Contents  on 15 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 15 March '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of nine 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 by Birtwhistle et al. at Suno Observatory.

New MPECs  on 15 March '09

Minor Planet Electronic Circulars

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

MPEC 2009-E70 - "16:59 UT" - 2009 DO111

MPEC 2009-E69 - "16:16 UT" - Comet C/2009 E1 (Itagaki)

MPEC 2009-E68 - "12:07 UT" - Comet C/2009 E1 (Itagaki)

<< DOU on 15 Mar. '09 >>  MPEC 2009-E67 - "06:07 UT" - Daily Orbit Update

Observers  on 15 March '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2009-E68 -- C/2009 E1
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-E68 -- C/2009 E1
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-E70 -- 2009 DO111
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-E67 -- 2009 DV43
J95Great Shefford Obs. in England, 1 in MPEC 2009-E67 -- 2009 DR3
J28Jaen Obs. in Spain, 1 in MPEC 2009-E67 -- 10302
B90Malina River Obs., 3 in MPEC 2009-E67 -- 2008 YE29, 2007 BT2, 2006 WZ2
900Moriyama Obs. in Japan, 2 in MPECs 2009-E69 & 2009-E70 -- C/2009 E1, 2009 DO111
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E68 -- C/2009 E1
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E70 -- 2009 DO111
I20Rio Cuarto Obs. in Argentina, 1 in MPEC 2009-E67 -- 2009 EP2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-E68 -- C/2009 E1
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-E67 -- 2009 EP2, 2009 EO2, 2009 EM1, 2009 DR3, 2009 BD77, 2009 AM15
510Siegen Obs. in Germany, 1 in MPEC 2009-E67 -- 2009 DR3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-E70 -- 2009 DO111
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2009-E67 -- 2009 DS10, 2009 DC1, 2009 CT5, 2009 CS5, 2009 CR5, 2009 CR4, 2009 CA3, 2009 BK71, 2005 SN25
D94Takanezawa Obs. in Japan, 1 in MPECs 2009-E68 & 2009-E69 -- C/2009 E1
C42Xingming Obs. in China, 1 in MPEC 2009-E69 -- C/2009 E1
367Yatsuka Obs. in Japan, 1 in MPEC 2009-E69 -- C/2009 E1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 DO111JPL Sentry19012068-2108221.0e-04-3.21-3.490JPL: "Analysis based on 21 observations spanning 21.260 days (2009-Feb-22.33494 to 2009-Mar-15.59514)." Diameter approximately 0.097 km. from mean, weighted H=22.7.

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 15 March '09

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

1901Noted that JPL Sentry has posted 2009 DO111 as an impact risk - see above
1834Grabbed MPEC 2009-E69 - Comet C/2009 E1 (Itagaki) - see above
Grabbed MPEC 2009-E70 - 2009 DO111 - see above
1438Grabbed MPEC 2009-E67 - Daily Orbit Update - see above
Grabbed MPEC 2009-E68 - Comet C/2009 E1 (Itagaki) - see above