Contents  on 31 October '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 31 October '07

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2058 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of six objects listed on the NEOCP at some point today.

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 31 October '07

Minor Planet Electronic Circulars

As of last check at 2058 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-U97 - "19:12 UT" - 2007 UK40

<< DOU on 31 Oct. '07 >>  MPEC 2007-U96 - "06:09 UT" - Daily Orbit Update

MPEC 2007-U95 - "00:20 UT" - 2007 UQ13

Observers  on 31 October '07

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPEC 2007-U96 -- 2007 US3, 2007 UP6, 2007 UL12, 2007 UG6, 2007 UB6, 2007 UA2, 2007 TZ18, 2007 TY24, 2007 TL23, 2007 TE71, 2007 RZ8, 2007 RV9, 2007 RQ133, 2007 RP133, 1999 AQ10, 1996 TY11
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2007-U96 & 2007-U97 -- 2007 UK40, 2007 UG6, 2007 RU12, 2007 PU11
151Eschenberg Obs. in Switzerland, 1 in MPEC 2007-U97 -- 2007 UK40
J95Great Shefford Obs. in England, 1 in MPEC 2007-U95 -- 2007 UQ13
A17Guidestar Obs. in Germany, 1 in MPEC 2007-U96 -- 2007 US12
704LINEAR in New Mexico, 1 in MPEC 2007-U96 -- 2007 US6
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-U96 -- 2340
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2007-U95, 2007-U96 & 2007-U97 -- 2007 UQ13, 2007 UN12, 2007 UK40, 2007 RU17, 2003 WM7, 6489
J69North Obs. in England, 2 in MPEC 2007-U96 -- 2002 RC118, 99907
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2007-U96 -- 2007 TX18, 2007 TG8, 2007 TG15, 2007 RU12, 2007 RF5, 2007 PU11, 2007 LR32, 2004 KE1, 2002 UA31, 2002 RC118, 168044, 143678
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2007-U96 -- 2007 TV68, 2007 TK15, 2005 XL80
H53Thompsonville Obs., 6 in MPEC 2007-U96 -- 2007 TG15, 2007 RF5, 2007 PU11, 2007 LR32, 2002 UA31, 138883

Impact Risk Monitoring  on 31 October '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2058 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 UN12JPL Sentry13212069-2107282.2e-04-5.95-6.880JPL: "Analysis based on 66 observations spanning 9.0289 days (2007-Oct-21.37247 to 2007-Oct-30.40138)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
NEODyS13212069-2090215.8e-05-6.45-7.120NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2007/10/21.373 to 2007/10/30.402."
2007 UL12JPL Sentry1321209416.3e-09-5.87-5.870JPL: "Analysis based on 31 observations spanning 4.7738 days (2007-Oct-25.47694 to 2007-Oct-30.250706)." Diameter approximately 0.270 km. from mean, weighted H=20.5.

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 31 October '07

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

2058Grabbed MPEC 2007-U97 - 2007 UK40 - see above
1321Noted that NEODyS has updated its 2007 UN12 risk assessment - see above
Grabbed MPEC 2007-U96 - Daily Orbit Update - see above
1320Noted that JPL Sentry has updated its 2007 UL12 risk assessment - see above
Noted that JPL Sentry has updated its 2007 UN12 risk assessment - see above
0220Grabbed MPEC 2007-U95 - 2007 UQ13 - see above