Contents  on 25 December '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 25 December '10

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing.

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 25 December '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 25 Dec. '10 >>  MPEC 2010-Y25 - "07:10 UT" - Daily Orbit Update

Observers  on 25 December '10

Five observers appear in today's MPEC.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 2 in MPEC 2010-Y25 -- 2010 SD13, 2010 JL33
J95Great Shefford Obs. in England, 1 in MPEC 2010-Y25 -- 2010 TP54
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-Y25 -- 2010 JL33
291Spacewatch 1.8m telescope in Arizona, 16 in MPEC 2010-Y25 -- 2010 XZ72, 2010 XZ, 2010 XY72, 2010 XQ69, 2010 XK52, 2010 XJ3, 2010 XG11, 2010 XB24, 2010 XB11, 2010 WZ8, 2010 WY8, 2010 VZ, 2010 UK8, 2010 SO16, 2010 KH, 2005 UO157
C51WISE in Earth polar orbit, 5 in MPEC 2010-Y25 -- 2010 VZ, 2008 AT28, 89830, 249886, 244977
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 December '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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. Both also post impact solutions beyond 100 years for a few special 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 XQ69JPL Sentry1730R E M O V E DJPL: Risk listing removed at 1102 UTC.

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 25 December '10

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

1730Noted that JPL Sentry has removed 2010 XQ69 as an impact risk - see above
Grabbed MPEC 2010-Y25 - Daily Orbit Update - see above