Contents  on 4 June '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.

NEOCP Activity  on 4 June '20

The MPC's NEO Confirmation Page has 35 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 35 objects listed. Of these, 25 were "one nighters." So far The Tracking News has counted a total of 39 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 4 June '20

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-L23 - "17:25 UT" - 2016 GB277


MPEC 2020-L22 - "16:35 UT" - 2016 GA277


MPEC 2020-L21 - "16:09 UT" - 2016 TQ120


MPEC 2020-L20 - "15:52 UT" - 2016 TP120


<< DOU on 4 June '20 >>  MPEC 2020-L19 - "12:00 UT" - Daily Orbit Update

Observers  on 4 June '20

Nineteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2020-L19 -- 2020 KS6, 2020 KN4, 2020 KE4, 2020 HH6, 2010 EC135, 184990
T05ATLAS Haleakala in Hawaii, 13 in MPEC 2020-L19 -- 2020 KN4, 90075, 86667, 85713, 331471, 163243, 159608, 138847, 137199, 136874, 7977, 4055, 1627
T08ATLAS Mauna Loa in Hawaii, 13 in MPEC 2020-L19 -- 2017 ME, 2006 HB, 99935, 513170, 420302, 382503, 349063, 169675, 138911, 6053, 5751, 4179, 2102
L65Bredenkamp Obs., 2 in MPEC 2020-L19 -- 331471, 137199
160Castelmartini Obs. in Italy, 4 in MPEC 2020-L19 -- 2006 UD63, 85989, 513170, 152756
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2020-L19 -- 85184, 184990, 154278, 108906, 10860, 106589
807.Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2020-L20 & 2020-L21 -- 2016 TQ120, 2016 TP120
U55Golden Ears Obs., 1 in MPEC 2020-L19 -- 2010 EC135
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-L19 -- 137199
304.program code "." (23) via Las Campanas Obs. in Chile, 2 in MPECs 2020-L20 & 2020-L21 -- 2016 TQ120, 2016 TP120
3045program code 5 via Las Campanas Obs. in Chile, 2 in MPECs 2020-L22 & 2020-L23 -- 2016 GB277, 2016 GA277
L09LCO Sutherland Aqawan A#1 in South Africa, 1 in MPEC 2020-L19 -- 242450
5685Scott Sheppard on Mauna Kea in Hawaii, 2 in MPECs 2020-L22 & 2020-L23 -- 2016 GB277, 2016 GA277
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPEC 2020-L19 -- 86067, 85184, 53430, 363617, 163693, 159929, 144861, 4257, 1981
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2020-L19 -- 2020 FW3, 1998 MR24, 230979, 184990
F52Pan-STARRS 2 (PS2) in Hawaii, 3 in MPEC 2020-L19 -- 86666, 68350, 163250
C95SATINO-1 in France, 1 in MPEC 2020-L19 -- 6239
I52Steward Obs. Mt. Lemmon Station in Arizona, 16 in MPEC 2020-L19 -- 2020 KR5, 2020 KQ1, 2020 KO3, 2020 KN4, 2020 KN3, 2020 KG4, 2020 KD2, 2020 KB7, 2020 KA7, 2020 JT, 2020 JD, 2020 HO10, 2020 HC10, 2020 FW3, 2015 FP332, 2008 QV11
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-L19 -- 2016 GB1, 2016 FY12
C51WISE in Earth polar orbit, 3 in MPEC 2020-L19 -- 2014 LQ26, 99935, 20826
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 June '20

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 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
2019 KJ4JPL Sentry21152059-2118838.36306426e-05-5.47-6.260JPL: Computed at 15:19 July 27th of 2019 Pacific time based on 29 observations spanning 7.9430 days (2019-May-31.318726 to 2019-Jun-08.261769). Diameter approximately 0.012 km. from weighted mean H=27.24.
2014 LY21JPL Sentry21152021-21169698.32562620999998e-05-4.88-5.120JPL: Computed at 18:09 April 8th of 2017 Pacific time based on 11 observations spanning .04506 days (2014-Jun-02.41612 to 2014-Jun-02.46118). Diameter approximately 0.005 km. from weighted mean H=29.25.
2010 XB73JPL Sentry21152023-2110502.783641e-07-5.02-5.680JPL: Computed at 20:52 April 7th of 2017 Pacific time based on 18 observations spanning 1.0847 days (2010-Dec-14.13028 to 2010-Dec-15.21496). Diameter approximately 0.110 km. from weighted mean H=22.50.
2010 JH110JPL Sentry21152071-210257.52814e-05-5.01-5.170JPL: Computed at 17:02 April 7th of 2017 Pacific time based on 60 observations spanning 34.114 days (2010-May-15.30867 to 2010-Jun-18.42252). Diameter approximately 0.019 km. from weighted mean H=26.29.

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 4 June '20

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

2115Noted that JPL Sentry has updated its 2010 JH110 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XB73 risk assessment - see above
Noted that JPL Sentry has updated its 2014 LY21 risk assessment - see above
Noted that JPL Sentry has updated its 2019 KJ4 risk assessment - see above
Grabbed MPEC 2020-L23 - 2016 GB277 - see above
1701Grabbed MPEC 2020-L22 - 2016 GA277 - see above
1634Grabbed MPEC 2020-L21 - 2016 TQ120 - see above
1600Grabbed MPEC 2020-L19 - Daily Orbit Update - see above
Grabbed MPEC 2020-L20 - 2016 TP120 - see above