Contents  on 22 November '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 22 November '07

The MPC's NEO Confirmation Page has 10 listings: 7 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven new and three updated listings. Of these, nine 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 22 November '07

Minor Planet Electronic Circulars

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

MPEC 2007-W60 - "17:44 UT" - 2005 BE2

<< DOU on 22 Nov. '07 >>  MPEC 2007-W59 - "07:06 UT" - Daily Orbit Update

MPEC 2007-W58 - "03:39 UT" - PHAs

MPEC 2007-W57 - "03:39 UT" - Unusual Minor Planets

MPEC 2007-W56 - "03:39 UT" - Amors

MPEC 2007-W55 - "03:39 UT" - Atens and Apollos

MPEC 2007-W54 - "03:33 UT" - Distant Minor Planets

MPEC 2007-W53 - "03:02 UT" - Observable Comets

Observers  on 22 November '07

Four observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-W60 -- 2005 BE2
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2007-W59 -- 87311, 12711, 11405, 11398, 8176
355Hadano Obs. in Japan, 6 in MPEC 2007-W59 -- 2007 VQ4, 2007 VD12, 2007 TG15, 2007 SP6, 2007 SE11, 2007 PU11
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-W59 -- 2007 VD12, 2007 SE11

Impact Risk Monitoring  on 22 November '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 WV4NEODyS15022010-20901834.84e-07-2.88-3.960NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/11/19.394 to 2007/11/21.419."
JPL Sentry03022021-21071775.7e-07-3.00-4.030JPL: "Analysis based on 12 observations spanning 2.0246 days (2007-Nov-19.39373 to 2007-Nov-21.41833)." Diameter approximately 0.485 km. from mean, weighted H=19.2.

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 22 November '07

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

1923Grabbed MPEC 2007-W60 - 2005 BE2 - see above
1501Noted that NEODyS has posted 2007 WV4 as an impact risk - see above
Grabbed MPEC 2007-W59 - Daily Orbit Update - see above
0558Grabbed MPEC 2007-W53 - Observable Comets - see above
Grabbed MPEC 2007-W54 - Distant Minor Planets - see above
Grabbed MPEC 2007-W55 - Atens and Apollos - see above
Grabbed MPEC 2007-W56 - Amors - see above
Grabbed MPEC 2007-W57 - Unusual Minor Planets - see above
Grabbed MPEC 2007-W58 - PHAs - see above
0302Noted that JPL Sentry has posted 2007 WV4 as an impact risk - see above