Contents  on 26 December '10


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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 26 December '10

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." The Tracking News counted a total of six listings on the NEOCP at some point on this day.

New MPECs  on 26 December '10

Minor Planet Electronic Circulars

There were two MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-Y27 - "18:17 UT" - 2010 YD

<< DOU on 26 Dec. '10 >>  MPEC 2010-Y26 - "07:09 UT" - Daily Orbit Update

Observers  on 26 December '10

Eight observers appeared in this day's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 6 in MPEC 2010-Y26 -- 2010 XG3, 2010 XA24, 2010 WP8, 2010 TM3, 2010 NW117, 2010 LF86
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-Y26 -- 2010 XG3, 2010 WQ7, 2003 YT124, 2002 KL3
J95Great Shefford Obs. in England, 1 in MPEC 2010-Y27 -- 2010 YD
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2010-Y26 -- 2010 XX58, 2010 XP51
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2010-Y26 & 2010-Y27 -- 2010 YD, 2010 WJ, 2007 EM88, 2003 MJ4, 144922
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2010-Y26 -- 2010 XJ, 2010 NW117, 2010 LF86
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2010-Y26 -- 2010 XT45, 2010 XL69, 2010 XG3, 2010 XC11, 2010 VX39, 2010 TU5, 2010 KY127, 2006 OG15, 2001 CA32
I28Starhoo Obs. in Massachusetts, 1 in MPEC 2010-Y26 -- 5496
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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 YDJPL Sentry2000206411.7e-10-10.59-10.60JPL: "Analysis based on 16 observations spanning 1.0315 days (2010-Dec-25.37287 to 2010-Dec-26.40436)." Diameter approximately 0.017 km. from mean, weighted H=26.5.

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 26 December '10

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

2000Noted that JPL Sentry has posted 2010 YD as an impact risk - see above
1834Grabbed MPEC 2010-Y27 - 2010 YD - see above
1711Grabbed MPEC 2010-Y26 - Daily Orbit Update - see above