Contents  on 2 August '09


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 2 August '09

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of ten listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 2 August '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-P05 - "15:11 UT" - 2007 RQ17

<< DOU on 2 Aug. '09 >>  MPEC 2009-P04 - "06:08 UT" - Daily Orbit Update

Observers  on 2 August '09

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
I08Alianza S4 Obs. in Argentina, 1 in MPEC 2009-P04 -- 2009 OO9
J51Atlante Obs. in the Canary Islands, 4 in MPEC 2009-P04 -- 2009 NH, 2009 NE, 2002 LV, 1943
160Castelmartini Obs. in Italy, 4 in MPEC 2009-P04 -- 2009 OC, 2009 NL, 2009 NH, 2009 MX6
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-P04 -- 4034
I21El Condor Obs. in Argentina, 5 in MPEC 2009-P04 -- 2009 MC9, 2009 HV77, 24761, 17274, 5626
151Eschenberg Obs. in Switzerland, 4 in MPEC 2009-P04 -- 2009 NE, 2005 SN25, 163051, 11500
F655program code 5 via Faulkes Telescope North in Hawaii, 2 in MPEC 2009-P04 -- 2005 SN25, 2002 NP1
J95Great Shefford Obs. in England, 2 in MPEC 2009-P04 -- 2009 NL, 2001 AA50
704LINEAR in New Mexico, 3 in MPEC 2009-P04 -- 2009 LX, 17511, 433
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2009-P04 -- 2009 OW6, 2008 OX2, 2005 VP118, 2005 TU45
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-P04 -- 17274, 433
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-P04 & 2009-P05 -- 2007 RQ17, 24761, 20826
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-P04 -- 161989, 153591
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-P04 -- 2009 OW6, 2004 KF15
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-P04 -- 2002 LV, 433
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 August '09

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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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
2009 OW6JPL Sentry1434208014.7e-06-5.77-5.770JPL: "Analysis based on 51 observations spanning 5.1894 days (2009-Jul-27.36058 to 2009-Aug-01.550023)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
NEODyS1434208018.25e-06-5.52-5.520NEODyS: "Based on 52 optical observations (of which 2 are rejected as outliers) from 2009/07/27.361 to 2009/08/01.551."

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 August '09

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

1727Grabbed MPEC 2009-P05 - 2007 RQ17 - see above
1434Noted that JPL Sentry has updated its 2009 OW6 risk assessment - see above
Noted that NEODyS has updated its 2009 OW6 risk assessment - see above
Grabbed MPEC 2009-P04 - Daily Orbit Update - see above