Contents  on 8 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 8 April '20

Radar observation of four objects

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


Data update noted at 0018 UTC when the database was dated 7 April


Data update noted at 0403 UTC when the database was dated 7 April


Data update noted at 0454 UTC when the database was dated 7 April



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

NEOCP Activity  on 8 April '20

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 25 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 8 April '20

Minor Planet Electronic Circulars

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


MPEC 2020-G75 - "22:47 UT" - Comet C/2020 F6 (Panstarrs)


<< DOU on 8 April '20 >>  MPEC 2020-G74 - "12:13 UT" - Daily Orbit Update


MPEC 2020-G73 - "02:37 UT" - Comet C/2020 F5 (Master)

Observers  on 8 April '20

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

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2015 EG, 264357
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2020-G74 -- 65690, 539940, 35107, 137199, 9400, 1866
I47Auger Obs. in Argentina, 1 in MPEC 2020-G73 -- C/2020 F5
L54Berthelot Obs., 1 in MPEC 2020-G74 -- 363599
160Castelmartini Obs. in Italy, 12 in MPEC 2020-G74 -- 2020 DT3, 2020 DM4, 54686, 52768, 388838, 374188, 36284, 35107, 30825, 154993, 11405, 106589
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2020-G73 -- C/2020 F5
I48El Catalejo Obs. in Argentina, 1 in MPEC 2020-G73 -- C/2020 F5
X31Galilei Obs., 1 in MPEC 2020-G73 -- C/2020 F5
E94Gisborne Obs. in New Zealand, 1 in MPEC 2020-G74 -- 2020 BP14
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 2016 BC14, 2015 MA54
Q62iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-G73 -- C/2020 F5
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-G73 -- C/2020 F5
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 2 in MPECs 2020-G73 & 2020-G75 -- C/2020 F6, C/2020 F5
Q625Cristovao Jacques in Brazil via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-G73 -- C/2020 F5
Q62`Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-G73 -- C/2020 F5
C401program code 1 via Kuban State Univ. Obs. in Russia, 1 in MPEC 2020-G74 -- 52768
K30Luscherz Obs. in Switzerland, 1 in MPEC 2020-G74 -- 413989
K38M57 Obs. in Italy, 2 in MPEC 2020-G74 -- 2020 FN1, 2020 DM4
W92MASTER OAFA Obs., 1 in MPEC 2020-G73 -- C/2020 F5
K95MASTER-II Sutherland in South Africa, 2 in MPECs 2020-G73 & 2020-G74 -- C/2020 F5, 99935
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-G75 -- C/2020 F6
Z80Northolt Branch Obs. in England, 2 in MPEC 2020-G74 -- 2020 GB1, 2020 FW4
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2020-G74 & 2020-G75 -- C/2020 F6, 500094
F52Pan-STARRS 2 (PS2) in Hawaii, 5 in MPEC 2020-G74 -- 40267, 34613, 8566, 5626, 1627
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2020-G74 -- 137064, 1866
L40Saarbruecken Rastpfuhl Obs., 1 in MPEC 2020-G74 -- 52768
H36Sandlot Obs. in Kansas, 1 in MPEC 2020-G74 -- 2019 UT9
C95SATINO-1 in France, 1 in MPEC 2020-G74 -- 2019 YA4
204Schiaparelli Obs. in Italy, 11 in MPEC 2020-G74 -- 2020 GM, 2020 GF1, 2020 GF, 2020 FQ6, 2020 FL4, 2020 FF5, 2020 FA7, 2020 DT3, 2019 LF6, 2017 FE90, 52768
W88#program code "#" (12) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-G73 -- C/2020 F5
W88%program code "%" (14) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-G73 -- C/2020 F5
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-G75 -- C/2020 F6
Q38Swan Hill Obs., 1 in MPEC 2020-G73 -- C/2020 F5
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-G74 -- 35107, 137199, 136795
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 2 in MPEC 2020-G74 -- 2020 CO2, 2020 BK3
L01Visnjan Obs. in Croatia, 1 in MPEC 2020-G75 -- C/2020 F6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 GB1JPL Sentry17002049-2115202.623108e-05-5.48-5.600JPL: Computed at 07:15 today Pacific time based on 121 observations spanning 4.4348 days (2020-Apr-02.534924 to 2020-Apr-06.969728). Diameter approximately 0.014 km. from weighted mean H=26.93.
NEODyS17002054-2115206.54e-06-6.27-6.40NEODyS: "Based on 121 optical observations (of which 2 are rejected as outliers) from 2020-04-02.536 to 2020-04-06.971."
2020 CO2JPL Sentry17002048-2118253.56250582e-05-5.20-5.410JPL: Computed at 07:02 today Pacific time based on 49 observations spanning 4.9177 days (2020-Feb-14.29639 to 2020-Feb-19.21409). Diameter approximately 0.016 km. from weighted mean H=26.66.
NEODyS17002048-2118291.28e-05-5.73-5.880NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2020-02-14.297 to 2020-02-19.215."
2020 BK3JPL Sentry17002091-210566.196958e-05-5.33-5.340JPL: Computed at 07:04 today Pacific time based on 96 observations spanning 28.090 days (2020-Jan-22.395303 to 2020-Feb-19.485235). Diameter approximately 0.014 km. from weighted mean H=26.93.
NEODyS17002091-210566.05e-05-5.35-5.350NEODyS: "Based on 96 optical observations (of which 0 are rejected as outliers) from 2020-01-22.396 to 2020-02-19.486."

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 8 April '20

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

2300Grabbed MPEC 2020-G75 - Comet C/2020 F6 (Panstarrs) - see above
1700Noted that JPL Sentry has updated its 2020 BK3 risk assessment - see above
Noted that NEODyS has updated its 2020 BK3 risk assessment - see above
Noted that JPL Sentry has updated its 2020 CO2 risk assessment - see above
Noted that NEODyS has updated its 2020 CO2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 GB1 risk assessment - see above
Noted that NEODyS has updated its 2020 GB1 risk assessment - see above
Grabbed MPEC 2020-G74 - Daily Orbit Update - see above
0454Noted Radar Astrometry database update - see above
0403Grabbed MPEC 2020-G73 - Comet C/2020 F5 (Master) - see above
Noted Radar Astrometry database update - see above
0018Noted Radar Astrometry database update - see above