Contents  on 23 February '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 23 February '20

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 32 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 23 February '20

Minor Planet Electronic Circulars

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


MPEC 2020-D100 - "22:46 UT" - 2020 DZ2


MPEC 2020-D99 - "20:08 UT" - 2020 DY2


MPEC 2020-D98 - "19:19 UT" - 2020 DX2


<< DOU on 23 February '20 >>  MPEC 2020-D97 - "12:16 UT" - Daily Orbit Update


MPEC 2020-D96 - "08:52 UT" - 2020 DV2

Observers  on 23 February '20

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2020-D97 -- 35107
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2020-D96, 2020-D97 & 2020-D100 -- 2020 DZ2, 2020 DV2, 2020 DT1, 2020 DM, 2020 BO3, 2019 YR6, 2018 KP1, 2016 TK, 2016 QD, 2015 SV2, 2015 FE37, 2013 VK5, 2006 WF129, 413038, 277810, 242147
T05ATLAS Haleakala in Hawaii, 1 in MPEC 2020-D97 -- 2017 XD
T08ATLAS Mauna Loa in Hawaii, 32 in MPEC 2020-D97 -- 2020 DZ1, 2020 DP2, 2020 CL2, 2020 BE2, 2019 WB6, 2017 BM123, 2016 UT80, 2015 OL35, 2015 BK509, 2008 EE5, 2005 SQ, 85628, 68350, 506459, 500094, 36284, 353947, 35107, 34613, 30825, 159454, 154029, 141052, 138846, 11405, 7088, 6239, 5693, 5626, 3752, 1864, 1627
V00Bok Telescope in Arizona, 2 in MPECs 2020-D96 & 2020-D100 -- 2020 DZ2, 2020 DV2
160Castelmartini Obs. in Italy, 16 in MPEC 2020-D97 -- 2019 XG1, 2017 BM123, 2008 EE5, 90075, 525364, 512245, 374188, 34613, 30825, 243025, 18172, 159454, 138013, 11405, 106589, 106538
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2020-D98 & 2020-D99 -- 2020 DY2, 2020 DX2
W46Foxfire Village Obs., 3 in MPEC 2020-D97 -- 2020 DX, 2015 BK509, 2003 OC3
K73Gravina Obs. in Italy, 1 in MPEC 2020-D97 -- 2003 OC3
511Haute Provence Obs. in Germany, 1 in MPEC 2020-D97 -- 99942
1861program code 1 via Kitab Obs., 2 in MPEC 2020-D97 -- 2020 BZ12, 2017 BM123
Z43Landehen Obs., 1 in MPEC 2020-D97 -- 2017 BM123
W85LCO Cerro Tololo A in Chile, 1 in MPEC 2020-D98 -- 2020 DX2
130Lumezzane Obs. in Italy, 8 in MPEC 2020-D97 -- 2020 BB16, 2015 BK509, 500094, 391275, 353947, 34613, 162080, 138013
C94MASTER-II Tunka in Russia, 1 in MPEC 2020-D97 -- 1864
568^R. Wainscoat on Mauna Kea in Hawaii, 1 in MPEC 2020-D99 -- 2020 DY2
474Mt. John Obs. in New Zealand, 2 in MPECs 2020-D98 & 2020-D99 -- 2020 DY2, 2020 DX2
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2020-D96, 2020-D98, 2020-D99 & 2020-D100 -- 2020 DZ2, 2020 DY2, 2020 DX2, 2020 DV2
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2020-D97 -- 2020 DR2
C95SATINO-1 in France, 1 in MPEC 2020-D97 -- 2015 PZ228
033Schwarzschild Obs. in Germany, 1 in MPEC 2020-D96 -- 2020 DV2
G40!M. Kumrucu-Lohmiller in Massachusetts via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-D97 -- 2017 BM123
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2020-D100 -- 2020 DZ2
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2020-D97 -- 2020 DZ1, 52768
I52Steward Obs. Mt. Lemmon Station in Arizona, 1 in MPEC 2020-D99 -- 2020 DY2
A16Tentlingen Obs. in Switzerland, 3 in MPEC 2020-D97 -- 163694, 138013, 5693
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-D97 -- 2020 CK2
L01Visnjan Obs. in Croatia, 4 in MPECs 2020-D96, 2020-D98, 2020-D99 & 2020-D100 -- 2020 DZ2, 2020 DY2, 2020 DX2, 2020 DV2
I15Wishing Star Obs. in Rhode Island, 3 in MPEC 2020-D97 -- 448818, 18172, 1627
I41Zwicky Transient Facility in southern California, 1 in MPEC 2020-D97 -- 2009 AH16
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 February '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 DR2JPL Sentry17352044-2114312.1178379e-06-2.51-2.930JPL: Computed at 09:03 today Pacific time based on 113 observations spanning 2.6916 days (2020-Feb-20.19345 to 2020-Feb-22.88509). Diameter approximately 0.584 km. from weighted mean H=18.81.
NEODyS16502062-2114231.53e-06-2.66-3.030NEODyS: "Based on 111 optical observations (of which 1 are rejected as outliers) from 2020-02-20.194 to 2020-02-22.818."
2020 CK2JPL Sentry17352063-2118600.002426155652-4.79-4.900JPL: Computed at 09:06 today Pacific time based on 24 observations spanning 5.1459 days (2020-Feb-14.50537 to 2020-Feb-19.651233). Diameter approximately 0.005 km. from weighted mean H=29.26.
2020 BU13NEODyS1650R E M O V E D-
2020 BHJPL Sentry00332104-211132.2276e-05-6.67-6.830JPL: Computed at 16:03 Feb. 22nd Pacific time based on 58 observations spanning 28.060 days (2020-Jan-18.33189 to 2020-Feb-15.39195). Diameter approximately 0.008 km. from weighted mean H=28.23.

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 23 February '20

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

2302Grabbed MPEC 2020-D100 - 2020 DZ2 - see above
2120Grabbed MPEC 2020-D99 - 2020 DY2 - see above
2001Grabbed MPEC 2020-D98 - 2020 DX2 - see above
1735Noted that JPL Sentry has updated its 2020 CK2 risk assessment - see above
Noted that JPL Sentry has updated its 2020 DR2 risk assessment - see above
1650Noted that NEODyS has removed 2020 BU13 as an impact risk - see above
Noted that NEODyS has posted 2020 DR2 as an impact risk - see above
Grabbed MPEC 2020-D96 - 2020 DV2 - see above
Grabbed MPEC 2020-D97 - Daily Orbit Update - see above
0033Noted that JPL Sentry has updated its 2020 BH risk assessment - see above