135, 68350, 522684, 433992, 333555, 1917
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2020-J48 -- 137199
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2020-J48 -- 85275, 36284, 19764, 192563, 138847, 1685
160Castelmartini Obs. in Italy, 7 in MPEC 2020-J48 -- 2020 FB6, 85628, 68350, 522684, 436030, 433992, 136874
Z99Clixby Obs. in England, 1 in MPEC 2020-J48 -- 2020 JR
K87Dettelbach Vineyard Obs. in Germany, 2 in MPEC 2020-J48 -- 2020 JD, 2020 HC6
W46Foxfire Village Obs., 1 in MPEC 2020-J48 -- 159929
203GiaGa Obs. in Italy, 2 in MPEC 2020-J48 -- 2020 JH, 2020 HC6
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-J47 -- 2020 JS
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-J48 -- 2020 HC6, 2020 HB6, 2016 HP6
F52Pan-STARRS 2 (PS2) in Hawaii, 5 in MPEC 2020-J48 -- 2015 TX143, 416231, 274138, 26760, 154029
A48Povegliano Veronese Obs. in Italy, 1 in MPEC 2020-J48 -- 2020 HC6
C95SATINO-1 in France, 1 in MPEC 2020-J48 -- 2020 DJ
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-J47 -- 2020 JS
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-J48 -- 524530, 35107, 333555
W33Transit Dreams Obs., 2 in MPEC 2020-J48 -- 2020 JH, 2020 HB6
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-J48 -- 2019 QB1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 May '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.





Notes for Today's Latest Risk Assessments
2020 HY8JPL Sentry16502073-207315.350e-08-5.92-5.920JPL: Computed at 06:29 today Pacific time based on 46 observations spanning 6.9647 days (2020-Apr-27.38722 to 2020-May-04.35192). Diameter approximately 0.093 km. from weighted mean H=22.80.
NEODyS1650207316.04e-09-6.88-6.880NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2020-04-27.388 to 2020-05-04.353."
2020 HL6JPL Sentry16502103-210316.184e-08-8.99-8.990JPL: Computed at 06:52 today Pacific time based on 66 observations spanning 17.668 days (2020-Apr-19.44533 to 2020-May-07.113606). Diameter approximately 0.009 km. from weighted mean H=27.84.
2019 QB1JPL Sentry16502032-205321.0947e-07-7.77-7.990JPL: Computed at 06:29 today Pacific time based on 36 observations spanning 12.993 days (2019-Aug-22.52336 to 2019-Sep-04.516274). Diameter approximately 0.011 km. from weighted mean H=27.49.
NEODyS16502032-205326.95e-08-7.91-8.00NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2019-08-22.524 to 2019-09-04.517."

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 8 May '20

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

2358Noted Radar Astrometry database update - see above
1650Noted that JPL Sentry has updated its 2019 QB1 risk assessment - see above
Noted that NEODyS has updated its 2019 QB1 risk assessment - see above
Noted that JPL Sentry has reposted 2020 HL6 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 HY8 risk assessment - see above
Noted that NEODyS has updated its 2020 HY8 risk assessment - see above
Grabbed MPEC 2020-J47 - 2020 JS - see above
Grabbed MPEC 2020-J48 - Daily Orbit Update - see above