Contents  on 12 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 12 February '10

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, two were "one nighters."

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 12 February '10

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-C47 - "13:26 UT" - 2002 CY58

<< DOU on 12 Feb. '10 >>  MPEC 2010-C46 - "07:22 UT" - Daily Orbit Update

MPEC 2010-C45 - "05:10 UT" - 2009 DE47

Observers  on 12 February '10

Six observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 3 in MPEC 2010-C46 -- 2010 CJ1, 2010 CA, 153814
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2010-C46 -- 2010 CK1, 2009 UN3
E20Marsfield Obs. in New South Wales, 1 in MPEC 2010-C46 -- 2009 UN3
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2010-C46 -- 2010 CT, 2010 CR1, 2010 CN1, 1980
926Tenagra II Obs. in Arizona, 2 in MPECs 2010-C45 & 2010-C47 -- 2009 DE47, 2002 CY58
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-C46 -- 2009 SV171
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 February '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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 CR5NEODyS15222014-2087815.16e-07-4.28-4.910NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2010/02/09.328 to 2010/02/11.282."
2010 CAJPL Sentry1522202222.4e-05-3.76-3.760JPL: "Analysis based on 38 observations spanning 5.8964 days (2010-Feb-05.19638 to 2010-Feb-11.092792)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
NEODyS1522202222.41e-05-3.76-3.760NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/11.094."

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 12 February '10

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

1522Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Noted that NEODyS has updated its 2010 CA risk assessment - see above
Noted that NEODyS has posted 2010 CR5 as an impact risk - see above
Grabbed MPEC 2010-C46 - Daily Orbit Update - see above
Grabbed MPEC 2010-C47 - 2002 CY58 - see above
0514Grabbed MPEC 2010-C45 - 2009 DE47 - see above