Contents  on 17 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.

Radar Astrometry  on 17 April '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1600 UTC when the database was dated 17 April



Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity  on 17 April '20

The MPC's NEO Confirmation Page has 59 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 59 objects listed. Of these, 36 were "one nighters." So far The Tracking News has counted a total of 72 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 17 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-H13 - "12:33 UT" - 2020 GF3


<< DOU on 17 April '20 >>  MPEC 2020-H12 - "12:05 UT" - Daily Orbit Update


MPEC 2020-H11 - "11:30 UT" - 2020 GE3


MPEC 2020-H10 - "10:15 UT" - 2020 GD3


MPEC 2020-H09 - "10:14 UT" - 2020 GC3


MPEC 2020-H08 - "10:10 UT" - 2020 GB3


MPEC 2020-H07 - "06:59 UT" - 2020 GA3


MPEC 2020-H06 - "04:22 UT" - Comet P/2020 G1 (Pimentel)


MPEC 2020-H05 - "01:26 UT" - 2020 GZ2

Observers  on 17 April '20

A total of 73 observers appear in today's MPECs.

CodeObserver / observatory
L2729PREMOTE Obs., 1 in MPEC 2020-H06 -- P/2020 G1
251Arecibo in Puerto Rico, 1 in radar -- 52768
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2020-H07, 2020-H08, 2020-H09, 2020-H11 & 2020-H12 -- 2020 GU, 2020 GT1, 2020 GP, 2020 GE3, 2020 GC3, 2020 GB3, 2020 GA3, 2020 FJ1, 2020 FF6, 2020 CJ1, 2020 BS12, 2020 BH11, 2019 TF2, 2014 VN6, 2009 VZ, 162157
T08ATLAS Mauna Loa in Hawaii, 17 in MPEC 2020-H12 -- 2020 GA2, 2020 FV6, 2020 BO5, 2017 FE90, 2017 ES2, 2011 GM44, 2006 FH36, 2001 GS2, 99935, 54401, 315098, 19764, 169675, 144411, 142555, 6050, 4954
C77Bernezzo Obs. in Italy, 1 in MPEC 2020-H06 -- P/2020 G1
L54Berthelot Obs., 3 in MPEC 2020-H12 -- 539940, 413989, 137064
Q80Birkdale Obs. in Queensland, 1 in MPEC 2020-H06 -- P/2020 G1
X74Campo dos Amarais Obs., 1 in MPEC 2020-H06 -- P/2020 G1
160Castelmartini Obs. in Italy, 21 in MPECs 2020-H06 & 2020-H12 -- 2020 GT2, 2020 GJ2, 2020 GD2, P/2020 G1, 2020 FA7, 2019 XG1, 2011 FZ2, 85628, 85275, 68350, 436324, 388945, 373428, 318050, 267494, 192563, 190166, 137170, 137064, 136618, 115052
703Catalina Sky Survey (CSS) in Arizona, 44 in MPECs 2020-H12 & 2020-H13 -- 2020 GJ2, 2020 GF3, 2020 FB6, 2020 FA7, 2020 DM4, 2019 XG1, 2016 UT80, 2016 AX147, 2013 GY7, 2009 QC36, 2009 OS5, 68350, 68278, 492143, 477524, 448818, 436324, 413989, 40267, 388945, 388838, 35107, 34613, 318050, 276732, 276274, 274138, 248926, 237551, 190166, 18172, 162210, 154993, 141525, 138847, 137064, 115052, 11066, 8566, 7088, 6047, 5626, 4581, 1864
A77Chante-Perdrix Obs. in France, 1 in MPEC 2020-H06 -- P/2020 G1
Z99Clixby Obs. in England, 1 in MPEC 2020-H13 -- 2020 GF3
850Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2020-H06, 2020-H12 & 2020-H13 -- 2020 GF3, P/2020 G1, 52768
N55Corona Borealis Obs. in Tibet, 1 in MPEC 2020-H06 -- P/2020 G1
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2020-H06 -- P/2020 G1
I48El Catalejo Obs. in Argentina, 1 in MPEC 2020-H06 -- P/2020 G1
K83Forti Obs., 1 in MPEC 2020-H06 -- P/2020 G1
W46Foxfire Village Obs., 4 in MPEC 2020-H12 -- 2020 DM4, 35107, 138847, 1627
X31Galilei Obs., 1 in MPEC 2020-H06 -- P/2020 G1
E89Geyserland Obs. in New Zealand, 1 in MPEC 2020-H06 -- P/2020 G1
203GiaGa Obs. in Italy, 1 in MPEC 2020-H06 -- P/2020 G1
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-H06 -- P/2020 G1
Z30Glyn Marsh Obs., 1 in MPEC 2020-H12 -- 52768
K73Gravina Obs. in Italy, 1 in MPEC 2020-H12 -- 52768
J95Great Shefford Obs. in England, 2 in MPECs 2020-H06 & 2020-H10 -- 2020 GD3, P/2020 G1
A17Guidestar Obs. in Germany, 2 in MPECs 2020-H12 & 2020-H13 -- 2020 GF3, 137064
240Herrenberg Obs. in Germany, 1 in MPEC 2020-H12 -- 388838
P87Hirao Obs., 1 in MPEC 2020-H12 -- 52768
L28ISON Castelgrande Obs., 1 in MPEC 2020-H06 -- P/2020 G1
Q62iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2020-H06 & 2020-H12 -- P/2020 G1, 2017 UZ44
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
Q622Marian Urbanik in Slovakia via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
Q62;Mike Mattiazzo in Victoria via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
Q62[M. Suzuki in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
Q62{Nirmal Paul in India via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H06 -- P/2020 G1
381Kiso Obs. in Japan, 1 in MPEC 2020-H12 -- 2020 GN2
1861program code 1 via Kitab Obs., 1 in MPEC 2020-H12 -- 2020 FV5
246KLENOT in the Czech Republic, 5 in MPECs 2020-H12 & 2020-H13 -- 2020 GT2, 2020 GM2, 2020 GF3, 2020 DM4, 52768
Q57Korea Microlensing Telescope Network SSO in New South Wales, 1 in MPEC 2020-H12 -- 2017 UZ44
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-H12 -- 52768
O85LiShan Obs., 13 in MPEC 2020-H12 -- 2019 WR3, 2019 WQ3, 2015 OX78, 85236, 437316, 311044, 192563, 163696, 163373, 162723, 159454, 137199, 103067
130Lumezzane Obs. in Italy, 14 in MPECs 2020-H06 & 2020-H12 -- 2020 GN2, P/2020 G1, 2009 QC36, 494880, 413989, 318050, 276274, 237551, 190166, 163243, 154229, 136618, 4581, 1866
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2020-H12 -- 2020 FA7, 2015 FP332
108Montelupo Obs. in Italy, 1 in MPEC 2020-H06 -- P/2020 G1
G96Mt. Lemmon Survey (MLS) in Arizona, 53 in MPECs 2020-H05, 2020-H07, 2020-H08, 2020-H09, 2020-H10, 2020-H11 & 2020-H12 -- 2020 GZ2, 2020 GS1, 2020 GE3, 2020 GD3, 2020 GC3, 2020 GB3, 2020 GA3, 2020 FV6, 2020 FM6, 2020 AZ2, 2019 XL1, 2019 UO, 2018 VX, 2017 FE90, 2015 RH2, 2006 YU1, 2006 PY17, 2005 UO157, 2005 LV7, 2004 RE84, 2004 FF29, 2002 VP69, 2001 GS2, 2000 EM26, 86667, 68063, 53409, 519354, 515446, 510262, 494706, 443103, 390929, 339714, 31345, 277142, 275976, 219527, 203217, 193178, 186822, 18109, 164400, 163679, 162422, 16064, 154589, 152941, 152561, 141765, 137911, 136923, 7753
C82Nastro Verde Obs. in Italy, 1 in MPEC 2020-H12 -- 52768
C47Nonndorf Obs. in Austria, 1 in MPEC 2020-H12 -- 52768
Z80Northolt Branch Obs. in England, 2 in MPEC 2020-H12 -- 2020 GT2, 2020 GN2
G34Oberfrauendorf Obs. in Germany, 3 in MPECs 2020-H12 & 2020-H13 -- 2020 GT2, 2020 GF3, 2020 GD2
C23Olmen Obs. in Belgium, 1 in MPEC 2020-H06 -- P/2020 G1
F51Pan-STARRS 1 (PS1) in Hawaii, 23 in MPECs 2020-H12 & 2020-H13 -- 2020 GY1, 2020 GF3, 2020 GD1, 2020 FE6, 2020 BU16, 2019 GJ20, 2017 DS36, 2016 WE1, 2016 LF51, 2015 DZ197, 2014 HO4, 2012 QQ10, 2012 EM8, 2009 KK8, 2004 RY10, 2000 WO148, 54686, 415746, 349928, 162063, 159635, 159560, 154993
F52Pan-STARRS 2 (PS2) in Hawaii, 16 in MPECs 2020-H09 & 2020-H12 -- 2020 GC3, 2020 FX4, 2020 FR6, 2020 BR16, 2016 GT220, 2013 ON5, 2007 HX82, 86067, 85275, 468541, 463257, 363626, 329275, 136618, 11066, 1917
K63Pascoli Obs. in Italy, 4 in MPECs 2020-H07, 2020-H12 & 2020-H13 -- 2020 GZ2, 2020 GF3, 2020 GA3, 52768
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2020-H12 -- 2020 GT2, 2020 GD2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2020-H12 -- 2020 FO2, 2020 FM6, 2020 FB6, 2020 FA3, 2019 XG1, 2015 FT118, 2010 EC135, 2009 QC36, 2001 GS2
L18QOS Obs., 2 in MPEC 2020-H12 -- 2020 GD2, 52768
L04ROASTERR-1 in Romania, 1 in MPEC 2020-H06 -- P/2020 G1
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2020-H06 -- P/2020 G1
L40Saarbruecken Rastpfuhl Obs., 2 in MPEC 2020-H12 -- 2020 GT2, 52768
C95SATINO-1 in France, 1 in MPEC 2020-H12 -- 2020 AY1
204Schiaparelli Obs. in Italy, 2 in MPECs 2020-H06 & 2020-H13 -- 2020 GF3, P/2020 G1
033Schwarzschild Obs. in Germany, 9 in MPECs 2020-H05, 2020-H07, 2020-H08, 2020-H09, 2020-H10, 2020-H11, 2020-H12 & 2020-H13 -- 2020 GZ2, 2020 GT2, 2020 GN2, 2020 GF3, 2020 GE3, 2020 GD3, 2020 GC3, 2020 GB3, 2020 GA3
G402program code 2 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-H06 -- P/2020 G1
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-H06 -- P/2020 G1
Y00SONEAR in Brazil, 1 in MPEC 2020-H06 -- P/2020 G1
587Sormano Obs. in Italy, 1 in MPEC 2020-H06 -- P/2020 G1
L06Sormano2 Obs. in Italy, 1 in MPEC 2020-H06 -- P/2020 G1
W34Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-H12 -- 2020 DM4
I52Steward Obs. Mt. Lemmon Station in Arizona, 14 in MPECs 2020-H05, 2020-H06, 2020-H07, 2020-H08, 2020-H09, 2020-H10, 2020-H12 & 2020-H13 -- 2020 GZ2, 2020 GX2, 2020 GU2, 2020 GT2, 2020 GS2, 2020 GM2, 2020 GF3, 2020 GD3, 2020 GC3, 2020 GB3, 2020 GA3, P/2020 G1, 2020 FJ2, 2018 VX
Q38Swan Hill Obs., 1 in MPEC 2020-H06 -- P/2020 G1
A16Tentlingen Obs. in Switzerland, 6 in MPECs 2020-H06 & 2020-H12 -- P/2020 G1, 2020 FA7, 85628, 40267, 190166, 137064
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-H12 -- 2019 QF
L01Visnjan Obs. in Croatia, 6 in MPECs 2020-H07, 2020-H08, 2020-H10, 2020-H11 & 2020-H12 -- 2020 GZ2, 2020 GE3, 2020 GD3, 2020 GB3, 2020 GA3, 2015 FT118
Z92West Park Obs. in England, 1 in MPEC 2020-H12 -- 52768
718Wiggins Obs. in Utah, 1 in MPEC 2020-H06 -- P/2020 G1
C51WISE in Earth polar orbit, 1 in MPEC 2020-H12 -- 2018 BN3
Q78Woogaroo Obs., 5 in MPEC 2020-H12 -- 2020 GA2, 2020 FV6, 2020 FM6, 2020 DM4, 2017 ES2
I41Zwicky Transient Facility (ZTF) in southern California, 8 in MPEC 2020-H12 -- 2020 GN2, 463282, 448818, 425450, 40267, 231792, 154993, 1866
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 GA3NEODyS16012052-2118475.06e-06-5.41-6.250NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2020-04-15.411 to 2020-04-17.084."
JPL Sentry16002054-2119249.5902772e-06-5.16-5.770JPL: Computed at 01:07 today Pacific time based on 24 observations spanning 1.6734 days (2020-Apr-15.41021 to 2020-Apr-17.08364). Diameter approximately 0.032 km. from weighted mean H=25.11.
2020 GZ2NEODyS16012049-2083178.0e-05-5.35-5.370NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2020-04-15.392 to 2020-04-17.070."
JPL Sentry16002049-2082219.584006e-05-5.27-5.310JPL #2 for the day: Computed at 07:15 today Pacific time based on 21 observations spanning 1.6786 days (2020-Apr-15.39078 to 2020-Apr-17.06941). Diameter approximately 0.009 km. from weighted mean H=27.90.
2020 GY2NEODyS16012093-2118111.87e-06-5.23-5.450NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2020-04-15.350 to 2020-04-16.946."
JPL Sentry01402093-2118131.9031496e-06-5.22-5.500JPL: Computed at 17:58 April 16th Pacific time based on 33 observations spanning 1.5963 days (2020-Apr-15.34915 to 2020-Apr-16.94546). Diameter approximately 0.060 km. from weighted mean H=23.74.
2019 QFJPL Sentry16002069-207723.64e-07-7.89-8.130JPL: Computed at 06:59 today Pacific time based on 28 observations spanning 14.324 days (2019-Aug-21.23858 to 2019-Sep-04.562772). Diameter approximately 0.009 km. from weighted mean H=27.91.
NEODyS16002062-211841.79e-07-8.20-8.420NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2019-08-21.239 to 2019-09-04.564."

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 17 April '20

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

1600Noted that JPL Sentry has updated its 2019 QF risk assessment - see above
Noted that NEODyS has updated its 2019 QF risk assessment - see above
Noted that JPL Sentry has posted 2020 GA3 as an impact risk - see above
Noted that NEODyS has posted 2020 GA3 as an impact risk - see above
Noted that NEODyS has posted 2020 GY2 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 GZ2 risk assessment - see above
Noted that NEODyS has posted 2020 GZ2 as an impact risk - see above
Grabbed MPEC 2020-H07 - 2020 GA3 - see above
Grabbed MPEC 2020-H08 - 2020 GB3 - see above
Grabbed MPEC 2020-H09 - 2020 GC3 - see above
Grabbed MPEC 2020-H10 - 2020 GD3 - see above
Grabbed MPEC 2020-H11 - 2020 GE3 - see above
Grabbed MPEC 2020-H12 - Daily Orbit Update - see above
Grabbed MPEC 2020-H13 - 2020 GF3 - see above
Noted Radar Astrometry database update - see above
0503Grabbed MPEC 2020-H06 - Comet P/2020 G1 (Pimentel) - see above
0430Noted that JPL Sentry has posted 2020 GZ2 as an impact risk - see above
0140Noted that JPL Sentry has posted 2020 GY2 as an impact risk - see above
Grabbed MPEC 2020-H05 - 2020 GZ2 - see above