Contents  on 29 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 29 April '20

The MPC's NEO Confirmation Page has 116 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 116 objects listed. Of these, 75 were "one nighters." So far The Tracking News has counted a total of 132 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 29 April '20

Minor Planet Electronic Circulars

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


MPEC 2020-H234 - "22:36 UT" - 2020 HA9


MPEC 2020-H233 - "19:14 UT" - 2017 GT6


MPEC 2020-H232 - "19:13 UT" - 2006 GV2


MPEC 2020-H231 - "18:55 UT" - 2020 HY8


MPEC 2020-H230 - "12:55 UT" - 2020 HV8


<< DOU on 29 April '20 >>  MPEC 2020-H229 - "12:14 UT" - Daily Orbit Update


MPEC 2020-H228 - "11:50 UT" - 2020 HT8


MPEC 2020-H227 - "11:49 UT" - 2020 HS8


MPEC 2020-H226 - "11:47 UT" - 2020 HR8


MPEC 2020-H225 - "11:46 UT" - 2020 HQ8


MPEC 2020-H224 - "11:44 UT" - 2020 HP8


MPEC 2020-H223 - "11:43 UT" - 2020 HO8


MPEC 2020-H222 - "00:36 UT" - 2020 HN8

Observers  on 29 April '20

A total of 31 observers appear in today's MPECs.

CodeObserver / observatory
C97Al-Fulaij Obs., 1 in MPEC 2020-H229 -- 539940
A50Andrushivka Obs. in Ukraine, 1 in MPEC 2020-H229 -- 2020 HT7
H21Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2020-H223, 2020-H225, 2020-H227, 2020-H228 & 2020-H229 -- 2020 HU3, 2020 HT8, 2020 HS8, 2020 HQ8, 2020 HO8, 2020 HK5, 2020 HE1, 2020 HD1, 2020 GP1, 2020 FW6, 2020 FW2, 2020 FS1, 2019 YA, 2019 XG, 2010 GB6, 490684, 175729
T05ATLAS Haleakala in Hawaii, 26 in MPEC 2020-H229 -- 2020 HT7, 2020 HK3, 2020 GF3, 2020 FB6, 2011 FZ2, 2009 WZ7, 90075, 85275, 539940, 522684, 468910, 436030, 388945, 373428, 318050, 26760, 190166, 184990, 137170, 136618, 8566, 6047, 5626, 2102, 1864, 1627
T08ATLAS Mauna Loa in Hawaii, 23 in MPEC 2020-H229 -- 2020 HW6, 2020 HF1, 2020 HB6, 2020 GD2, 2020 BO5, 2014 JO25, 2010 JJ3, 2006 FH36, 2000 HO40, 99935, 54401, 394783, 36183, 349063, 19764, 169675, 142555, 141531, 11284, 8014, 4954, 3352, 1685
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2020-H229 -- 2020 FA7, 2015 TX143, 2015 FP332, 2010 XD11, 89830, 500094, 483878, 333555, 9400, 1866
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 8 in MPECs 2020-H228, 2020-H229, 2020-H230 & 2020-H234 -- 2020 HV8, 2020 HU1, 2020 HT8, 2020 HS5, 2020 HN4, 2020 HJ4, 2020 HE5, 2020 HA9
J37Huelva Obs. in Spain, 1 in MPEC 2020-H229 -- 52768
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-H229 -- 2020 HS7
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H229 -- 2020 HS7
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2020-H229 -- 2020 GF3
246KLENOT in the Czech Republic, 4 in MPECs 2020-H223, 2020-H224, 2020-H225 & 2020-H231 -- 2020 HY8, 2020 HQ8, 2020 HP8, 2020 HO8
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H229 -- 388945
938Linhaceira Obs. in Portugal, 1 in MPEC 2020-H229 -- 52768
474Mt. John Obs. in New Zealand, 7 in MPECs 2020-H223, 2020-H224, 2020-H226, 2020-H229 & 2020-H231 -- 2020 HY8, 2020 HY6, 2020 HR8, 2020 HP8, 2020 HO8, 2020 HN6, 2020 HL3
G96Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2020-H223, 2020-H224, 2020-H229, 2020-H230, 2020-H231, 2020-H232 & 2020-H233 -- 2020 HY8, 2020 HV8, 2020 HT7, 2020 HP8, 2020 HO8, 2020 HJ4, 2020 HH5, 2020 HH2, 2020 HE2, 2020 BG8, 2018 EE4, 2017 GT6, 2016 HP6, 2015 OL35, 2012 TB259, 2006 GV2, 523670, 491565, 482566, 468910, 465892, 436030, 380929, 335746, 318050, 253586, 250614, 242216, 17188, 163683, 154993, 136993, 136795, 5693, 1627
C23Olmen Obs. in Belgium, 1 in MPEC 2020-H229 -- 52768
F51Pan-STARRS 1 (PS1) in Hawaii, 39 in MPECs 2020-H222, 2020-H223, 2020-H225, 2020-H226, 2020-H227, 2020-H228, 2020-H229, 2020-H232, 2020-H233 & 2020-H234 -- 2020 HY, 2020 HU2, 2020 HT8, 2020 HS8, 2020 HS6, 2020 HR8, 2020 HQ8, 2020 HO8, 2020 HN8, 2020 HM6, 2020 HM2, 2020 HE6, 2020 HD6, 2020 HA9, 2020 GN3, 2017 OS18, 2017 GT6, 2015 SY2, 2015 HB10, 2009 HU77, 2006 GV2, 1998 MR24, 1998 HN3, 515446, 390929, 385268, 36183, 350536, 285110, 275976, 275714, 219527, 21277, 189973, 163679, 16064, 159686, 142781, 141053
F52Pan-STARRS 2 (PS2) in Hawaii, 12 in MPECs 2020-H228 & 2020-H229 -- 2020 HV1, 2020 HT8, 2020 HQ1, 2020 HL7, 2020 FO2, 2020 FA3, 2012 EM8, 65674, 436324, 402267, 276274, 139289
B49Paus Obs. in Spain, 1 in MPEC 2020-H229 -- 2020 HT7
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 2 in MPEC 2020-H229 -- 2020 HT7, 2020 HT3
D29Purple Mtn. Obs. Xuyi Station in China, 18 in MPEC 2020-H229 -- 2020 HY, 2015 VU142, 2015 TA145, 2010 EC135, 2002 XQ40, 520585, 482566, 380929, 36183, 349063, 330659, 248926, 169675, 154993, 11311, 5693, 1864, 1627
L18QOS Obs., 1 in MPEC 2020-H229 -- 539940
C95SATINO-1 in France, 1 in MPEC 2020-H229 -- 2020 BW10
033Schwarzschild Obs. in Germany, 5 in MPECs 2020-H223, 2020-H225, 2020-H226, 2020-H228 & 2020-H229 -- 2020 HT8, 2020 HR8, 2020 HQ8, 2020 HO8, 2020 HA8
Y00SONEAR in Brazil, 1 in MPEC 2020-H229 -- 539940
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2020-H223 -- 2020 HO8
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2020-H223, 2020-H224, 2020-H225, 2020-H226, 2020-H227, 2020-H229, 2020-H231, 2020-H232 & 2020-H233 -- 2020 HZ4, 2020 HY8, 2020 HY6, 2020 HU2, 2020 HT7, 2020 HS8, 2020 HR8, 2020 HR7, 2020 HQ8, 2020 HQ7, 2020 HQ6, 2020 HQ4, 2020 HQ3, 2020 HP8, 2020 HP5, 2020 HO8, 2020 HO7, 2020 HN7, 2020 HM7, 2020 HE7, 2017 GT6, 2015 UK52, 2014 XG8, 2010 JK33, 2006 GV2
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-H229 -- 2019 LL6
L01Visnjan Obs. in Croatia, 5 in MPECs 2020-H223, 2020-H224, 2020-H225, 2020-H228 & 2020-H231 -- 2020 HY8, 2020 HT8, 2020 HQ8, 2020 HP8, 2020 HO8
I41Zwicky Transient Facility (ZTF) in southern California, 11 in MPEC 2020-H229 -- 2020 HT7, 2020 HT3, 2015 FT118, 68350, 53110, 498066, 433992, 418265, 318050, 276732, 20255
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 HY8JPL Sentry20002056-207328.9337e-08-5.67-5.700JPL: Computed at 12:58 today Pacific time based on 27 observations spanning 2.1958 days (2020-Apr-27.38722 to 2020-Apr-29.583027). Diameter approximately 0.095 km. from weighted mean H=22.77.
2020 HW7NEODyS17002044-211751.93e-07-7.64-7.70NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2020-04-26.366 to 2020-04-28.488."
2020 HM7NEODyS1700208811.51e-08-8.40-8.40NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2020-04-25.559 to 2020-04-29.251."
2020 HE7JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1457 UTC today
NEODyS17002086-211133.12e-09-10.79-10.950NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2020-04-26.330 to 2020-04-29.190."
2020 HQ6JPL Sentry1700R E M O V E DJPL: Risk listing removed at 1428 UTC today
2020 HM6JPL Sentry17002090-209014.350e-09-9.17-9.170JPL: Computed at 08:08 today Pacific time based on 45 observations spanning 4.1083 days (2020-Apr-24.35008 to 2020-Apr-28.458346). Diameter approximately 0.016 km. from weighted mean H=26.60.
NEODyS17002083-209031.8e-08-8.52-8.620NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2020-04-24.351 to 2020-04-28.459."
2020 HQ4JPL Sentry17002052-2119390.0001385846158-5.00-5.370JPL: Computed at 07:43 today Pacific time based on 85 observations spanning 7.0881 days (2020-Apr-22.14953 to 2020-Apr-29.2376). Diameter approximately 0.015 km. from weighted mean H=26.82.
NEODyS17002051-21181621.59e-04-4.96-5.340NEODyS: "Based on 88 optical observations (of which 1 are rejected as outliers) from 2020-04-22.150 to 2020-04-29.238."
2020 HJ4NEODyS1700R E M O V E D-
JPL Sentry18002063-206315.147e-10-6.84-6.840JPL #2 for the day: Computed at 10:28 today Pacific time based on 33 observations spanning 12.952 days (2020-Apr-16.351354 to 2020-Apr-29.30299). Diameter approximately 0.320 km. from weighted mean H=20.12.
2020 HK3NEODyS1700207311.12e-08-7.29-7.290NEODyS: "Based on 76 optical observations (of which 0 are rejected as outliers) from 2020-04-19.547 to 2020-04-28.511."

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 29 April '20

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

2300Grabbed MPEC 2020-H234 - 2020 HA9 - see above
2000Noted that JPL Sentry has posted 2020 HY8 as an impact risk - see above
Grabbed MPEC 2020-H232 - 2006 GV2 - see above
Grabbed MPEC 2020-H233 - 2017 GT6 - see above
1900Grabbed MPEC 2020-H231 - 2020 HY8 - see above
1800Noted that JPL Sentry has updated its 2020 HJ4 risk assessment - see above
1700Noted that JPL Sentry has removed 2020 HE7 as an impact risk - see above
Noted that NEODyS has updated its 2020 HE7 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HJ4 risk assessment - see above
Noted that NEODyS has removed 2020 HJ4 as an impact risk - see above
Noted that NEODyS has updated its 2020 HK3 risk assessment - see above
Noted that JPL Sentry has reposted 2020 HM6 as an impact risk - see above
Noted that NEODyS has updated its 2020 HM6 risk assessment - see above
Noted that NEODyS has updated its 2020 HM7 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 removed 2020 HQ6 as an impact risk - see above
Noted that NEODyS has posted 2020 HW7 as an impact risk - see above
Grabbed MPEC 2020-H223 - 2020 HO8 - see above
Grabbed MPEC 2020-H224 - 2020 HP8 - see above
Grabbed MPEC 2020-H225 - 2020 HQ8 - see above
Grabbed MPEC 2020-H226 - 2020 HR8 - see above
Grabbed MPEC 2020-H227 - 2020 HS8 - see above
Grabbed MPEC 2020-H228 - 2020 HT8 - see above
Grabbed MPEC 2020-H229 - Daily Orbit Update - see above
Grabbed MPEC 2020-H230 - 2020 HV8 - see above
0441Grabbed MPEC 2020-H222 - 2020 HN8 - see above