Contents  on 16 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 16 March '09

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of twelve 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 16 March '09

Minor Planet Electronic Circulars

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

MPEC 2009-F06 - "19:51 UT" - 2009 FA

MPEC 2009-F05 - "16:40 UT" - 2009 EH3

MPEC 2009-F04 - "16:37 UT" - 2009 EG3

MPEC 2009-F03 - "16:34 UT" - 2009 EF3

<< DOU on 16 Mar. '09 >>  MPEC 2009-F02 - "06:08 UT" - Daily Orbit Update

MPEC 2009-F01 - "02:42 UT" - 2009 DD45

Observers  on 16 March '09

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 25 in MPECs 2009-F02 & 2009-F03 -- 2009 EZ, 2009 EP2, 2009 EM1, 2009 EK1, 2009 EG1, 2009 EF3, 2009 DZ, 2009 DV42, 2009 DR36, 2009 DQ4, 2009 DL1, 2009 DK46, 2009 DG9, 2009 DF1, 2009 CW1, 2009 CT1, 2009 CB3, 2009 CA2, 2009 BL71, 2009 BD2, 2009 BB11, 2009 AM15, 2009 AH16, 2008 YS27, 2008 YR27
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2009-F02 & 2009-F06 -- 2009 FA, 2009 EG1, 2002 EZ2, 155336
J27El Guijo Obs. in Spain, 1 in MPEC 2009-F02 -- 68350
151Eschenberg Obs. in Switzerland, 1 in MPEC 2009-F06 -- 2009 FA
J95Great Shefford Obs. in England, 6 in MPECs 2009-F02, 2009-F03 & 2009-F05 -- 2009 ER, 2009 EQ2, 2009 EH3, 2009 EF3, 2009 EC1, 2009 DO111
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-F06 -- 2009 FA
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2009-F01 -- 2009 DD45
I36Los Campitos Obs. in Argentina, 1 in MPEC 2009-F02 -- 16834
E20Marsfield Obs., 1 in MPEC 2009-F01 -- 2009 DD45
118Modra Obs. in Slovakia, 1 in MPEC 2009-F06 -- 2009 FA
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2009-F02, 2009-F03, 2009-F04 & 2009-F05 -- 2009 EH3, 2009 EG3, 2009 EF3, 85275, 18109
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-F02 -- 2009 BC58
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-F06 -- 2009 FA
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-F02, 2009-F03 & 2009-F05 -- 2009 EH3, 2009 EG1, 2009 EF3
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-F03 -- 2009 EF3
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-F02 -- 2009 DD45, 2008 EY5, 194386, 5604
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-F02 & 2009-F03 -- 2009 EF3, 2007 EM88
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-F02, 2009-F03 & 2009-F04 -- 2009 EK1, 2009 EG3, 2009 EF3, 2009 EE1, 2009 DL46, 2009 DB1, 2009 DA45, 2009 CS5, 2009 CS, 2009 CR5, 2009 CN5, 2009 CB3, 2009 AM, 2008 YS27, 1998 YM4
6735Jim Young via Table Mtn. Obs. in southern California, 5 in MPECs 2009-F02, 2009-F03, 2009-F04 & 2009-F05 -- 2009 EH3, 2009 EG3, 2009 EF3, 2009 CZ, 2009 CQ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 March '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2229 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 EK1NEODyS1432R E M O V E D-
JPL Sentry1432R E M O V E DJPL: Risk listing removed at 0939 UTC.
2009 DO111JPL Sentry14322068-2108251.1e-04-3.19-3.500JPL: "Analysis based on 24 observations spanning 21.558 days (2009-Feb-22.33494 to 2009-Mar-15.89344)." Diameter approximately 0.096 km. from mean, weighted H=22.7.
NEODyS14322055-2087128.2e-07-5.17-5.510NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2009/02/22.336 to 2009/03/15.894."

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 16 March '09

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

2034Grabbed MPEC 2009-F06 - 2009 FA - see above
1732Grabbed MPEC 2009-F03 - 2009 EF3 - see above
Grabbed MPEC 2009-F04 - 2009 EG3 - see above
Grabbed MPEC 2009-F05 - 2009 EH3 - see above
1432Noted that JPL Sentry has updated its 2009 DO111 risk assessment - see above
Noted that NEODyS has posted 2009 DO111 as an impact risk - see above
Noted that JPL Sentry has removed 2009 EK1 as an impact risk - see above
Noted that NEODyS has removed 2009 EK1 as an impact risk - see above
Grabbed MPEC 2009-F02 - Daily Orbit Update - see above
0436Grabbed MPEC 2009-F01 - 2009 DD45 - see above