Contents  on 26 February '10


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 26 February '10

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

When last checked at 2328 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. So far The Tracking News has counted a total of four 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 26 February '10

Minor Planet Electronic Circulars

As of last check at 2328 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-D85 - "21:59 UT" - 2010 DM56

MPEC 2010-D84 - "14:20 UT" - 2007 EF

<< DOU on 26 Feb. '10 >>  MPEC 2010-D83 - "07:24 UT" - Daily Orbit Update

Observers  on 26 February '10

Nine observing facilities appear in today's MPECs.

CodeObserver / observatory
448Desert Moon Obs. in New Mexico, 1 in MPEC 2010-D83 -- 2010 CJ19
J95Great Shefford Obs. in England, 1 in MPEC 2010-D85 -- 2010 DM56
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-D83 -- 2010 CR1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2010-D83 -- 2009 UN3, 218863
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-D83 -- 2010 DP
204Schiaparelli Obs. in Italy, 6 in MPEC 2010-D83 -- 2010 DE2, 2010 CL18, 2010 CG19, 2008 JG, 1999 RC32, 1996 BA1
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2010-D83 -- 2010 DG1
926Tenagra II Obs. in Arizona, 5 in MPECs 2010-D83 & 2010-D84 -- 2010 DZ1, 2010 DW1, 2010 DE2, 2010 CM44, 2007 EF
C51WISE in Earth polar orbit, 4 in MPECs 2010-D83 & 2010-D85 -- 2010 DM56, 2008 EV5, 2002 NW16, 2000 WC67
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 February '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2328 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
2010 DG1NEODyS1419R E M O V E D-
JPL Sentry1419R E M O V E DJPL: Risk listing removed at 1051 UTC.

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 26 February '10

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

2219Grabbed MPEC 2010-D85 - 2010 DM56 - see above
1631Grabbed MPEC 2010-D84 - 2007 EF - see above
1419Noted that JPL Sentry has removed 2010 DG1 as an impact risk - see above
Noted that NEODyS has removed 2010 DG1 as an impact risk - see above
Grabbed MPEC 2010-D83 - Daily Orbit Update - see above