Contents  on 21 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 21 April '20

The MPC's NEO Confirmation Page has 137 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 137 objects listed. Of these, 77 were "one nighters." The Tracking News counted a total of 161 listings on the NEOCP on this day.

New MPECs  on 21 April '20

Minor Planet Electronic Circulars

There were sixteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2020-H78 - "22:07 UT" - Reports of Suspected Cometary Activity


<< DOU on 21 April '20 >>  MPEC 2020-H77 - "12:05 UT" - Daily Orbit Update


MPEC 2020-H76 - "11:55 UT" - 2020 HJ2


MPEC 2020-H75 - "11:54 UT" - 2020 HH2


MPEC 2020-H74 - "11:52 UT" - 2020 HG2


MPEC 2020-H73 - "11:50 UT" - 2020 HF2


MPEC 2020-H72 - "11:46 UT" - 2005 VY3


MPEC 2020-H71 - "10:50 UT" - 2020 HE2


MPEC 2020-H70 - "10:40 UT" - 2020 HD2


MPEC 2020-H69 - "10:38 UT" - 2020 HC2


MPEC 2020-H68 - "10:36 UT" - 2020 HB2


<< OOC on 21 April '20 -- MPEC 2020-H67 - "06:11 UT" - Observations and Orbits of Comets and A/ Objects


MPEC 2020-H66 - "00:47 UT" - 2020 HY1


MPEC 2020-H65 - "00:46 UT" - 2020 HX1


MPEC 2020-H64 - "00:44 UT" - 2020 HW1


MPEC 2020-H63 - "00:39 UT" - 2019 AK54

Observers  on 21 April '20

A total of 123 observers appeared in this day's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-B
349Ageo Obs. in Japan, 6 in MPEC 2020-H67 -- C/2020 A2, C/2019 K7, C/2017 T2, 112P, 88P, 58P
M43Al Sadeem Obs. in Abu Dhabi, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2020-H67 -- 2020 F7
A50Andrushivka Obs. in Ukraine, 1 in MPEC 2020-H67 -- 124P
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2020-H64, 2020-H65, 2020-H66, 2020-H68, 2020-H70, 2020-H71, 2020-H73, 2020-H75 & 2020-H76 -- 2020 HY1, 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HH2, 2020 HF2, 2020 HE2, 2020 HD2, 2020 HB2
T05ATLAS Haleakala in Hawaii, 50 in MPECs 2020-H67 & 2020-H77 -- 2020 GF3, 2020 GD2, 2020 FB6, 2020 FA7, C/2020 B3, P/2019 Y2, 2019 XG1, C/2019 N1, 2019 K6, C/2019 F1, C/2019 C1, C/2017 K2, 2014 JO25, C/2014 B1, 2003 OC3, 68350, 52768, 524530, 494880, 436324, 433992, 425450, 40267, 388945, 373428, 35107, 34613, 318050, 276274, 237551, 184990, 18172, 115052, 8566, 7088, 6569, 6047, 5626, 1627, 278P, 257P, 249P, 246P, 124P, 117P, 88P, 87P, 78P, 28P, 10P
T08ATLAS Mauna Loa in Hawaii, 38 in MPECs 2020-H67 & 2020-H77 -- 2020 FM6, C/2020 F3, C/2020 F2, 2020 DM4, 2020 BO5, C/2020 B3, P/2019 Y2, C/2019 T4, 2019 O3, C/2019 F1, C/2019 C1, C/2017 Y2, C/2017 U7, 2017 ES2, 2014 JO25, C/2014 B1, 2006 FH36, 2001 GS2, 99935, 54401, 349063, 169675, 144411, 142555, 8014, 6050, 4954, 1685, 278P, 249P, 155P, 124P, 117P, 88P, 87P, 78P, 28P, 10P
I47Auger Obs. in Argentina, 1 in MPEC 2020-H67 -- C/2020 F8
069Baldone Obs. in Latvia, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
C86Blanes Obs. in Spain, 4 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2017 T2
Q68Blue Mountains Obs. in New South Wales, 7 in MPEC 2020-H67 -- C/2020 F3, C/2019 F1, C/2019 C1, C/2017 U7, C/2017 M4, 249P, 88P
G20Brignoles Obs., 7 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2017 T2, 246P, 124P, 88P
B96Brixiis Obs. in Belgium, 9 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2, 246P, 124P, 88P, 10P
K47BSCR Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
215Buchloe Obs. in Germany, 9 in MPEC 2020-H67 -- 2020 F7, C/2019 Y4-C, P/2019 Y2, 2018 V3, C/2017 T2, 278P, 246P, 155P, 78P
Z46Cardiff Obs., 6 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2
B20Carmelita Obs. in Spain, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
I72Carpe Noctem Obs. in Spain, 7 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A, C/2019 Y1, C/2019 N1, C/2018 N2, C/2017 T2
160Castelmartini Obs. in Italy, 8 in MPEC 2020-H67 -- P/2019 Y2, C/2019 K7, C/2018 U1, 246P, 155P, 124P, 114P, 78P
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2020-H67 & 2020-H77 -- 2020 HU1, 2020 GD2, P/2019 Y2, C/2019 K7, 68278, 66251, 52768, 413989, 40267, 388945, 35107, 184990, 137064, 7753, 278P, 249P, 246P, 124P, 88P, 87P, 10P
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 9 in MPECs 2020-H69, 2020-H70, 2020-H74, 2020-H75, 2020-H76 & 2020-H77 -- 2020 HJ2, 2020 HH2, 2020 HG2, 2020 HD2, 2020 HC2, 2020 GQ2, 2020 GO2, 2017 UC45, 2010 JV153
A77Chante-Perdrix Obs. in France, 8 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1, C/2017 T2, 249P, 210P, 88P
970Chelmsford Obs. in England, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-A
Z99Clixby Obs. in England, 3 in MPECs 2020-H67 & 2020-H77 -- 2020 HY, C/2019 Y4-A, C/2017 T2
178Collonges Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-B, 124P
L59Compustar Obs., 1 in MPEC 2020-H67 -- 2018 V3
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2020-H67 & 2020-H77 -- P/2020 G1, 52768
B50Corner Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2020-H67 -- C/2019 Y4-A
Z39Costa Teguise Obs. in the Canary Islands, 3 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A
I39Cruz del Sur Obs. in Argentina, 2 in MPEC 2020-H67 -- C/2020 F8, C/2020 F5
P66Deokheung Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-A
K87Dettelbach Vineyard Obs. in Germany, 12 in MPECs 2020-H67 & 2020-H77 -- 2020 HY, 2020 HM, 2020 GJ2, 2020 GF3, 2020 GD2, 2020 FW3, 2020 FO2, 2020 FB6, 2020 FA7, 2020 FA3, C/2019 Y4-C, C/2017 K2
K77EHB01 Obs., 6 in MPEC 2020-H67 -- C/2020 B3, 2019 K6, C/2017 K2, 249P, 210P, 91P
Z40El Manzanillo Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
734Farpoint Obs. in Kansas, 5 in MPECs 2020-H73, 2020-H75 & 2020-H77 -- 2020 HH2, 2020 HF2, 2020 FO2, 2017 FE90, 2015 FT118
W46Foxfire Village Obs., 5 in MPECs 2020-H67 & 2020-H77 -- 2017 FE90, 2001 GS2, 388838, 190166, 246P
G26Fushan Obs. in China, 1 in MPEC 2020-H67 -- C/2017 T2
372Geisei Obs. in Japan, 4 in MPEC 2020-H67 -- P/2020 G1, C/2020 F3, C/2019 Y4-C, C/2019 Y4-B
E89Geyserland Obs. in New Zealand, 2 in MPEC 2020-H67 -- C/2020 F3, C/2019 U6
E94Gisborne Obs. in New Zealand, 2 in MPEC 2020-H67 -- C/2020 F8, C/2020 F3
Z30Glyn Marsh Obs., 7 in MPECs 2020-H67 & 2020-H77 -- C/2019 Y4-D, C/2019 Y4-C, P/2019 Y2, C/2019 Y1, C/2017 T2, 52768, 124P
K73Gravina Obs. in Italy, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
J95Great Shefford Obs. in England, 3 in MPECs 2020-H67, 2020-H76 & 2020-H77 -- 2020 HM, 2020 HJ2, C/2019 Y4-B
134Groszschwabhausen Obs. in Germany, 1 in MPEC 2020-H67 -- C/2018 W2
A17Guidestar Obs. in Germany, 3 in MPECs 2020-H64 & 2020-H77 -- 2020 HW1, 2020 GY2, 2009 WZ7
Q56Heaven's Mirror Obs., 1 in MPEC 2020-H67 -- C/2020 F8
N502program code 2 via Himalayan Chandra Telescope, 1 in MPEC 2020-H67 -- C/2020 F2
P87Hirao Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-B, 88P, 87P
D88Hiratsuka Obs. in Japan, 8 in MPEC 2020-H67 -- P/2019 Y2, C/2019 F1, C/2019 C1, 246P, 124P, 117P, 88P, 87P
750Hobbs Obs. in Wisconsin, 2 in MPEC 2020-H67 -- C/2017 T2, 124P
H06iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-A
H06>program code ">" (39) via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-H67 -- C/2019 Y4-C
Q62iTelescope Obs. Siding Spring in New South Wales, 4 in MPECs 2020-H67 & 2020-H77 -- 2020 FC5, C/2020 F8, C/2020 F3, C/2019 U6
Q62'program code "'" (16) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H67 -- C/2020 F2
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 13 in MPEC 2020-H67 -- C/2020 F3, P/2019 Y2, C/2019 U6, 2019 K6, C/2018 W2, 2018 V3, C/2018 A6, C/2016 X1, 296P, 115P, 91P, 58P, 2I
G19Kant Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
K85Kelmis Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-A, C/2018 W2, 260P
585Kiev Comet Station in Ukraine, 1 in MPEC 2020-H67 -- C/2019 Y4-C
1861program code 1 via Kitab Obs., 3 in MPECs 2020-H67 & 2020-H77 -- 2020 GD2, 2020 FM6, 88P
246KLENOT in the Czech Republic, 9 in MPECs 2020-H66, 2020-H67, 2020-H68, 2020-H71, 2020-H74 & 2020-H77 -- 2020 HY1, 2020 HG2, 2020 HE2, 2020 HB2, 2020 GD2, C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, 246P
L12Koksijde Obs., 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2017 T2
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H77 -- 52768
D95Kurihara Obs. in Japan, 5 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 C1, 155P, 87P
V37LCO McDonald Obs. in Texas, 1 in MPEC 2020-H77 -- 388945
Q63LCO Siding Spring A in New South Wales, 1 in MPEC 2020-H67 -- C/2020 F8
C10Maisoncelles Obs. in France, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
232Masquefa Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-B
Z22MASTER IAC Obs. in the Canary Islands, 2 in MPEC 2020-H77 -- 86667, 66251
G07Millau Obs., 1 in MPEC 2020-H67 -- C/2017 T2
118Modra Obs. in Slovakia, 2 in MPEC 2020-H67 -- C/2010 U3, 278P
213Montcabre Obs. in Spain, 3 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A, C/2019 Y1
108Montelupo Obs. in Italy, 1 in MPEC 2020-H67 -- P/2020 G1
B06Montseny Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-A
V01Mountainville Obs. in Utah, 1 in MPEC 2020-H77 -- 2020 HM
G96Mt. Lemmon Survey (MLS) in Arizona, 34 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H67, 2020-H71, 2020-H74, 2020-H75, 2020-H76 & 2020-H77 -- 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HH2, 2020 HG2, 2020 HE2, C/2020 F6, C/2020 F2, C/2020 B3, P/2019 Y2, 2019 K6, C/2019 F1, 2019 AK54, 2015 OL35, 477524, 416231, 40267, 276732, 248926, 163692, 144861, 136993, 5693, 4257, 1627, 392P, 377P, 376P, 278P, 266P, 203P, 91P, 88P, 87P
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2020-H77 -- 2005 UO157
C47Nonndorf Obs. in Austria, 4 in MPECs 2020-H67 & 2020-H77 -- 2020 GD2, C/2019 N1, C/2018 U1, 52768
J69North Obs. in England, 1 in MPEC 2020-H67 -- C/2019 Y4-A
Z80Northolt Branch Obs. in England, 8 in MPECs 2020-H67 & 2020-H77 -- 2020 GJ2, C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, 539940, 413989, 373428, 137064
G34Oberfrauendorf Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B
C23Olmen Obs. in Belgium, 15 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A, P/2019 Y2, C/2019 N1, C/2019 F1, C/2017 T2, C/2017 K2, C/2014 B1, C/2010 U3, 278P, 155P, 117P, 88P, 31P
F51Pan-STARRS 1 (PS1) in Hawaii, 74 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H66, 2020-H67, 2020-H68, 2020-H69, 2020-H71, 2020-H72, 2020-H73, 2020-H75 & 2020-H77 -- 2020 HY1, 2020 HY, 2020 HX1, 2020 HW1, 2020 HU1, 2020 HU, 2020 HJ1, 2020 HH2, 2020 HF2, 2020 HE2, 2020 HC2, 2020 HB2, 2020 GV2, 2020 GS, 2020 GC3, 2020 GB2, 2020 FS1, 2020 F7, P/2020 F1, 2020 DB5, 2020 CJ1, C/2020 B2, P/2019 Y2, 2019 XL1, 2019 GO3, 2019 AK54, 2018 V3, 2016 OY2, 2014 WD201, 2013 ON5, 2012 QE50, 2012 JS17, 2012 EA2, 2011 JR13, 2006 PY17, 2005 VY3, 2003 JN14, 2000 LK, 88264, 53409, 519354, 513125, 510262, 471240, 455591, 450185, 39796, 31345, 308899, 27031, 26760, 190166, 18109, 175729, 162422, 154589, 152941, 138524, 136923, 136618, 7358, 1917, 377P, 284P, 278P, 249P, 240P, 231P, 228P, 155P, 124P, 117P, 87P, 31P
F52Pan-STARRS 2 (PS2) in Hawaii, 22 in MPECs 2020-H63, 2020-H67, 2020-H68, 2020-H70, 2020-H72 & 2020-H77 -- 2020 HD2, 2020 HB2, 2020 GA3, 2020 FF6, 2020 BR16, C/2020 B3, 2019 XG1, 2019 JD7, 2019 AK54, C/2017 K2, 2016 FT14, C/2014 B1, 2007 HX82, 2005 VY3, 99935, 36183, 185702, 169675, 142781, 141670, 6050, 87P
K19PASTIS Obs. in France, 1 in MPEC 2020-H67 -- C/2019 Y4-A
323Perth Obs. in Western Australia, 3 in MPEC 2020-H67 -- C/2020 F3, C/2019 U6, 88P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPECs 2020-H67 & 2020-H77 -- C/2019 Y4-C, 2015 TX143
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2020-H71 -- 2020 HE2
D29Purple Mtn. Obs. Xuyi Station in China, 7 in MPEC 2020-H67 -- C/2019 F1, 246P, 155P, 124P, 88P, 78P, 10P
L04ROASTERR-1 in Romania, 2 in MPEC 2020-H67 -- C/2017 T2, 87P
V83Rolling Hills Obs. in Missouri, 1 in MPEC 2020-H77 -- 2014 JO25
X03SADR Obs., 7 in MPEC 2020-H67 -- C/2020 F8, C/2020 F5, C/2020 B3, C/2019 B3, 91P, 28P, 10P
233San Vito Obs. in Italy, 3 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
H36Sandlot Obs. in Kansas, 1 in MPEC 2020-H69 -- 2020 HC2
B56Sant Pere Obs. in Spain, 3 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B
C95SATINO-1 in France, 1 in MPEC 2020-H77 -- 2020 BO1
204Schiaparelli Obs. in Italy, 2 in MPEC 2020-H67 -- C/2019 Y4-B, C/2019 Y4-A
K24Schmelz Obs. in Germany, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-B
033Schwarzschild Obs. in Germany, 7 in MPECs 2020-H64, 2020-H65, 2020-H66, 2020-H71, 2020-H73, 2020-H74 & 2020-H76 -- 2020 HY1, 2020 HX1, 2020 HW1, 2020 HJ2, 2020 HG2, 2020 HF2, 2020 HE2
K14Sencelles Obs. in Spain, 4 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-B, C/2019 Y4-A
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C
W88#program code "#" (12) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
W88%program code "%" (14) via Slooh.com Chile Obs. in Chile, 2 in MPEC 2020-H67 -- C/2020 F8, C/2019 U6
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
W885M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H67 -- C/2020 F8
Y00SONEAR in Brazil, 2 in MPEC 2020-H77 -- 20826, 137064
L39Spica Obs., 1 in MPEC 2020-H67 -- C/2019 Y4-C
K21St. Saturnin les Avignon Obs. in France, 1 in MPEC 2020-H67 -- C/2019 Y4-A
C36Starry Wanderer Obs. in Belarus, 2 in MPEC 2020-H67 -- C/2019 Y4-D, C/2018 N2
I52Steward Obs. Mt. Lemmon Station in Arizona, 25 in MPECs 2020-H63, 2020-H64, 2020-H65, 2020-H66, 2020-H68, 2020-H69, 2020-H71, 2020-H73, 2020-H74, 2020-H76 & 2020-H77 -- 2020 HY1, 2020 HY, 2020 HX1, 2020 HW1, 2020 HS1, 2020 HM, 2020 HL, 2020 HJ2, 2020 HJ, 2020 HG2, 2020 HG, 2020 HF2, 2020 HE2, 2020 HD, 2020 HC2, 2020 HB2, 2020 HB1, 2020 GY2, 2020 GU2, 2020 GS2, 2020 GM2, 2020 GC3, 2020 FD3, 2019 AK54, 2016 EL84
Q38Swan Hill Obs., 5 in MPEC 2020-H67 -- C/2020 F8, C/2020 F3, C/2019 U6, C/2018 F4, 58P
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2020-H67 -- C/2020 F2
I81Tarbatness Obs. in Scotland, 11 in MPEC 2020-H67 -- C/2019 Y4-A, P/2019 Y2, C/2019 Y1, C/2019 N1, C/2018 U1, C/2018 N2, C/2017 T2, C/2017 K2, C/2010 U3, 246P, 155P
954Teide Obs. in the Canary Islands, 1 in MPEC 2020-H67 -- 2I
C35Terrassa Obs. in Spain, 1 in MPEC 2020-H67 -- C/2019 Y4-C
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-H77 -- 2019 YJ2, 2019 PE2
K41Vegaquattro Obs. in Italy, 2 in MPEC 2020-H67 -- 246P, 10P
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2020-H67 -- C/2019 F1, C/2018 U1, C/2017 K2
L01Visnjan Obs. in Croatia, 5 in MPECs 2020-H65, 2020-H66, 2020-H70, 2020-H73 & 2020-H74 -- 2020 HY1, 2020 HX1, 2020 HG2, 2020 HF2, 2020 HD2
G23Vulpecula Obs., 4 in MPEC 2020-H67 -- C/2019 Y4-D, C/2019 Y4-C, C/2019 Y4-A, C/2019 Y1
G56Walnut Creek Obs. in northern California, 2 in MPEC 2020-H77 -- 2020 FA7, 539940
Z92West Park Obs. in England, 2 in MPECs 2020-H67 & 2020-H77 -- C/2017 T2, 52768
G33Wickede Obs. in Germany, 1 in MPEC 2020-H77 -- 52768
C51WISE in Earth polar orbit, 3 in MPEC 2020-H77 -- 2017 BE32, 54071, 492143
Q78Woogaroo Obs., 1 in MPEC 2020-H67 -- 28P
367Yatsuka Obs. in Japan, 3 in MPEC 2020-H67 -- C/2019 N1, C/2017 T2, 88P
Z57Zuben Obs., 2 in MPEC 2020-H67 -- C/2019 Y4-C, C/2019 Y4-A
I41Zwicky Transient Facility in southern California, 1 in MPEC 2020-H67 -- 2020 F7
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 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 GA3NEODyS16012054-2118211.25e-06-5.95-6.430NEODyS: "Based on 33 optical observations (of which 1 are rejected as outliers) from 2020-04-15.411 to 2020-04-18.442."
JPL Sentry16002054-2119204.772271e-06-5.42-5.800JPL: Computed at 07:08 today Pacific time based on 33 observations spanning 3.0309 days (2020-Apr-15.41021 to 2020-Apr-18.44112). Diameter approximately 0.033 km. from weighted mean H=25.04.
2020 GY2NEODyS16012093-211851.27e-06-5.30-5.320NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2020-04-15.350 to 2020-04-21.439."
JPL Sentry16002093-211841.2481e-06-5.33-5.440JPL: Computed at 07:00 today Pacific time based on 51 observations spanning 6.0889 days (2020-Apr-15.34915 to 2020-Apr-21.43804). Diameter approximately 0.064 km. from weighted mean H=23.63.
2020 GV2NEODyS16012077-207821.38e-07-7.73-7.870NEODyS: "Based on 55 optical observations (of which 1 are rejected as outliers) from 2020-04-15.417 to 2020-04-20.453."
JPL Sentry16002077-207711.726e-07-7.62-7.620JPL: Computed at 07:00 today Pacific time based on 43 observations spanning 5.0359 days (2020-Apr-15.416676 to 2020-Apr-20.452591). Diameter approximately 0.014 km. from weighted mean H=26.84.
2015 HV182NEODyS1601R E M O V E D-
JPL Sentry0014R E M O V E DJPL: Risk listing removed at 0005 UTC today

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 21 April '20

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

2358Grabbed MPEC 2020-H78 - Reports of Suspected Cometary Activity - see above
1601Noted that NEODyS has removed 2015 HV182 as an impact risk - see above
Noted that NEODyS has updated its 2020 GA3 risk assessment - see above
Noted that NEODyS has updated its 2020 GV2 risk assessment - see above
Noted that NEODyS has updated its 2020 GY2 risk assessment - see above
1600Noted that JPL Sentry has updated its 2020 GA3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GV2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GY2 risk assessment - see above
Grabbed MPEC 2020-H67 - Observations and Orbits of Comets and A/ Objects - see above
Grabbed MPEC 2020-H68 - 2020 HB2 - see above
Grabbed MPEC 2020-H69 - 2020 HC2 - see above
Grabbed MPEC 2020-H70 - 2020 HD2 - see above
Grabbed MPEC 2020-H71 - 2020 HE2 - see above
Grabbed MPEC 2020-H72 - 2005 VY3 - see above
Grabbed MPEC 2020-H73 - 2020 HF2 - see above
Grabbed MPEC 2020-H74 - 2020 HG2 - see above
Grabbed MPEC 2020-H75 - 2020 HH2 - see above
Grabbed MPEC 2020-H76 - 2020 HJ2 - see above
Grabbed MPEC 2020-H77 - Daily Orbit Update - see above
0510Grabbed MPEC 2020-H63 - 2019 AK54 - see above
Grabbed MPEC 2020-H64 - 2020 HW1 - see above
Grabbed MPEC 2020-H65 - 2020 HX1 - see above
Grabbed MPEC 2020-H66 - 2020 HY1 - see above
0014Noted that JPL Sentry has removed 2015 HV182 as an impact risk - see above