Contents  on 5 March '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 5 March '09

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. All of these were "one nighters."

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 5 March '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-E40 - "20:46 UT" - 2009 EW

<< DOU on 5 Mar. '09 >>  MPEC 2009-E39 - "07:08 UT" - Daily Orbit Update

Observers  on 5 March '09

Ten observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2009-E39 -- 2009 EA, 2009 DJ46
B84Cyclops Obs. in The Netherlands, 2 in MPEC 2009-E39 -- 2009 DR3, 2009 DQ4
J95Great Shefford Obs. in England, 2 in MPECs 2009-E39 & 2009-E40 -- 2009 EW, 2009 DD45
950.program code "." (23) via La Palma in the Canary Islands, 1 in MPEC 2009-E39 -- 2009 CA2
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-E39 -- 2009 DP4
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2009-E39 -- 2009 DR3, 2009 DE47, 2009 BA71, 2004 EU9
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-E39 -- 18882
691Spacewatch 0.9m telescope in Arizona, 13 in MPEC 2009-E39 -- 2009 EA, 2009 DA1, 2006 KT1, 2005 EG94, 2005 EF, 2004 BL11, 1998 YM4, 99935, 65706, 162011, 139622, 138325, 8566
611Starkenburg Obs. in Germany, 1 in MPEC 2009-E39 -- 2009 DD45
B01Taunus Obs. in Germany, 1 in MPEC 2009-E39 -- 2009 DM45
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 March '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 EWJPL Sentry23002064-2081125.5e-06-6.00-6.410JPL #2 for the day: "Analysis based on 33 observations spanning 3.5481 days (2009-Mar-02.29194 to 2009-Mar-05.840076)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS15192064-2089191.74e-05-5.51-5.610NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/03/02.293 to 2009/03/04.867."

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 5 March '09

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

2300Noted that JPL Sentry has updated its 2009 EW risk assessment - see above
2103Grabbed MPEC 2009-E40 - 2009 EW - see above
1519Noted that NEODyS has updated its 2009 EW risk assessment - see above
1518Noted that JPL Sentry has updated its 2009 EW risk assessment - see above
Grabbed MPEC 2009-E39 - Daily Orbit Update - see above