Contents  on 2 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 2 December '07

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing.

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 2 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 2 Dec. '07 >>  MPEC 2007-X07 - "07:09 UT" - Daily Orbit Update

Observers  on 2 December '07

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 14 in MPEC 2007-X07 -- 2007 WV4, 2007 WP3, 2007 WB5, 2007 VN243, 2007 VM243, 2007 VK184, 2007 VH186, 2007 VH184, 2007 VG189, 2007 UW3, 2007 US12, 2007 UP6, 2007 UB6, 2007 TK8
J95Great Shefford Obs. in England, 2 in MPEC 2007-X07 -- 2007 WF55, 2007 WE55
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2007-X07 -- 2007 US6, 2007 PU11, 2003 BH84
B15Inastars Obs. in Germany, 2 in MPEC 2007-X07 -- 153201, 138947
130Lumezzane Obs. in Italy, 1 in MPEC 2007-X07 -- 2007 VA85
A06Mataro Obs. in Spain, 2 in MPEC 2007-X07 -- 2007 WF55, 2003 BH84
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2007-X07 -- 2007 VR183, 2007 PU11
941Pla D'Arguines Obs. in Spain, 2 in MPEC 2007-X07 -- 2007 WZ4, 2007 TK8
B40Skylive Obs. in Italy, 1 in MPEC 2007-X07 -- 2007 WF55
A78Stia Obs. in Italy, 5 in MPEC 2007-X07 -- 2007 WV4, 2007 VW137, 2005 YW55, 170903, 170891

Impact Risk Monitoring  on 2 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 WP3JPL Sentry15092104-2106105.6e-06-4.82-5.320JPL: "Analysis based on 47 observations spanning 9.9983 days (2007-Nov-18.26457 to 2007-Nov-28.262845)." Diameter approximately 0.066 km. from mean, weighted H=23.6.
2007 VN243JPL Sentry1509R E M O V E DJPL: Risk listing removed at 1252 UTC.
2007 VK184JPL Sentry15092046-2062175.8e-05-2.64-2.840JPL: "Analysis based on 71 observations spanning 16.024 days (2007-Nov-12.13904 to 2007-Nov-28.163092)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
NEODyS15092041-2074245.8e-05-2.64-2.850NEODyS: "Based on 71 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/11/28.164."

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 2 December '07

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

1509Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
Noted that NEODyS has updated its 2007 VK184 risk assessment - see above
Noted that JPL Sentry has removed 2007 VN243 as an impact risk - see above
Noted that NEODyS has removed 2007 VN243 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 WP3 risk assessment - see above
Grabbed MPEC 2007-X07 - Daily Orbit Update - see above