Contents  on 11 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 11 February '10

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and two updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of seven 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 11 February '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-C44 - "17:02 UT" - 2010 CR5

<< DOU on 11 Feb. '10 >>  MPEC 2010-C43 - "07:23 UT" - Daily Orbit Update

Observers  on 11 February '10

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2010-C43 -- 2009 UN3
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 2 in MPECs 2010-C43 & 2010-C44 -- 2010 CR5, 2005 ED318
160Castelmartini Obs. in Italy, 1 in MPEC 2010-C43 -- 54789
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2010-C43 -- 2002 NW16, 54789, 162038, 105141, 4015
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-C43 -- 2009 UN3
J95Great Shefford Obs. in England, 3 in MPEC 2010-C43 -- 2010 CK1, 2010 CJ1, 2010 CA
152Moletai Obs. in Lithuania, 1 in MPEC 2010-C43 -- 2010 BB3
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2010-C44 -- 2010 CR5
204Schiaparelli Obs. in Italy, 4 in MPEC 2010-C43 -- 2010 BB3, 2002 XY38, 54789, 159402
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2010-C43 & 2010-C44 -- 2010 CR5, 2009 YV6
C51WISE in Earth polar orbit, 2 in MPEC 2010-C43 -- 2008 EV5, 2002 YF4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 February '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 CR5JPL Sentry20002014-21092581.2e-06-3.98-4.730JPL: "Analysis based on 10 observations spanning 1.9544 days (2010-Feb-09.3273 to 2010-Feb-11.281673)." Diameter approximately 0.146 km. from mean, weighted H=21.8.
2010 CM1NEODyS14382023-205542.26e-10-9.22-9.570NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2010/02/09.283 to 2010/02/10.368."
2010 CJ1NEODyS1438R E M O V E D-
JPL Sentry1438R E M O V E DJPL: Risk listing removed at 1051 UTC.
2010 CAJPL Sentry1438202222.0e-05-3.83-3.830JPL: "Analysis based on 31 observations spanning 5.6454 days (2010-Feb-05.19638 to 2010-Feb-10.84177)." Diameter approximately 0.040 km. from mean, weighted H=24.7.
NEODyS14382022-206832.1e-05-3.82-3.820NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/10.843."

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 11 February '10

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

2000Noted that JPL Sentry has posted 2010 CR5 as an impact risk - see above
1720Grabbed MPEC 2010-C44 - 2010 CR5 - see above
1438Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Noted that NEODyS has updated its 2010 CA risk assessment - see above
Noted that JPL Sentry has removed 2010 CJ1 as an impact risk - see above
Noted that NEODyS has removed 2010 CJ1 as an impact risk - see above
Noted that NEODyS has posted 2010 CM1 as an impact risk - see above
Grabbed MPEC 2010-C43 - Daily Orbit Update - see above