Contents  on 3 January '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 3 January '10

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There was one listing noted earlier today.

New MPECs  on 3 January '10

Minor Planet Electronic Circulars

As of last check at 2341 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-A11 - "19:59 UT" - 2009 FT

<< DOU on 3 Jan. '10 >>  MPEC 2010-A10 - "07:09 UT" - Daily Orbit Update

Observers  on 3 January '10

Seven observing facilities appear in today's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 2 in MPEC 2010-A10 -- 36284, 12711
448Desert Moon Obs. in New Mexico, 12 in MPEC 2010-A10 -- 2009 XO, 2009 XF2, 2009 WO6, 2009 WC26, 2006 YY2, 2005 AT42, 2003 FJ1, 2003 BT47, 24761, 138893, 9950, 3552
J95Great Shefford Obs. in England, 1 in MPEC 2010-A10 -- 2008 YZ32
442Gualba Obs. in Spain, 1 in MPEC 2010-A10 -- 4015
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A11 -- 2009 FT
A13Naef Obs. in Switzerland, 2 in MPEC 2010-A10 -- 2005 YY93, 11398
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-A10 -- 2008 YZ32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 January '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2341 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 XOJPL Sentry1702203812.8e-07-4.03-4.030JPL: "Analysis based on 128 observations spanning 24.120 days (2009-Dec-09.152 to 2010-Jan-02.2724)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
NEODyS1702203812.72e-07-4.03-4.030NEODyS: "Based on 128 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/02.273."

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 3 January '10

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

2322Noted that the NEOCP has become empty
2203Noted that the NEOCP has become active
2000Grabbed MPEC 2010-A11 - 2009 FT - see above
1702Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has updated its 2009 XO risk assessment - see above
Grabbed MPEC 2010-A10 - Daily Orbit Update - see above