Contents  on 1 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 1 January '10

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on December 27th.

New MPECs  on 1 January '10

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 1 Jan. '10 >>  MPEC 2010-A01 - "07:09 UT" - Daily Orbit Update

Observers  on 1 January '10

Five observing facilities appear in today's MPEC.

CodeObserver / observatory
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2010-A01 -- 2009 QE8
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2010-A01 -- 17274
B19Iluro Obs. in Spain, 5 in MPEC 2010-A01 -- 2006 UR, 2005 MC, 159402, 5131, 1627
900Moriyama Obs. in Japan, 1 in MPEC 2010-A01 -- 2009 XO
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2010-A01 -- 2005 MC, 5131
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 January '10

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 XOJPL Sentry16172038-204522.9e-07-4.02-4.230JPL: "Analysis based on 125 observations spanning 20.517 days (2009-Dec-09.152 to 2009-Dec-29.66871)." Diameter approximately 0.300 km. from mean, weighted H=20.2.
NEODyS16172038-204522.91e-07-4.03-4.240NEODyS: "Based on 125 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2009/12/29.669."

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 1 January '10

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

1617Noted 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-A01 - Daily Orbit Update - see above