Contents  on 31 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.

NEOCP Activity  on 31 May '20

The MPC's NEO Confirmation Page has 54 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 54 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 66 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 May '20

Minor Planet Electronic Circulars

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


MPEC 2020-K235 - "21:04 UT" - 2020 KJ7


MPEC 2020-K234 - "20:55 UT" - 2020 KH7


MPEC 2020-K233 - "18:41 UT" - 2020 KE7


MPEC 2020-K232 - "18:38 UT" - 2020 KD7


MPEC 2020-K231 - "18:37 UT" - 2020 KC7


MPEC 2020-K230 - "15:00 UT" - 2013 LF1


<< DOU on 31 May '20 >>  MPEC 2020-K229 - "12:01 UT" - Daily Orbit Update


MPEC 2020-K228 - "11:57 UT" - 2020 KB7


MPEC 2020-K227 - "02:39 UT" - 2020 KA7

Observers  on 31 May '20

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2020-K229 -- 23187
H21Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2020-K227, 2020-K228, 2020-K229 & 2020-K234 -- 2020 KT3, 2020 KL3, 2020 KH7, 2020 KB7, 2020 KB2, 2020 KA7, 2020 JZ2, 2020 HY10, 2020 HJ10, 2135
T05ATLAS Haleakala in Hawaii, 21 in MPEC 2020-K229 -- 2020 FW3, 2010 EC135, 86667, 85275, 85184, 68350, 35107, 333555, 331471, 318050, 159929, 159608, 152756, 145656, 137199, 137170, 136874, 7977, 6569, 4055, 1917
T08ATLAS Mauna Loa in Hawaii, 25 in MPECs 2020-K228 & 2020-K229 -- 2020 KG4, 2020 KB7, 2020 BO5, 2019 UO9, 2005 MR5, 2001 QC34, 99935, 54401, 495891, 428086, 420302, 415711, 369264, 36183, 349063, 19764, 192563, 141078, 137064, 8014, 6050, 5751, 4954, 4179, 3691
703Catalina Sky Survey in Arizona, 1 in MPEC 2020-K229 -- 137170
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-K229 -- 2016 LY47
Z99Clixby Obs. in England, 4 in MPECs 2020-K228 & 2020-K229 -- 2020 KZ4, 2020 KB7, 2013 XA22, 2010 EC135
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2020-K229 -- 2006 BR98
734Farpoint Obs. in Kansas, 1 in MPEC 2020-K227 -- 2020 KA7
C18Frasnes-Lez-Anvaing Obs. in Belgium, 1 in MPEC 2020-K229 -- 2013 XA22
U76Glendora Obs., 1 in MPEC 2020-K229 -- 137199
J95Great Shefford Obs. in England, 3 in MPECs 2020-K227, 2020-K228 & 2020-K229 -- 2020 KB7, 2020 KA7, 2020 BN5
Z43Landehen Obs., 2 in MPEC 2020-K229 -- 477885, 184990
598Loiano Obs. in Italy, 1 in MPEC 2020-K227 -- 2020 KA7
W92MASTER OAFA Obs., 1 in MPEC 2020-K229 -- 8014
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-K235 -- 2020 KJ7
474Mt. John Obs. in New Zealand, 13 in MPECs 2020-K229, 2020-K231, 2020-K232 & 2020-K233 -- 2020 KY2, 2020 KV1, 2020 KQ4, 2020 KK3, 2020 KG4, 2020 KE7, 2020 KD7, 2020 KC7, 2020 KC, 2020 HV9, 2020 HT2, 2019 YH4, 2019 PC3
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2020-K227 -- 2020 KA7
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-K229 -- 2020 KC5
F51Pan-STARRS 1 (PS1) in Hawaii, 14 in MPECs 2020-K229, 2020-K231, 2020-K232, 2020-K233, 2020-K234 & 2020-K235 -- 2020 KJ7, 2020 KH7, 2020 KE7, 2020 KD7, 2020 KC7, 2020 JT, 2020 JL2, 2015 HH10, 68350, 518737, 498550, 228587, 142781, 5751
F52Pan-STARRS 2 (PS2) in Hawaii, 11 in MPECs 2020-K229 & 2020-K235 -- 2020 KR5, 2020 KJ7, 2020 KE2, 2020 JW1, 85184, 68350, 483878, 331471, 144861, 137199, 106589
V93Pin Oak Obs., 8 in MPEC 2020-K229 -- 2013 XA22, 86667, 495615, 184990, 175189, 137199, 136874, 8014
C95SATINO-1 in France, 1 in MPEC 2020-K229 -- 5646
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-K229 -- 2020 BN5
G403Tony Evans in Portugal via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-K229 -- 2020 KQ5
Y00SONEAR in Brazil, 1 in MPEC 2020-K229 -- 144411
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2020-K227 & 2020-K228 -- 2020 KB7, 2020 KA7
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-K227 -- 2020 KA7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-K230 -- 2013 LF1
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-K227 -- 2020 KA7
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2020-K229 -- 68350, 184990, 137199
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2020-K229 -- 2020 FH6, 86067, 54789, 506459, 231792
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 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.
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 KC5NEODyS23062105-210621.05e-08-9.45-9.470NEODyS #2 for the day: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2020-05-26.366 to 2020-05-30.065."
JPL Sentry17402083-210631.96446e-05-6.09-6.090JPL: Computed at 06:30 today Pacific time based on 44 observations spanning 3.6988 days (2020-May-26.365344 to 2020-May-30.064179). Diameter approximately 0.011 km. from weighted mean H=27.35.
2020 HW7NEODyS17402044-211769.81e-07-6.89-6.90NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2020-04-26.366 to 2020-04-30.209."
2020 AN3NEODyS1740R E M O V E D-
2006 BO7JPL Sentry17402060-211549.37333e-07-8.11-8.300JPL: Computed at 21:21 April 6th of 2017 Pacific time based on 15 observations spanning 1.7435 days (2006-Jan-22.35064 to 2006-Jan-24.094181). Diameter approximately 0.005 km. from weighted mean H=29.31.

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 May '20

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

2306Noted that NEODyS has updated its 2020 KC5 risk assessment - see above
2108Grabbed MPEC 2020-K231 - 2020 KC7 - see above
Grabbed MPEC 2020-K232 - 2020 KD7 - see above
Grabbed MPEC 2020-K233 - 2020 KE7 - see above
Grabbed MPEC 2020-K234 - 2020 KH7 - see above
Grabbed MPEC 2020-K235 - 2020 KJ7 - see above
1740Noted that JPL Sentry has updated its 2006 BO7 risk assessment - see above
Noted that NEODyS has removed 2020 AN3 as an impact risk - see above
Noted that NEODyS has updated its 2020 HW7 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KC5 risk assessment - see above
Noted that NEODyS has updated its 2020 KC5 risk assessment - see above
Grabbed MPEC 2020-K228 - 2020 KB7 - see above
Grabbed MPEC 2020-K229 - Daily Orbit Update - see above
Grabbed MPEC 2020-K230 - 2013 LF1 - see above
0500Grabbed MPEC 2020-K227 - 2020 KA7 - see above