Contents  on 6 September '08

Note: These A/CC news pages will update less often and at irregular intervals through Wednesday, September 10th.


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 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 6 September '08

The MPC's NEO Confirmation Page has 15 listings: 2 new, 13 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and thirteen updated listings. Of these, eleven were "one nighters."

New MPECs  on 6 September '08

Minor Planet Electronic Circulars

As of last check at 2356 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 6 Sept. '08 >>  MPEC 2008-R31 - "06:08 UT" - Daily Orbit Update

Observers  on 6 September '08

Eleven observing facilities appear in today's MPEC.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-R31 -- 105140
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-R31 -- 2000 CO101, 162149
585Kiev Comet Station in the Ukraine, 2 in MPEC 2008-R31 -- 16960, 8567
704LINEAR in New Mexico, 13 in MPEC 2008-R31 -- 2008 MR1, 2006 WZ2, 2000 FJ10, 1998 SO, 66063, 190135, 8567, 6611, 5731, 5143, 4183, 1916, 1865
J75La Sagra Obs. in Spain, 1 in MPEC 2008-R31 -- 96744
474Mt. John Obs. in New Zealand, 3 in MPEC 2008-R31 -- 2008 RW, 2008 RV, 2008 QS11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2008-R31 -- 2005 TZ51, 2003 RM, 1998 SD9, 90403, 66008, 65690, 190135, 189700, 164400, 8567
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-R31 -- 2008 EZ97
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-R31 -- 2008 QZ, 2008 OQ8, 88188
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2008-R31 -- 2008 QZ, 2008 KV28, 1999 RJ27
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2008-R31 -- 66146
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 September '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2356 and JPL at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
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
2008 RJ1NEODyS13482010-2086395.28e-09-3.85-4.180NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/09/04.405 to 2008/09/05.440."
2008 RH1NEODyS13482016-2089191.42e-07-5.24-5.460NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/09/04.350 to 2008/09/05.350."
2008 RG1NEODyS13482013-2090991.2e-07-4.36-5.110NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/09/04.264 to 2008/09/05.415."
2008 RVJPL Sentry1348R E M O V E DJPL: Risk listing removed at 0850 UTC.

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 6 September '08

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

1348Noted that NEODyS has posted 2008 RG1 as an impact risk - see above
Noted that NEODyS has posted 2008 RH1 as an impact risk - see above
Noted that NEODyS has posted 2008 RJ1 as an impact risk - see above
Noted that JPL Sentry has removed 2008 RV as an impact risk - see above
Grabbed MPEC 2008-R31 - Daily Orbit Update - see above