Contents  on 3 May '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 3 May '20

Radar observation of seven 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 0411 UTC when the database was dated 2 May


Data update noted at 0500 UTC when the database was dated 2 May


Data update noted at 1800 UTC when the database was dated 2 May



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

NEOCP Activity  on 3 May '20

The MPC's NEO Confirmation Page has 57 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 57 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 68 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 3 May '20

Minor Planet Electronic Circulars

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


MPEC 2020-J27 - "22:15 UT" - 2020 JC


MPEC 2020-J26 - "13:41 UT" - 2020 HH10


<< DOU on 3 May '20 >>  MPEC 2020-J25 - "12:03 UT" - Daily Orbit Update


MPEC 2020-J24 - "03:33 UT" - 2020 JB


MPEC 2020-J23 - "01:56 UT" - Comet C/2020 H6 (ATLAS)


MPEC 2020-J22 - "00:48 UT" - Comet C/2020 H5 (Robinson)


MPEC 2020-J21 - "00:15 UT" - Comet C/2020 H4 (Leonard)


MPEC 2020-J20 - "00:05 UT" - 2018 EP1

Observers  on 3 May '20

A total of 40 observers appear in today's MPECs.

CodeObserver / observatory
R57Aorangi Iti Obs. in New Zealand, 1 in MPEC 2020-J23 -- C/2020 H6
E23Arcadia Obs. in New South Wales, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
251Arecibo in Puerto Rico, 7 in radar -- 2020 HW3, 2020 HU2, 2020 HK3, 2020 HD10, 2020 DT3, 52768, 388945
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2020-J25 & 2020-J26 -- 2020 HX1, 2020 HV6, 2020 HU1, 2020 HP2, 2020 HH5, 2020 HH10, 2020 HG4, 2020 HE3, 2020 HD1, 2020 HB8, 2020 EM, 2017 MW7, 2010 GB6, 456946, 331509
T05ATLAS Haleakala in Hawaii, 18 in MPECs 2020-J22, 2020-J23 & 2020-J25 -- C/2020 H6, C/2020 H5, 2020 GF3, 2020 FB6, 86667, 85628, 68350, 539940, 522684, 468910, 436030, 388945, 318050, 30825, 163250, 11405, 106589, 1627
T08ATLAS Mauna Loa in Hawaii, 19 in MPEC 2020-J25 -- 2020 HF1, 2020 GD2, 2014 JO25, 2010 JJ3, 2000 HO40, 99935, 54401, 394783, 36183, 349063, 315098, 19764, 141053, 11284, 8014, 6050, 4954, 3352, 1685
X74Campo dos Amarais Obs., 1 in MPEC 2020-J23 -- C/2020 H6
Z36Cancelada Obs., 1 in MPEC 2020-J25 -- 137199
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 2020 HW1, 2015 FP332, 2014 HO4, 2011 FZ2, 2010 XD11, 436324, 333555, 331471, 152978, 137199, 4257, 1866
V06Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2020-J26 -- 2020 HH10
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2020-J24 -- 2020 JB
N31Eden Obs., 1 in MPEC 2020-J25 -- 68350
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2020-J21 -- C/2020 H4
734Farpoint Obs. in Kansas, 1 in MPEC 2020-J24 -- 2020 JB
W46Foxfire Village Obs., 2 in MPEC 2020-J25 -- 2020 HB6, 2020 GF3
X31Galilei Obs., 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
E94Gisborne Obs. in New Zealand, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
J95Great Shefford Obs. in England, 2 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 2020 HD10
Q620Ernesto Guido in Italy via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-J23 -- C/2020 H6
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 3 in MPECs 2020-J21, 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5, C/2020 H4
U68JPL SynTrack Robotic Telescope, 1 in MPEC 2020-J25 -- 2020 HB6
474Mt. John Obs. in New Zealand, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
G96Mt. Lemmon Survey (MLS) in Arizona, 41 in MPECs 2020-J20, 2020-J21, 2020-J25, 2020-J26 & 2020-J27 -- 2020 JC, 2020 JA, 2020 HY8, 2020 HQ4, 2020 HN6, 2020 HL4, 2020 HH10, 2020 HG9, C/2020 H4, 2019 YW3, 2018 EP1, 2015 LK21, 2014 UA192, 2009 KK8, 2006 KQ21, 2004 MW2, 2004 FF29, 1998 HN3, 68278, 495891, 494706, 471034, 387733, 36183, 277142, 219527, 20460, 203217, 18109, 175189, 164400, 15817, 154589, 152941, 137064, 136923, 103067, 8035, 8014, 7753, 6050
Z80Northolt Branch Obs. in England, 3 in MPEC 2020-J25 -- 2020 HD10, 436030, 333555
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2020-J20 & 2020-J25 -- 2020 HV2, 2018 EP1, 2008 LW16, 136874, 1866
F52Pan-STARRS 2 (PS2) in Hawaii, 7 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 86067, 37655, 218863, 155341, 144861, 142781
B49Paus Obs. in Spain, 1 in MPEC 2020-J24 -- 2020 JB
323Perth Obs. in Western Australia, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
V93Pin Oak Obs., 3 in MPEC 2020-J25 -- 99935, 388945, 1627
654Pomona College Table Mtn. Obs. (PCTMO) in southern California, 2 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 2020 JA
H36Sandlot Obs. in Kansas, 2 in MPECs 2020-J24 & 2020-J27 -- 2020 JC, 2020 JB
C95SATINO-1 in France, 1 in MPEC 2020-J25 -- 2020 BB16
204Schiaparelli Obs. in Italy, 8 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 2020 HM7, 2020 HL6, 2020 HD10, 2020 HB6, 2016 HP6, 2014 JO25, 539940
W88(program code "(" (17) via Slooh.com Chile Obs. in Chile, 1 in MPEC 2020-J22 -- C/2020 H5
W883B. Lutkenhoner in Germany via Slooh.com Chile Obs. in Chile, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
W884G. Gasparovic in Croatia via Slooh.com Chile Obs. in Chile, 2 in MPECs 2020-J22 & 2020-J23 -- C/2020 H6, C/2020 H5
W34Squirrel Valley Obs. in North Carolina, 2 in MPECs 2020-J24 & 2020-J25 -- 2020 JB, 2020 JA
I52Steward Obs. Mt. Lemmon Station in Arizona, 16 in MPECs 2020-J20, 2020-J21, 2020-J24, 2020-J25, 2020-J26 & 2020-J27 -- 2020 JC, 2020 JB, 2020 HZ4, 2020 HY8, 2020 HW1, 2020 HR8, 2020 HO9, 2020 HH10, 2020 HG9, 2020 HF7, 2020 HD4, 2020 HC10, 2020 HB2, 2020 HA10, C/2020 H4, 2018 EP1
858Tebbutt Obs. in New Mexico, 1 in MPEC 2020-J24 -- 2020 JB
W33Transit Dreams Obs., 8 in MPEC 2020-J25 -- 86667, 85628, 68278, 66251, 186822, 175189, 137064, 136923
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-J25 -- 2018 TP5
L01Visnjan Obs. in Croatia, 3 in MPECs 2020-J21, 2020-J24 & 2020-J27 -- 2020 JC, 2020 JB, C/2020 H4
I41Zwicky Transient Facility (ZTF) in southern California, 5 in MPEC 2020-J25 -- 86067, 500094, 373428, 35107, 190166
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 May '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 Sentry18002056-207324.68068e-08-6.00-6.000JPL: Computed at 06:31 today Pacific time based on 39 observations spanning 6.0029 days (2020-Apr-27.38722 to 2020-May-03.39009). Diameter approximately 0.091 km. from weighted mean H=22.84.
NEODyS1800207316.81e-09-6.85-6.850NEODyS: "Based on 39 optical observations (of which 1 are rejected as outliers) from 2020-04-27.388 to 2020-05-03.391."
2020 HM7NEODyS1800R E M O V E D-
2020 HL6JPL Sentry18002069-211557.5934e-07-7.90-8.230JPL: Computed at 06:36 today Pacific time based on 35 observations spanning 12.495 days (2020-Apr-19.44533 to 2020-May-01.94015). Diameter approximately 0.008 km. from weighted mean H=28.03.
NEODyS18002069-2117106.35e-07-8.09-8.540NEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2020-04-19.446 to 2020-05-01.941."
2020 HQ4JPL Sentry18002052-2120540.0001433146438-4.99-5.360JPL: Computed at 06:45 today Pacific time based on 92 observations spanning 10.059 days (2020-Apr-22.14953 to 2020-May-02.20881). Diameter approximately 0.015 km. from weighted mean H=26.82.
NEODyS18002051-21181771.6e-04-4.98-5.360NEODyS: "Based on 95 optical observations (of which 1 are rejected as outliers) from 2020-04-22.150 to 2020-05-02.210."
2018 TP5JPL Sentry18002074-2105261.857444e-05-5.27-5.890JPL: Computed at 06:34 today Pacific time based on 43 observations spanning 53.735 days (2018-Oct-10.3155 to 2018-Dec-03.050513). Diameter approximately 0.024 km. from weighted mean H=25.71.
NEODyS18002074-2113661.93e-05-5.28-5.90NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2018-10-10.316 to 2018-12-03.051."
2016 VA18JPL Sentry18002022-21165002.5316195e-06-7.03-7.690JPL: Computed at 12:49 April 6th of 2017 Pacific time based on 9 observations spanning .14092 days (2016-Nov-06.29285 to 2016-Nov-06.43377). Diameter approximately 0.007 km. from weighted mean H=28.48.

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 3 May '20

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

2308Grabbed MPEC 2020-J27 - 2020 JC - see above
1800Noted that JPL Sentry has updated its 2016 VA18 risk assessment - see above
Noted that JPL Sentry has updated its 2018 TP5 risk assessment - see above
Noted that NEODyS has updated its 2018 TP5 risk assessment - see above
Noted that JPL Sentry has updated its 2020 HL6 risk assessment - see above
Noted that NEODyS has updated its 2020 HL6 risk assessment - see above
Noted that NEODyS has removed 2020 HM7 as an impact risk - 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 updated its 2020 HY8 risk assessment - see above
Noted that NEODyS has updated its 2020 HY8 risk assessment - see above
Grabbed MPEC 2020-J25 - Daily Orbit Update - see above
Grabbed MPEC 2020-J26 - 2020 HH10 - see above
Noted Radar Astrometry database update - see above
0500Noted Radar Astrometry database update - see above
0411Grabbed MPEC 2020-J21 - Comet C/2020 H4 (Leonard) - see above
Grabbed MPEC 2020-J22 - Comet C/2020 H5 (Robinson) - see above
Grabbed MPEC 2020-J23 - Comet C/2020 H6 (ATLAS) - see above
Grabbed MPEC 2020-J24 - 2020 JB - see above
Noted Radar Astrometry database update - see above
0008Grabbed MPEC 2020-J20 - 2018 EP1 - see above