Contents  on 28 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 28 February '10

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings.

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 28 February '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-D93 - "21:57 UT" - 2007 MG

<< DOU on 28 Feb. '10 >>  MPEC 2010-D92 - "07:11 UT" - Daily Orbit Update

Observers  on 28 February '10

Eight observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2010-D92 -- 2004 BO41
J19El Maestrat Obs. in Spain, 1 in MPEC 2010-D92 -- 5131
F655David Asher in Northern Ireland via Faulkes Telescope North in Hawaii, 2 in MPEC 2010-D92 -- 2008 JG, 2004 TB18
704LINEAR in New Mexico, 2 in MPEC 2010-D92 -- 2009 UN3, 2004 XD50
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D93 -- 2007 MG
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-D92 -- 2010 DB34
B40Skylive Obs. in Italy, 1 in MPEC 2010-D92 -- 54789
C51WISE in Earth polar orbit, 1 in MPEC 2010-D92 -- 2001 HA4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 February '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
2010 CK19NEODyS22152081-208937.05e-07-7.94-8.140NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2010/02/14.334 to 2010/02/16.470."
2010 CANEODyS2213202215.5e-06-4.31-4.310NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/14.098."

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 28 February '10

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

2215Noted that NEODyS has updated its 2010 CK19 risk assessment - see above
2213Noted that NEODyS has updated its 2010 CA risk assessment - see above
2211Grabbed MPEC 2010-D93 - 2007 MG - see above
1607Grabbed MPEC 2010-D92 - Daily Orbit Update - see above