Contents  on 20 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 20 April '20

The MPC's NEO Confirmation Page has 107 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 107 objects listed. Of these, 64 were "one nighters." So far The Tracking News has counted a total of 135 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 20 April '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-H62 - "23:09 UT" - 2020 HV1


MPEC 2020-H61 - "22:50 UT" - 2020 HU1


MPEC 2020-H60 - "22:42 UT" - 2015 HV182


MPEC 2020-H59 - "14:39 UT" - 2020 HT1


MPEC 2020-H58 - "14:33 UT" - 2020 HS1


MPEC 2020-H57 - "14:31 UT" - 2020 HR1


MPEC 2020-H56 - "14:09 UT" - 2020 HQ1


<< DOU on 20 April '20 >>  MPEC 2020-H55 - "12:03 UT" - Daily Orbit Update


MPEC 2020-H54 - "11:45 UT" - 2020 HP1


MPEC 2020-H53 - "11:40 UT" - 2012 HJ8


MPEC 2020-H52 - "07:55 UT" - 2020 HO1


MPEC 2020-H51 - "07:52 UT" - 2020 HN1


MPEC 2020-H50 - "07:50 UT" - 2020 HM1


MPEC 2020-H49 - "07:49 UT" - 2020 HL1


MPEC 2020-H48 - "07:47 UT" - 2020 HK1


MPEC 2020-H47 - "06:13 UT" - 2020 HJ1


MPEC 2020-H46 - "06:13 UT" - 2020 HH1


MPEC 2020-H45 - "06:11 UT" - 2020 HG1


MPEC 2020-H44 - "06:10 UT" - 2020 HF1


MPEC 2020-H43 - "06:08 UT" - 2020 HE1


MPEC 2020-H42 - "06:08 UT" - 2020 HD1


MPEC 2020-H41 - "01:36 UT" - 2020 HC1

Observers  on 20 April '20

A total of 37 observers appear in today's MPECs.

CodeObserver / observatory
R57Aorangi Iti Obs. in New Zealand, 5 in MPECs 2020-H55, 2020-H59 & 2020-H61 -- 2020 HU1, 2020 HT1, 2020 FX5, 2020 BP14, 2017 ES2
E23Arcadia Obs. in New South Wales, 1 in MPEC 2020-H44 -- 2020 HF1
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2020-H42, 2020-H43, 2020-H45, 2020-H50, 2020-H52, 2020-H53, 2020-H54, 2020-H56, 2020-H57, 2020-H61 & 2020-H62 -- 2020 HV1, 2020 HU1, 2020 HR1, 2020 HQ1, 2020 HP1, 2020 HO1, 2020 HM1, 2020 HG1, 2020 HE1, 2020 HD1, 2012 HJ8
T05ATLAS Haleakala in Hawaii, 25 in MPEC 2020-H55 -- 2004 FF29, 90367, 90075, 86667, 85628, 68278, 66251, 54789, 388838, 36284, 36183, 349928, 218863, 210012, 192563, 190166, 175189, 163243, 145656, 138847, 137064, 136618, 115052, 11066, 4055
T08ATLAS Mauna Loa in Hawaii, 10 in MPECs 2020-H44 & 2020-H55 -- 2020 HF1, 2015 TX143, 2010 XD11, 90367, 500094, 413989, 35107, 237551, 141525, 1866
X74Campo dos Amarais Obs., 1 in MPEC 2020-H55 -- 85184
703Catalina Sky Survey (CSS) in Arizona, 20 in MPECs 2020-H55 & 2020-H61 -- 2020 HU1, 2020 GJ2, 2020 GF3, 2020 GD2, 2020 FO2, 2020 FB6, 2020 FA7, 68350, 539940, 524530, 436324, 388945, 373428, 318050, 276274, 252793, 192563, 141525, 7088, 4581
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 8 in MPECs 2020-H41, 2020-H45, 2020-H46, 2020-H47, 2020-H50, 2020-H51, 2020-H57 & 2020-H62 -- 2020 HV1, 2020 HR1, 2020 HN1, 2020 HM1, 2020 HJ1, 2020 HH1, 2020 HG1, 2020 HC1
Z99Clixby Obs. in England, 5 in MPECs 2020-H55 & 2020-H61 -- 2020 HU1, 2020 HM, 2020 GJ2, 2020 GD2, 2020 FA7
W84&program code "&" (15) via DECam in Chile, 1 in MPEC 2020-H55 -- 2017 BR93
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2020-H61 -- 2020 HU1
734Farpoint Obs. in Kansas, 2 in MPECs 2020-H52 & 2020-H61 -- 2020 HU1, 2020 HO1
X31Galilei Obs., 1 in MPEC 2020-H44 -- 2020 HF1
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-H44 -- 2020 HF1
J95Great Shefford Obs. in England, 4 in MPECs 2020-H43, 2020-H52, 2020-H55 & 2020-H61 -- 2020 HU1, 2020 HO1, 2020 HE1, 2020 GZ2
A17Guidestar Obs. in Germany, 8 in MPECs 2020-H55 & 2020-H61 -- 2020 HU1, 2020 HM, 2020 GJ2, 2020 GF3, 2020 GD2, 2020 FB6, 2020 FA7, 2009 FY29
1861program code 1 via Kitab Obs., 3 in MPEC 2020-H55 -- 2020 GD2, 2020 FM6, 2020 FA7
246KLENOT in the Czech Republic, 2 in MPECs 2020-H61 & 2020-H62 -- 2020 HV1, 2020 HU1
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H55 -- 52768
V01Mountainville Obs. in Utah, 2 in MPECs 2020-H55 & 2020-H61 -- 2020 HY, 2020 HU1
G96Mt. Lemmon Survey (MLS) in Arizona, 39 in MPECs 2020-H41, 2020-H42, 2020-H43, 2020-H45, 2020-H46, 2020-H47, 2020-H49, 2020-H51, 2020-H52, 2020-H53, 2020-H54, 2020-H55, 2020-H56, 2020-H57 & 2020-H62 -- 2020 HV1, 2020 HR1, 2020 HQ1, 2020 HP1, 2020 HO1, 2020 HN1, 2020 HL1, 2020 HJ1, 2020 HH1, 2020 HH, 2020 HG1, 2020 HE1, 2020 HD1, 2020 HC1, 2020 GR2, 2020 GJ2, 2020 GF3, 2020 GA1, 2020 FB6, 2020 BY12, 2019 XG, 2013 GY7, 2012 HJ8, 2009 FY29, 54789, 524530, 523670, 516154, 510073, 465892, 436324, 432509, 413216, 380929, 335746, 318050, 27031, 250614, 163683
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2020-H55 -- 2017 JK2
F51Pan-STARRS 1 (PS1) in Hawaii, 43 in MPECs 2020-H41, 2020-H42, 2020-H47, 2020-H48, 2020-H50, 2020-H53, 2020-H55, 2020-H58, 2020-H59 & 2020-H60 -- 2020 HU, 2020 HT1, 2020 HS1, 2020 HR, 2020 HN, 2020 HM1, 2020 HK1, 2020 HJ1, 2020 HE, 2020 HD1, 2020 HC1, 2020 GV2, 2020 GS, 2020 FH6, 2018 NM4, 2018 BA7, 2016 JU24, 2015 HV182, 2012 QE50, 2012 HJ8, 2012 EA2, 2000 LK, 52760, 523670, 515446, 513125, 498066, 483471, 471240, 392704, 385268, 37655, 329669, 277142, 189263, 163679, 162157, 154589, 152941, 138524, 136618, 7753, 7358
F52Pan-STARRS 2 (PS2) in Hawaii, 33 in MPECs 2020-H42, 2020-H43, 2020-H45, 2020-H46, 2020-H55 & 2020-H59 -- 2020 HT1, 2020 HH1, 2020 HG1, 2020 HE1, 2020 HD1, 2016 OY2, 2015 TA145, 2015 OL35, 2014 UA192, 2011 AM24, 2006 GX2, 2003 UG22, 2002 SQ, 1998 HN3, 85628, 520585, 513125, 416231, 415267, 412976, 34613, 343158, 276732, 275714, 21277, 175189, 15745, 154715, 153267, 141495, 6047, 1864, 1627
V93Pin Oak Obs., 3 in MPEC 2020-H55 -- 52768, 388945, 138847
D29Purple Mtn. Obs. Xuyi Station in China, 8 in MPEC 2020-H55 -- 2020 GF3, 2020 FB6, 2015 FT118, 2000 WO148, 154229, 137064, 1866, 1627
L40Saarbruecken Rastpfuhl Obs., 2 in MPEC 2020-H55 -- 2020 GD2, 52768
H36Sandlot Obs. in Kansas, 2 in MPECs 2020-H52 & 2020-H61 -- 2020 HU1, 2020 HO1
C95SATINO-1 in France, 1 in MPEC 2020-H55 -- 2020 BV
033Schwarzschild Obs. in Germany, 13 in MPECs 2020-H41, 2020-H43, 2020-H48, 2020-H52, 2020-H53, 2020-H54, 2020-H55, 2020-H56, 2020-H57, 2020-H58, 2020-H59 & 2020-H62 -- 2020 HV1, 2020 HT1, 2020 HS1, 2020 HR1, 2020 HQ1, 2020 HP1, 2020 HO1, 2020 HK1, 2020 HE1, 2020 HC1, 2020 FR1, 2020 FM6, 2012 HJ8
W88#program code "#" (12) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H55 -- 2020 DM4
W88(program code "(" (17) via Slooh.com Chile Obs. in Chile, 5 in MPEC 2020-H55 -- 2020 GA2, 2020 FM6, 2019 WB6, 2019 MA2, 325395
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-H55 -- 7088
I52Steward Obs. Mt. Lemmon Station in Arizona, 13 in MPECs 2020-H41, 2020-H43, 2020-H45, 2020-H46, 2020-H48, 2020-H49, 2020-H52, 2020-H53, 2020-H54, 2020-H56, 2020-H57, 2020-H61 & 2020-H62 -- 2020 HV1, 2020 HU1, 2020 HR1, 2020 HQ1, 2020 HP1, 2020 HO1, 2020 HL1, 2020 HK1, 2020 HH1, 2020 HG1, 2020 HE1, 2020 HC1, 2012 HJ8
A16Tentlingen Obs. in Switzerland, 4 in MPEC 2020-H55 -- 2019 XG1, 388838, 373428, 137064
L01Visnjan Obs. in Croatia, 6 in MPECs 2020-H46, 2020-H48, 2020-H54, 2020-H56, 2020-H57 & 2020-H58 -- 2020 HS1, 2020 HR1, 2020 HQ1, 2020 HP1, 2020 HK1, 2020 HH1
Z92West Park Obs. in England, 1 in MPEC 2020-H55 -- 52768
Q78Woogaroo Obs., 2 in MPEC 2020-H55 -- 2020 GA2, 2020 FM6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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 HM1JPL Sentry16402038-211681.29575e-08-6.27-6.530JPL: Computed at 01:57 today Pacific time based on 14 observations spanning 2.9270 days (2020-Apr-16.40587 to 2020-Apr-19.33287). Diameter approximately 0.200 km. from weighted mean H=21.15.
NEODyS16402038-210624.56e-10-7.88-8.070NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2020-04-16.407 to 2020-04-19.334."
2020 HL1JPL Sentry16402059-206624.806e-06-5.43-5.530JPL: Computed at 01:57 today Pacific time based on 17 observations spanning 3.0776 days (2020-Apr-16.27939 to 2020-Apr-19.35701). Diameter approximately 0.030 km. from weighted mean H=25.26.
NEODyS16402055-206631.14e-05-5.03-5.180NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2020-04-16.280 to 2020-04-19.358."
2020 HNJPL Sentry16402055-2116303.04313779e-05-6.35-6.590JPL: Computed at 07:50 today Pacific time based on 25 observations spanning 3.1743 days (2020-Apr-16.27939 to 2020-Apr-19.453672). Diameter approximately 0.007 km. from weighted mean H=28.55.
NEODyS16402055-2118552.48e-05-6.52-6.920NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2020-04-16.280 to 2020-04-19.454."
2020 HEJPL Sentry16402056-205614.535e-09-7.01-7.010JPL: Computed at 07:32 today Pacific time based on 38 observations spanning 4.0808 days (2020-Apr-16.25333 to 2020-Apr-20.334094). Diameter approximately 0.060 km. from weighted mean H=23.76.
NEODyS1640205612.35e-09-7.30-7.30NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2020-04-16.254 to 2020-04-20.335."
2020 GZ2JPL Sentry16402049-205440.0002114416-4.99-5.000JPL: Computed at 07:42 today Pacific time based on 35 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.
NEODyS16402049-205961.37e-04-5.19-5.190NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2020-04-15.392 to 2020-04-19.972."
2020 GV2JPL Sentry16402077-207714.324e-07-7.23-7.230JPL: Computed at 07:29 today Pacific time based on 39 observations spanning 4.0434 days (2020-Apr-15.416676 to 2020-Apr-19.46006). Diameter approximately 0.014 km. from weighted mean H=26.86.
NEODyS16402077-207823.1e-07-7.39-7.430NEODyS: "Based on 51 optical observations (of which 1 are rejected as outliers) from 2020-04-15.417 to 2020-04-19.461."

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 20 April '20

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

2358Grabbed MPEC 2020-H60 - 2015 HV182 - see above
Grabbed MPEC 2020-H61 - 2020 HU1 - see above
Grabbed MPEC 2020-H62 - 2020 HV1 - see above
1640Noted that JPL Sentry has updated its 2020 GV2 risk assessment - see above
Noted that NEODyS has updated its 2020 GV2 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 HE as an impact risk - see above
Noted that NEODyS has updated its 2020 HE risk assessment - see above
Noted that JPL Sentry has posted 2020 HL1 as an impact risk - see above
Noted that NEODyS has posted 2020 HL1 as an impact risk - see above
Noted that JPL Sentry has posted 2020 HM1 as an impact risk - see above
Noted that NEODyS has posted 2020 HM1 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 HN risk assessment - see above
Noted that NEODyS has updated its 2020 HN risk assessment - see above
Grabbed MPEC 2020-H42 - 2020 HD1 - see above
Grabbed MPEC 2020-H43 - 2020 HE1 - see above
Grabbed MPEC 2020-H44 - 2020 HF1 - see above
Grabbed MPEC 2020-H45 - 2020 HG1 - see above
Grabbed MPEC 2020-H46 - 2020 HH1 - see above
Grabbed MPEC 2020-H47 - 2020 HJ1 - see above
Grabbed MPEC 2020-H48 - 2020 HK1 - see above
Grabbed MPEC 2020-H49 - 2020 HL1 - see above
Grabbed MPEC 2020-H50 - 2020 HM1 - see above
Grabbed MPEC 2020-H51 - 2020 HN1 - see above
Grabbed MPEC 2020-H52 - 2020 HO1 - see above
Grabbed MPEC 2020-H53 - 2012 HJ8 - see above
Grabbed MPEC 2020-H54 - 2020 HP1 - see above
Grabbed MPEC 2020-H55 - Daily Orbit Update - see above
Grabbed MPEC 2020-H56 - 2020 HQ1 - see above
Grabbed MPEC 2020-H57 - 2020 HR1 - see above
Grabbed MPEC 2020-H58 - 2020 HS1 - see above
Grabbed MPEC 2020-H59 - 2020 HT1 - see above
0450Grabbed MPEC 2020-H41 - 2020 HC1 - see above