Contents  on 27 April '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 27 April '20

The MPC's NEO Confirmation Page has 124 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 124 objects listed. Of these, 80 were "one nighters." So far The Tracking News has counted a total of 138 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 27 April '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-H201 - "23:37 UT" - 2009 HU77


MPEC 2020-H200 - "15:00 UT" - 2008 YK2


MPEC 2020-H199 - "14:40 UT" - 2020 HF7


MPEC 2020-H198 - "14:31 UT" - 2020 HE7


MPEC 2020-H197 - "12:51 UT" - Cessation of Automatic Minor Planet Electronic Circulars for High Eccentricity Asteroids


MPEC 2020-H196 - "12:48 UT" - 2020 HD7


<< DOU on 27 April '20 >>  MPEC 2020-H195 - "12:12 UT" - Daily Orbit Update


MPEC 2020-H194 - "02:15 UT" - 2020 HB7


MPEC 2020-H193 - "00:45 UT" - 2020 HA7

Observers  on 27 April '20

A total of 38 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-H196 & 2020-H198 -- 2020 HE7, 2020 HD7
T05ATLAS Haleakala in Hawaii, 20 in MPEC 2020-H195 -- 2020 GD2, 2020 BO5, 2017 FE90, 2014 JO25, 2010 JJ3, 2004 FF29, 2001 GS2, 2000 HO40, 99935, 54401, 394783, 19764, 169675, 142555, 136923, 11066, 7753, 6050, 4954, 1685
T08ATLAS Mauna Loa in Hawaii, 22 in MPEC 2020-H195 -- 2020 GF3, 2020 FB6, 68350, 524530, 468910, 436324, 436030, 425450, 40267, 388945, 373428, 34613, 318050, 184990, 18172, 137170, 115052, 7088, 5626, 4055, 2102, 1627
160Castelmartini Obs. in Italy, 3 in MPEC 2020-H195 -- 90075, 52768, 18172
703Catalina Sky Survey (CSS) in Arizona, 34 in MPEC 2020-H195 -- 2020 HY, 2020 HW6, 2020 HK3, 2020 GF3, 2020 FB6, 2019 XG1, 2017 FE90, 2015 FT118, 2011 FZ2, 2010 EC135, 90075, 85628, 539940, 510073, 477524, 468910, 433992, 40267, 395207, 388945, 373428, 368664, 34613, 318050, 26760, 18172, 163243, 137170, 115052, 11405, 6047, 5626, 4581, 2102
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 22 in MPECs 2020-H195, 2020-H199 & 2020-H201 -- 2020 HX5, 2020 HW5, 2020 HT5, 2020 HR4, 2020 HR3, 2020 HP2, 2020 HO2, 2020 HN2, 2020 HM3, 2020 HL5, 2020 HJ3, 2020 HJ1, 2020 HH5, 2020 HG4, 2020 HF7, 2020 HC2, 2020 GU2, 2020 GQ2, 2020 GC3, 2020 FW6, 2020 DX, 2009 HU77
734Farpoint Obs. in Kansas, 1 in MPEC 2020-H193 -- 2020 HA7
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-H195 -- 2020 HW6
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-H195 -- 52768
J95Great Shefford Obs. in England, 2 in MPEC 2020-H195 -- 2020 HW6, 2020 HP6
A17Guidestar Obs. in Germany, 5 in MPEC 2020-H195 -- 2020 HF5, 2017 ME, 2014 HO4, 2009 WZ7, 2003 OC3
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2020-H195 -- 2020 GD2
246KLENOT in the Czech Republic, 11 in MPECs 2020-H195 & 2020-H198 -- 2020 HW6, 2020 HW3, 2020 HV4, 2020 HU2, 2020 HQ4, 2020 HQ3, 2020 HN5, 2020 HK3, 2020 HE7, 2020 HB6, 2020 GY2
K22Les Barres Obs. in France, 1 in MPEC 2020-H195 -- 52768
G96Mt. Lemmon Survey (MLS) in Arizona, 34 in MPECs 2020-H195, 2020-H198, 2020-H199 & 2020-H201 -- 2020 HR, 2020 HQ3, 2020 HO1, 2020 HM2, 2020 HF7, 2020 HE7, 2020 HE4, 2020 GD2, 2020 BR16, 2020 AZ2, 2019 YW3, 2016 RW33, 2014 UA192, 2009 HU77, 2000 EM26, 1998 HN3, 86667, 85989, 68063, 442037, 390929, 218863, 186822, 163679, 162422, 152941, 145656, 142781, 137064, 136923, 11066, 7753, 7358, 1221
Z80Northolt Branch Obs. in England, 1 in MPEC 2020-H195 -- 2020 HW3
G34Oberfrauendorf Obs. in Germany, 1 in MPEC 2020-H195 -- 2020 HW6
F51Pan-STARRS 1 (PS1) in Hawaii, 37 in MPECs 2020-H193, 2020-H194, 2020-H195 & 2020-H196 -- 2020 HZ4, 2020 HV5, 2020 HR1, 2020 HM6, 2020 HM4, 2020 HD7, 2020 HD6, 2020 HD2, 2020 HB7, 2020 HA7, 2020 GN3, 2020 AZ2, 2019 XV3, 2017 DS36, 2015 HB10, 2014 UA192, 2011 HO4, 2007 HX82, 2004 RE84, 2003 JN14, 2000 EM26, 522684, 510262, 495323, 411655, 399325, 329275, 31345, 306462, 277142, 275976, 189973, 164400, 162422, 16064, 152941, 1917
F52Pan-STARRS 2 (PS2) in Hawaii, 22 in MPECs 2020-H193 & 2020-H195 -- 2020 HL4, 2020 HK3, 2020 HH6, 2020 HA7, 2020 FB6, 2020 BR16, 2019 YD2, 2019 XN1, 2016 RW33, 2016 LE9, 2010 FC6, 2006 GX2, 2004 QZ1, 68350, 448818, 391033, 325769, 306462, 243298, 186822, 142555, 7358
W16Pleasant Groves Obs., 1 in MPEC 2020-H195 -- 2003 JN14
D29Purple Mtn. Obs. Xuyi Station in China, 7 in MPEC 2020-H195 -- 2004 FF29, 242216, 231792, 186822, 18109, 136923, 6050
L18QOS Obs., 1 in MPEC 2020-H195 -- 2020 HF5
233San Vito Obs. in Italy, 2 in MPEC 2020-H195 -- 52768, 388945
C95SATINO-1 in France, 1 in MPEC 2020-H195 -- 2020 BL8
L38Schafsweide Obs., 3 in MPEC 2020-H195 -- 184990, 141525, 136618
204Schiaparelli Obs. in Italy, 14 in MPEC 2020-H195 -- 2020 HX3, 2020 HW3, 2020 HV4, 2020 HU3, 2020 HO5, 2020 HO1, 2020 HN5, 2020 HM5, 2020 HM, 2020 GZ2, 2020 GN2, 2020 GJ2, 2020 GD2, 539940
033Schwarzschild Obs. in Germany, 7 in MPECs 2020-H193, 2020-H195 & 2020-H199 -- 2020 HY6, 2020 HW6, 2020 HW3, 2020 HV4, 2020 HN5, 2020 HF7, 2020 HA7
K14Sencelles Obs. in Spain, 1 in MPEC 2020-H195 -- 52768
G40"G. Gasparovic in Croatia via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-H195 -- 52768
Y00SONEAR in Brazil, 3 in MPEC 2020-H195 -- 2014 JO25, 86667, 20826
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-H195 -- 2020 HW6
I52Steward Obs. Mt. Lemmon Station in Arizona, 33 in MPECs 2020-H193, 2020-H195, 2020-H198 & 2020-H201 -- 2020 HZ4, 2020 HW1, 2020 HV1, 2020 HU5, 2020 HT4, 2020 HT3, 2020 HR1, 2020 HQ4, 2020 HQ1, 2020 HN5, 2020 HM5, 2020 HM4, 2020 HM2, 2020 HJ, 2020 HH2, 2020 HG2, 2020 HF3, 2020 HF2, 2020 HE7, 2020 HE6, 2020 HD5, 2020 HC1, 2020 HB6, 2020 HB2, 2020 HA7, 2020 GR2, 2020 GJ2, 2020 GF3, 2020 GE3, 2020 FX4, 2020 DG2, 2019 WB6, 2009 HU77
673!Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 1 in MPEC 2020-H193 -- 2020 HA7
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-H200 -- 2008 YK2
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-H195, 2020-H198 & 2020-H199 -- 2020 HF7, 2020 HE7, 2020 HA7
G23Vulpecula Obs., 1 in MPEC 2020-H195 -- 52768
718Wiggins Obs. in Utah, 1 in MPEC 2020-H195 -- 52768
I41Zwicky Transient Facility (ZTF) in southern California, 9 in MPEC 2020-H195 -- 2020 HW1, 2019 XG1, 86067, 494880, 373428, 318050, 210012, 15745, 154453
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 April '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 HE7JPL Sentry16002071-211437.27593e-08-9.28-9.280JPL: Computed at 08:35 today Pacific time based on 20 observations spanning .85866 days (2020-Apr-26.32906 to 2020-Apr-27.187723). Diameter approximately 0.006 km. from weighted mean H=28.87.
2020 HM6JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1534 UTC today
NEODyS16002083-210741.89e-08-8.53-8.650NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2020-04-24.351 to 2020-04-26.468."
2020 HV5JPL Sentry16002091-209111.887e-07-7.32-7.320JPL: Computed at 08:27 today Pacific time based on 17 observations spanning 5.0450 days (2020-Apr-21.360523 to 2020-Apr-26.40548). Diameter approximately 0.023 km. from weighted mean H=25.81.
2020 HQ4JPL Sentry17172052-2119470.000143231475-4.98-5.390JPL #2 for the day: Computed at 10:11 today Pacific time based on 72 observations spanning 4.9957 days (2020-Apr-22.14953 to 2020-Apr-27.1452). Diameter approximately 0.015 km. from weighted mean H=26.81.
NEODyS16002051-21171451.41e-04-5.02-5.40NEODyS: "Based on 75 optical observations (of which 1 are rejected as outliers) from 2020-04-22.150 to 2020-04-27.146."
2020 HM4JPL Sentry16002061-206111.618e-07-6.35-6.350JPL: Computed at 08:29 today Pacific time based on 24 observations spanning 6.7957 days (2020-Apr-20.3758 to 2020-Apr-27.17154). Diameter approximately 0.038 km. from weighted mean H=24.72.
NEODyS1600206121.58e-07-6.38-6.40NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-04-20.377 to 2020-04-27.172."
2020 HJ4JPL Sentry17172054-2118304.6718647e-06-2.95-3.240JPL: Computed at 10:00 today Pacific time based on 28 observations spanning 6.8349 days (2020-Apr-19.463036 to 2020-Apr-26.29795). Diameter approximately 0.320 km. from weighted mean H=20.11.
NEODyS16002054-2118331.69e-06-3.43-3.80NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2020-04-19.464 to 2020-04-26.299."
2020 HK3NEODyS1600207311.33e-08-7.21-7.210NEODyS: "Based on 59 optical observations (of which 0 are rejected as outliers) from 2020-04-19.547 to 2020-04-26.919."
2020 GZ2JPL Sentry16002049-205440.0002218425-4.97-4.970JPL: Computed at 08:21 today Pacific time based on 41 observations spanning 4.5801 days (2020-Apr-15.39078 to 2020-Apr-19.970926). Diameter approximately 0.008 km. from weighted mean H=28.09.
NEODyS16002049-205437.44e-05-5.46-5.460NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-04-15.392 to 2020-04-19.972."
2020 GY2JPL Sentry16002093-209311.311e-06-5.28-5.280JPL: Computed at 08:08 today Pacific time based on 90 observations spanning 10.735 days (2020-Apr-15.34915 to 2020-Apr-26.08405). Diameter approximately 0.063 km. from weighted mean H=23.65.
NEODyS16002089-211242.3e-06-5.05-5.070NEODyS: "Based on 90 optical observations (of which 1 are rejected as outliers) from 2020-04-15.350 to 2020-04-26.085."
2020 FT3JPL Sentry17172089-2119133.638261e-05-3.80-3.830JPL: Computed at 10:03 today Pacific time based on 42 observations spanning 34.607 days (2020-Mar-22.30472 to 2020-Apr-25.91201). Diameter approximately 0.079 km. from weighted mean H=23.16.
NEODyS16002089-2118232.13e-05-4.06-4.110NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2020-03-22.306 to 2020-04-25.913."

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 27 April '20

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

2358Grabbed MPEC 2020-H201 - 2009 HU77 - see above
1717Noted that JPL Sentry has updated its 2020 FT3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HJ4 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HQ4 risk assessment - see above
1600Noted that NEODyS has updated its 2020 FT3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GY2 risk assessment - see above
Noted that NEODyS has updated its 2020 GY2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GZ2 risk assessment - see above
Noted that NEODyS has updated its 2020 GZ2 risk assessment - see above
Noted that JPL Sentry has posted 2020 HE7 as an impact risk - see above
Noted that NEODyS has updated its 2020 HJ4 risk assessment - see above
Noted that NEODyS has updated its 2020 HK3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HM4 risk assessment - see above
Noted that NEODyS has updated its 2020 HM4 risk assessment - see above
Noted that JPL Sentry has removed 2020 HM6 as an impact risk - see above
Noted that NEODyS has updated its 2020 HM6 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HQ4 risk assessment - see above
Noted that NEODyS has updated its 2020 HQ4 risk assessment - see above
Noted that JPL Sentry has posted 2020 HV5 as an impact risk - see above
Grabbed MPEC 2020-H195 - Daily Orbit Update - see above
Grabbed MPEC 2020-H196 - 2020 HD7 - see above
Grabbed MPEC 2020-H197 - Cessation of Automatic Minor Planet Electronic Circulars for High Eccentricity Asteroids - see above
Grabbed MPEC 2020-H198 - 2020 HE7 - see above
Grabbed MPEC 2020-H199 - 2020 HF7 - see above
Grabbed MPEC 2020-H200 - 2008 YK2 - see above
0536Grabbed MPEC 2020-H194 - 2020 HB7 - see above
0100Grabbed MPEC 2020-H193 - 2020 HA7 - see above