Contents  on 7 February '09


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 '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of three objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 7 February '09

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 7 Feb. '09 >>  MPEC 2009-C63 - "07:07 UT" - Daily Orbit Update

Observers  on 7 February '09

Eight observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2009-C63 -- 2009 CZ2, 2009 BG58, 2009 BE58, 2009 BD77, 1996 BZ3
850Cordell-Lorenz Obs. in Tennessee, 3 in MPEC 2009-C63 -- 2009 CV, 2009 BL58, 2009 BE58
B60Deep Sky Obs. in Germany, 1 in MPEC 2009-C63 -- 1980
704LINEAR in New Mexico, 7 in MPEC 2009-C63 -- 2009 CS, 2009 BE58, 194386, 14402, 141052, 8566, 5332
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-C63 -- 2009 BM2
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-C63 -- 2009 CA2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-C63 -- 2009 CC3
G68Sierra Stars Obs. in northern California, 1 in MPEC 2009-C63 -- 2009 BP58
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 February '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL 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 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
2009 CC3JPL Sentry18582095-210444.0e-07-3.83-4.250JPL: "Analysis based on 33 observations spanning 2.0223 days (2009-Feb-04.62941 to 2009-Feb-06.65174)." Diameter approximately 0.540 km. from mean, weighted H=19.0.
NEODyS1828R E M O V E D-
2009 CA2NEODyS1828R E M O V E D-

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 '09

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

1858Noted that JPL Sentry has updated its 2009 CC3 risk assessment - see above
1828Noted that NEODyS has removed 2009 CA2 as an impact risk - see above
Noted that NEODyS has removed 2009 CC3 as an impact risk - see above
1758Grabbed MPEC 2009-C63 - Daily Orbit Update - see above