Contents  on 17 September '08


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 17 September '08

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

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two 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 17 September '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 17 Sept. '08 >>  MPEC 2008-S02 - "06:08 UT" - Daily Orbit Update

Observers  on 17 September '08

Four observing facilities appear in today's MPEC.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 3 in MPEC 2008-S02 -- 2004 SB56, 2003 GW, 188452
143Gnosca Obs. in Switzerland, 4 in MPEC 2008-S02 -- 2004 SB56, 189700, 164400, 4257
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-S02 -- 2003 GW, 16960, 164400
A13Naef Obs. in Switzerland, 1 in MPEC 2008-S02 -- 188452
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 September '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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
2006 CDJPL Sentry17592015-2094583.1e-08-5.30-5.970JPL: "Analysis based on 12 observations spanning 1.9971 days (2006-Feb-01.1555 to 2006-Feb-03.15263)." Diameter approximately 0.213 km. from mean, weighted H=21.0.

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 17 September '08

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

1759Noted that JPL Sentry has updated its 2006 CD risk assessment - see above
1456Grabbed MPEC 2008-S02 - Daily Orbit Update - see above