Contents  on 8 January '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 this year 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 8 January '08

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 8 January '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 Jan. '08 >>  MPEC 2008-A35 - "07:08 UT" - Daily Orbit Update

Observers  on 8 January '08

Six observing facilities appear in today's MPEC.

CodeObserver / observatory
493Calar Alto Obs. in Spain, 1 in MPEC 2008-A35 -- 2007 WD5
J95Great Shefford Obs. in England, 1 in MPEC 2008-A35 -- 2007 YQ56
B15Inastars Obs. in Germany, 3 in MPEC 2008-A35 -- 2007 TG15, 2003 BH84, 136793
J66Kinver Obs. in England, 1 in MPEC 2008-A35 -- 170903
711McDonald Obs. in Texas, 2 in MPEC 2008-A35 -- 2007 YB2, 2005 WJ56
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2008-A35 -- 96189

Impact Risk Monitoring  on 8 January '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks.
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
2007 YQ56JPL Sentry15272027-2106191.9e-07-4.10-4.350JPL: "Analysis based on 51 observations spanning 7.7433 days (2007-Dec-31.14551 to 2008-Jan-07.88879)." Diameter approximately 0.352 km. from mean, weighted H=19.9.
NEODyS15272052-2089251.18e-07-4.49-4.930NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2007/12/31.146 to 2008/01/07.890."

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 8 January '08

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

1641The NEOCP has become active
1527Noted that JPL Sentry has updated its 2007 YQ56 risk assessment - see above
Noted that NEODyS has updated its 2007 YQ56 risk assessment - see above
Grabbed MPEC 2008-A35 - Daily Orbit Update - see above
0413The NEOCP has become empty