Contents  on 13 December '08


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 13 December '08

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 9th.

New MPECs  on 13 December '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 13 Dec. '08 >>  MPEC 2008-X82 - "07:05 UT" - Daily Orbit Update

Observers  on 13 December '08

Eight observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 36 in MPEC 2008-X82 -- 2008 XP2, 2008 XP, 2008 XO, 2008 XE2, 2008 XC1, 2008 XB2, 2008 XB1, 2008 XA2, 2008 WZ94, 2008 WL60, 2008 WL, 2008 WK96, 2008 WK60, 2008 WK, 2008 WH60, 2008 WD14, 2008 WB59, 2008 VN, 2008 VK14, 2008 VH14, 2008 UE7, 2008 UC95, 2008 SV7, 2008 SP7, 2008 RT26, 2008 NB, 2008 MZ, 2008 LW8, 2007 YZ, 2006 VB14, 2006 SZ217, 2005 XM4, 2004 XL14, 2003 UX34, 2001 FX9, 2000 OM
J27El Guijo Obs. in Spain, 1 in MPEC 2008-X82 -- 1994 AW1
J77Golden Hill Obs. in England, 1 in MPEC 2008-X82 -- 2008 XC1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-X82 -- 2008 XE3
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-X82 -- 2008 UE7, 2008 UC95, 2005 BC, 2001 FX9, 4179
204Schiaparelli Obs. in Italy, 7 in MPEC 2008-X82 -- 2008 XW2, 2008 XS, 2008 XM1, 2008 XA2, 2008 WE96, 2008 LW8, 2006 VB14
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-X82 -- 2008 XE3
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-X82 -- 2007 UW3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 December '08

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 XC1NEODyS2305208511.22e-07-6.46-6.460NEODyS: "Based on 139 optical observations (of which 1 are rejected as outliers) from 2008/12/03.369 to 2008/12/11.334."
JPL Sentry14562085-208821.3e-07-6.44-6.500JPL: "Analysis based on 138 observations spanning 7.9652 days (2008-Dec-03.36799 to 2008-Dec-11.3332)." Diameter approximately 0.063 km. from mean, weighted H=23.7.
2008 WK96JPL Sentry14562024-203126.4e-05-2.74-2.740JPL: "Analysis based on 34 observations spanning 10.892 days (2008-Nov-30.38762 to 2008-Dec-11.27913)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
NEODyS14562024-203126.26e-05-2.75-2.750NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/11/30.388 to 2008/12/11.280."

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 13 December '08

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

2305Noted that NEODyS has reposted 2008 XC1 as an impact risk - see above
1456Noted that JPL Sentry has updated its 2008 WK96 risk assessment - see above
Noted that NEODyS has updated its 2008 WK96 risk assessment - see above
Noted that JPL Sentry has updated its 2008 XC1 risk assessment - see above
Grabbed MPEC 2008-X82 - Daily Orbit Update - see above