Contents  on 13 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 13 February '20

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of eighteen 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 13 February '20

Minor Planet Electronic Circulars

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


<< DOU on 13 February '20 >>  MPEC 2020-C133 - "12:05 UT" - Daily Orbit Update

Observers  on 13 February '20

Twelve observers appear in today's MPEC.

CodeObserver / observatory
T08ATLAS Mauna Loa in Hawaii, 2 in MPEC 2020-C133 -- 2003 OC3, 474223
K87Dettelbach Vineyard Obs. in Germany, 5 in MPEC 2020-C133 -- 2020 CX1, 2020 BX10, 2020 BW14, 2020 BR10, 2020 BP14
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2020-C133 -- 2015 BK509
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPEC 2020-C133 -- 2020 CE1, 2020 BQ12, 2020 BQ1, 2020 BD, 2020 AY1
W87LCO Cerro Tololo C in Chile, 1 in MPEC 2020-C133 -- 2020 BR10
Z80Northolt Branch Obs. in England, 4 in MPEC 2020-C133 -- 2020 CC, 2020 BZ11, 2008 EE5, 163373
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2020-C133 -- 2018 XV5, 2003 OC3
C95SATINO-1 in France, 1 in MPEC 2020-C133 -- 2015 BK509
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2020-C133 -- 2020 CX1, 2020 BT, 2020 BS11, 2020 BJ6, 2020 BJ4, 2020 BJ14, 2020 BF5, 2019 YP5, 2019 WF3, 2006 BA9
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 3 in MPEC 2020-C133 -- 2020 BY11, 2020 BH7, 2020 BC2
C51WISE in Earth polar orbit, 1 in MPEC 2020-C133 -- 18882
I41Zwicky Transient Facility (ZTF) in southern California, 14 in MPEC 2020-C133 -- 2019 XN1, 2019 XG1, 2011 CT4, 462736, 459386, 416591, 34613, 331792, 232368, 159454, 137925, 136993, 12923, 106589
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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 CX1JPL Sentry16152104-210411.545e-09-8.71-8.710JPL: Computed at 06:22 today Pacific time based on 36 observations spanning 7.8233 days (2020-Feb-05.41525 to 2020-Feb-13.23856). Diameter approximately 0.051 km. from weighted mean H=24.09.
2020 CE1JPL Sentry16152095-209525.303e-06-5.72-5.990JPL: Computed at 05:58 today Pacific time based on 23 observations spanning 11.119 days (2020-Feb-02.15265 to 2020-Feb-13.27117). Diameter approximately 0.024 km. from weighted mean H=25.73.
NEODyS1615209526.72e-06-5.63-5.930NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2020-02-02.153 to 2020-02-13.272."
2020 BJ14JPL Sentry16152082-208722.02087e-05-4.43-4.430JPL: Computed at 05:58 today Pacific time based on 64 observations spanning 13.986 days (2020-Jan-30.399864 to 2020-Feb-13.38556). Diameter approximately 0.049 km. from weighted mean H=24.18.
2020 BY11JPL Sentry16152114-212031.56e-07-8.48-8.920JPL: Computed at 06:00 today Pacific time based on 29 observations spanning 6.9154 days (2020-Jan-26.41131 to 2020-Feb-02.32674). Diameter approximately 0.009 km. from weighted mean H=27.93.
NEODyS16152114-211857.68e-08-8.81-9.050NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2020-01-26.412 to 2020-02-02.328."
2020 BH7JPL Sentry1615R E M O V E DJPL: Risk listing removed at 1358 UTC today
2020 AY1JPL Sentry16152103-210311.636e-07-7.28-7.280JPL: Computed at 06:07 today Pacific time based on 124 observations spanning 39.082 days (2020-Jan-05.24158 to 2020-Feb-13.32325). Diameter approximately 0.031 km. from weighted mean H=25.22.
NEODyS1615210313.64e-08-7.95-7.950NEODyS: "Based on 125 optical observations (of which 4 are rejected as outliers) from 2020-01-05.242 to 2020-02-13.324."
2017 AA21JPL Sentry16152024-21171942.3962655e-06-6.01-6.920JPL: Computed at 11:52 April 6th of 2017 Pacific time based on 7 observations spanning .98032 days (2017-Jan-03.45994 to 2017-Jan-04.44026). Diameter approximately 0.021 km. from weighted mean H=26.04.

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 13 February '20

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

1615Noted that JPL Sentry has updated its 2017 AA21 risk assessment - see above
Noted that JPL Sentry has updated its 2020 AY1 risk assessment - see above
Noted that NEODyS has updated its 2020 AY1 risk assessment - see above
Noted that JPL Sentry has removed 2020 BH7 as an impact risk - see above
Noted that JPL Sentry has updated its 2020 BJ14 risk assessment - see above
Noted that JPL Sentry has updated its 2020 BY11 risk assessment - see above
Noted that NEODyS has updated its 2020 BY11 risk assessment - see above
Noted that JPL Sentry has updated its 2020 CE1 risk assessment - see above
Noted that NEODyS has updated its 2020 CE1 risk assessment - see above
Noted that JPL Sentry has updated its 2020 CX1 risk assessment - see above
Grabbed MPEC 2020-C133 - Daily Orbit Update - see above