Contents  on 28 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 28 May '20

The MPC's NEO Confirmation Page has 55 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 34 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 28 May '20

Minor Planet Electronic Circulars

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


MPEC 2020-K211 - "15:01 UT" - 2017 OV68


MPEC 2020-K210 - "15:00 UT" - 2007 SV2


<< DOU on 28 May '20 >>  MPEC 2020-K209 - "12:06 UT" - Daily Orbit Update


MPEC 2020-K208 - "11:31 UT" - 2020 KA6


MPEC 2020-K207 - "11:29 UT" - 2020 KZ5


MPEC 2020-K206 - "07:57 UT" - 2020 KY5


MPEC 2020-K205 - "03:29 UT" - Comet C/2020 K5 (Panstarrs)


MPEC 2020-K204 - "00:09 UT" - 2020 KW5

Observers  on 28 May '20

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2020-K205 -- C/2020 K5
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2020-K209 -- 137199
T08ATLAS Mauna Loa in Hawaii, 5 in MPEC 2020-K209 -- 2013 XA22, 2006 UD63, 498066, 142555, 1917
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2020-K205 -- C/2020 K5
X74Campo dos Amarais Obs., 1 in MPEC 2020-K209 -- 20826
235CAST Obs. in Italy, 1 in MPEC 2020-K209 -- 2007 DA
160Castelmartini Obs. in Italy, 13 in MPEC 2020-K209 -- 2020 KV5, 2017 ME, 2014 LW21, 2006 UD63, 85989, 498066, 477885, 331471, 159608, 152756, 145656, 137170, 7977
703Catalina Sky Survey (CSS) in Arizona, 11 in MPEC 2020-K209 -- 2020 JG2, 474549, 308242, 184990, 163693, 137199, 108906, 106589, 105140, 4257, 1866
B21Gaisberg Obs. in Austria, 1 in MPEC 2020-K209 -- 2007 DQ40
X31Galilei Obs., 1 in MPEC 2020-K204 -- 2020 KW5
J95Great Shefford Obs. in England, 4 in MPEC 2020-K209 -- 2020 KV5, 2020 KJ4, 2020 KJ3, 2020 KF5
A17Guidestar Obs. in Germany, 2 in MPEC 2020-K209 -- 2013 XA22, 2007 EK26
1861program code 1 via Kitab Obs., 1 in MPEC 2020-K209 -- 99935
Z43Landehen Obs., 1 in MPEC 2020-K209 -- 85184
568^R. Wainscoat on Mauna Kea in Hawaii, 2 in MPECs 2020-K205 & 2020-K209 -- C/2020 K5, 2020 HF3
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2020-K209 -- 2013 XA22
118Modra Obs. in Slovakia, 1 in MPEC 2020-K205 -- C/2020 K5
474Mt. John Obs. in New Zealand, 16 in MPECs 2020-K204, 2020-K207, 2020-K208, 2020-K209 & 2020-K211 -- 2020 KZ5, 2020 KW5, 2020 KS3, 2020 KA6, 2020 JZ, 2020 JY, 2020 HV9, 2020 HH10, 2020 HF2, 2020 FU6, 2019 YJ4, 2019 YH4, 2019 PC3, 2017 OV68, 2016 QU1, 2015 GZ13
G96Mt. Lemmon Survey (MLS) in Arizona, 22 in MPECs 2020-K204, 2020-K207, 2020-K208 & 2020-K209 -- 2020 KZ5, 2020 KW5, 2020 KA6, 2020 JV, 2020 JR3, 2020 JR, 2020 JL3, 2020 HG6, 2020 FH6, 2016 EL84, 2014 JO25, 2012 QG8, 2010 JK33, 2002 XP40, 2000 AH205, 99935, 36183, 330825, 276891, 137064, 9950, 4954
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-K209 -- 2020 KV, 2020 KJ4, 6569
C23Olmen Obs. in Belgium, 1 in MPEC 2020-K209 -- 2020 KV5
557Ondrejov Obs. in the Czech Republic, 4 in MPEC 2020-K209 -- 2000 KA, 86667, 85184, 175189
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2020-K205, 2020-K206 & 2020-K209 -- 2020 KY5, 2020 KU5, C/2020 K5, 477885
F51^program code "^" (28) via Pan-STARRS 1 in Hawaii, 1 in MPEC 2020-K205 -- C/2020 K5
F52Pan-STARRS 2 (PS2) in Hawaii, 6 in MPECs 2020-K206, 2020-K207 & 2020-K209 -- 2020 KZ5, 2020 KY5, 2020 KU5, 86067, 483878, 144861
F52^program code "^" (28) via Pan-STARRS 2 in Hawaii, 1 in MPEC 2020-K205 -- C/2020 K5
D29Purple Mtn. Obs. Xuyi Station in China, 7 in MPEC 2020-K209 -- 2020 KJ1, 86667, 85184, 68350, 436030, 184990, 159929
104San Marcello Pistoiese Obs. in Italy, 6 in MPECs 2020-K204 & 2020-K209 -- 2020 KW5, 2020 KV5, 2020 BO5, 522684, 436030, 136874
233San Vito Obs. in Italy, 1 in MPEC 2020-K209 -- 86667
C95SATINO-1 in France, 1 in MPEC 2020-K209 -- 5189
204Schiaparelli Obs. in Italy, 1 in MPEC 2020-K205 -- C/2020 K5
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-K209 -- 2017 QM18
I52Steward Obs. Mt. Lemmon Station in Arizona, 26 in MPECs 2020-K204, 2020-K207, 2020-K208 & 2020-K209 -- 2020 KZ5, 2020 KZ3, 2020 KY3, 2020 KW5, 2020 KV1, 2020 KV, 2020 KU1, 2020 KS, 2020 KR5, 2020 KR4, 2020 KQ4, 2020 KQ1, 2020 KP3, 2020 KO5, 2020 KN2, 2020 KL4, 2020 KK4, 2020 KG5, 2020 KG4, 2020 KE4, 2020 KD2, 2020 KC5, 2020 KB5, 2020 KA6, 2020 JR3, 2012 SA22
A16Tentlingen Obs. in Switzerland, 6 in MPEC 2020-K209 -- 2013 XA22, 68348, 66251, 190166, 136874, 4954
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPECs 2020-K209 & 2020-K210 -- 2016 CA193, 2007 SV2
L01Visnjan Obs. in Croatia, 4 in MPECs 2020-K204, 2020-K205, 2020-K206 & 2020-K207 -- 2020 KZ5, 2020 KY5, 2020 KW5, C/2020 K5
C51WISE in Earth polar orbit, 3 in MPEC 2020-K209 -- 2020 HV1, 2014 LQ26, 159608
I41Zwicky Transient Facility (ZTF) in southern California, 7 in MPEC 2020-K209 -- 2020 KC5, 68350, 54686, 477885, 231792, 7977, 4954
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 KO5JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1513 UTC today
2020 KC5JPL Sentry18002077-211894.72372e-05-5.69-5.730JPL: Computed at 07:55 today Pacific time based on 22 observations spanning 1.9265 days (2020-May-26.365344 to 2020-May-28.291829). Diameter approximately 0.012 km. from weighted mean H=27.32.
2020 KR4JPL Sentry18002098-209838.26e-09-5.75-6.080JPL: Computed at 07:58 today Pacific time based on 24 observations spanning 10.827 days (2020-May-17.473505 to 2020-May-28.30086). Diameter approximately 0.230 km. from weighted mean H=20.87.
NEODyS18002094-209863.07e-08-5.22-5.470NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2020-05-17.474 to 2020-05-27.298."
2020 KJ4JPL Sentry18002096-210622.2544799e-06-8.45-8.450JPL: Computed at 08:01 today Pacific time based on 44 observations spanning 6.5808 days (2020-May-21.442349 to 2020-May-28.023134). Diameter approximately 0.004 km. from weighted mean H=29.89.
NEODyS18002076-210651.74e-06-8.55-8.560NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2020-05-21.443 to 2020-05-27.222."
2020 KN3NEODyS1800R E M O V E D-
2020 KB3NEODyS18002052-207221.6e-06-5.47-5.470NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2020-05-20.376 to 2020-05-27.248."
2020 KN2JPL Sentry18002063-2119163.0804869e-05-5.30-5.320JPL: Computed at 07:53 today Pacific time based on 53 observations spanning 7.8698 days (2020-May-20.412007 to 2020-May-28.28178). Diameter approximately 0.017 km. from weighted mean H=26.48.
NEODyS18002063-2117171.63e-05-5.59-5.620NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2020-05-20.413 to 2020-05-27.231."
2020 KSJPL Sentry18002064-2119195.1980278e-05-4.88-5.040JPL: Computed at 07:44 today Pacific time based on 105 observations spanning 11.759 days (2020-May-16.491732 to 2020-May-28.25067). Diameter approximately 0.024 km. from weighted mean H=25.77.
2014 KW76JPL Sentry18002115-211512.723e-07-8.20-8.200JPL: Computed at 11:42 April 9th of 2017 Pacific time based on 34 observations spanning 4.1077 days (2014-May-28.36796 to 2014-Jun-01.47563). Diameter approximately 0.008 km. from weighted mean H=28.04.
2008 LEJPL Sentry18002020-21161212.3197952e-06-5.62-6.080JPL: Computed at 08:29 April 13th of 2017 Pacific time based on 12 observations spanning .14395 days (2008-Jun-02.29414 to 2008-Jun-02.43809). Diameter approximately 0.022 km. from weighted mean H=25.98.

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 May '20

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

1800Noted that JPL Sentry has updated its 2008 LE risk assessment - see above
Noted that JPL Sentry has updated its 2014 KW76 risk assessment - see above
Noted that NEODyS has updated its 2020 KB3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KC5 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KJ4 risk assessment - see above
Noted that NEODyS has updated its 2020 KJ4 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KN2 risk assessment - see above
Noted that NEODyS has updated its 2020 KN2 risk assessment - see above
Noted that NEODyS has removed 2020 KN3 as an impact risk - see above
Noted that JPL Sentry has removed 2020 KO5 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 KR4 risk assessment - see above
Noted that NEODyS has updated its 2020 KR4 risk assessment - see above
Noted that JPL Sentry has updated its 2020 KS risk assessment - see above
Grabbed MPEC 2020-K206 - 2020 KY5 - see above
Grabbed MPEC 2020-K207 - 2020 KZ5 - see above
Grabbed MPEC 2020-K208 - 2020 KA6 - see above
Grabbed MPEC 2020-K209 - Daily Orbit Update - see above
Grabbed MPEC 2020-K210 - 2007 SV2 - see above
Grabbed MPEC 2020-K211 - 2017 OV68 - see above
0432Grabbed MPEC 2020-K204 - 2020 KW5 - see above
Grabbed MPEC 2020-K205 - Comet C/2020 K5 (Panstarrs) - see above