Contents  on 8 December '07


The latest news: framed access (best), RSS news feed RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 December '07

The MPC's NEO Confirmation Page has 10 listings: 5 new, 5 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and five updated listings. Of these, eight were "one nighters."

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 December '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 Dec. '07 >>  MPEC 2007-X38 - "07:10 UT" - Daily Orbit Update

Observers  on 8 December '07

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2007-X38 -- 2007 XN3, 2007 VX7, 2007 VO243, 2007 VD3, 2007 TX18
A81Balzaretto Obs. in Italy, 2 in MPEC 2007-X38 -- 66959, 143678
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-X38 -- 2007 VR183
J95Great Shefford Obs. in England, 3 in MPEC 2007-X38 -- 2007 XY9, 2007 XN3, 2007 XK11
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-X38 -- 2007 US6, 2003 BH84
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-X38 -- 99935
260&Rob Matson in California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2007-X38 -- 2007 TX18
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2007-X38 -- 2007 GS3, 2006 WY2, 2004 XP164
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2007-X38 -- 2007 XQ3
A48Verona Obs. in Italy, 4 in MPEC 2007-X38 -- 2007 WV4, 2007 WF55, 2007 WE55, 2007 SE11

Impact Risk Monitoring  on 8 December '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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 now 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 XK11JPL Sentry14492019-2106511.8e-07-3.85-4.450JPL: "Analysis based on 27 observations spanning 1.8235 days (2007-Dec-06.0886 to 2007-Dec-07.91211)." Diameter approximately 0.554 km. from mean, weighted H=18.9.
NEODyS14492019-208594.66e-08-4.34-4.600NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2007/12/06.089 to 2007/12/07.913."
2007 XP3NEODyS14492026-208981.42e-09-4.95-5.340NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2007/12/04.383 to 2007/12/05.429."

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 December '07

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

1449Noted that JPL Sentry has updated its 2007 XK11 risk assessment - see above
Noted that NEODyS has posted 2007 XK11 as an impact risk - see above
Noted that NEODyS has posted 2007 XP3 as an impact risk - see above
Grabbed MPEC 2007-X38 - Daily Orbit Update - see above