Contents  on 23 July '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 23 July '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. So far The Tracking News has counted a total of three 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 23 July '09

Minor Planet Electronic Circulars

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

<< DOU on 23 July '09 >>  MPEC 2009-O26 - "06:07 UT" - Daily Orbit Update

Observers  on 23 July '09

Ten observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-O26 -- 2009 KC7
J05Bootes Obs., 2 in MPEC 2009-O26 -- 11500, 9162
127Bornheim Obs. in Germany, 5 in MPEC 2009-O26 -- 2008 WL60, 2002 LV, 15745, 5693, 5011
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-O26 -- 2009 KJ22, 162483
J95Great Shefford Obs. in England, 1 in MPEC 2009-O26 -- 2009 OF
130Lumezzane Obs. in Italy, 10 in MPEC 2009-O26 -- 2009 NJ, 2009 NA, 2005 SN25, 2002 YQ5, 2002 LV, 54401, 163758, 163051, 15745, 8035
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2009-O26 -- 2009 NL, 2009 NH, 2009 NE, 2009 KJ22, 2005 MC, 2002 LV
204Schiaparelli Obs. in Italy, 2 in MPEC 2009-O26 -- 2009 NA, 2002 YQ5
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-O26 -- 2009 KD5, 2006 TU7, 2004 VA15
J08Zonalunar Obs. in Spain, 1 in MPEC 2009-O26 -- 2009 OF
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 July '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 OFJPL Sentry1300203911.8e-06-3.72-3.720JPL: "Analysis based on 71 observations spanning 5.7140 days (2009-Jul-17.21281 to 2009-Jul-22.92683)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
NEODyS1300203912.31e-06-3.62-3.620NEODyS: "Based on 71 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/22.928."

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 23 July '09

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

1300Noted that JPL Sentry has updated its 2009 OF risk assessment - see above
Noted that NEODyS has updated its 2009 OF risk assessment - see above
Grabbed MPEC 2009-O26 - Daily Orbit Update - see above