Contents  on 21 August '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 21 August '08

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

When last checked at 2359 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 21 August '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-Q14 - "21:35 UT" - 2008 QC

<< DOU on 21 Aug. '08 >>  MPEC 2008-Q13 - "06:08 UT" - Daily Orbit Update

Observers  on 21 August '08

Eight observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2008-Q13 -- 2008 NB, 2008 MR1, 2003 FQ6, 2000 PQ9, 52761, 31221, 137175
A81Balzaretto Obs. in Italy, 2 in MPEC 2008-Q13 -- 2008 ON, 4179
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-Q14 -- 2008 QC
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-Q13 -- 2008 ON13
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2008-Q13 & 2008-Q14 -- 2008 QC, 152679
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-Q13 -- 2006 TC1, 2201
H67Stonegate Obs. in Michigan, 1 in MPEC 2008-Q13 -- 164400
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2008-Q13 -- 8567, 1917
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 August '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 ON13JPL Sentry1516R E M O V E DJPL: Risk listing removed at 0853 UTC.
NEODyS1516R E M O V E D-

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 21 August '08

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

2211Grabbed MPEC 2008-Q14 - 2008 QC - see above
1516Noted that JPL Sentry has removed 2008 ON13 as an impact risk - see above
Noted that NEODyS has removed 2008 ON13 as an impact risk - see above
Grabbed MPEC 2008-Q13 - Daily Orbit Update - see above