Contents  on 7 February '10


The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity  on 7 February '10

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of seven listings on the NEOCP at some point 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 7 February '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 Feb. '10 >>  MPEC 2010-C18 - "07:19 UT" - Daily Orbit Update

Observers  on 7 February '10

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
B88Bigmuskie Obs. in Italy, 1 in MPEC 2010-C18 -- 54789
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2010-C18 -- 2010 BG2, 2006 AO4, 159402, 153243, 10165, 1916
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2010-C18 -- 1864
J28Jaen Obs. in Spain, 1 in MPEC 2010-C18 -- 2010 BB3
J75La Sagra Obs. in Spain, 1 in MPEC 2010-C18 -- 2009 XC2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2010-C18 -- 8567
A13Naef Obs. in Switzerland, 1 in MPEC 2010-C18 -- 2006 AO4
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2010-C18 -- 2010 AD3, 2009 SV17, 2007 CN26, 2000 YH4
926Tenagra II Obs. in Arizona, 1 in MPEC 2010-C18 -- 2010 CA
D96Tzec Maun Obs. Moorook in South Australia, 2 in MPEC 2010-C18 -- 2009 UN3, 2002 XY38
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 February '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2010 CAJPL Sentry16352019-2056196.3e-05-3.32-3.730JPL: "Analysis based on 20 observations spanning 1.9360 days (2010-Feb-05.19638 to 2010-Feb-07.13235)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
NEODyS16352019-2056195.89e-05-3.35-3.750NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/07.133."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 7 February '10

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

1635Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Noted that NEODyS has posted 2010 CA as an impact risk - see above
Grabbed MPEC 2010-C18 - Daily Orbit Update - see above