Contents  on 25 January '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.

Radar Astrometry  on 25 January '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2121 UTC when the database was dated 25 Jan.

NEOCP Activity  on 25 January '10

The MPC's NEO Confirmation Page has 6 listings: 4 new, 2 updated

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and two updated listings. Of these, four were "one nighters."

New MPECs  on 25 January '10

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-B41 - "21:58 UT" - Comet C/2009 O2 (Catalina)

MPEC 2010-B40 - "16:20 UT" - 2007 FE1

<< DOU on 25 Jan. '10 >>  MPEC 2010-B39 - "07:13 UT" - Daily Orbit Update

Observers  on 25 January '10

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2010-B41 -- C/2009 O2
160Castelmartini Obs. in Italy, 20 in MPEC 2010-B39 -- 2010 BG2, 2010 BC, 2010 AO60, 2010 AG40, 2007 UR3, 2003 BH, 2002 NW16, 99248, 96590, 85839, 35432, 24761, 20790, 163696, 162998, 137925, 10165, 4486, 4015, 1627
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-B39 -- 2010 AE, 2009 XR2, 2001 FO32, 229007
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2010 AF40
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2010 AF40
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2010-B39 -- 2010 BC, 2006 UR, 2005 MC, 2004 XD50, 86067
D95Kurihara Obs. in Japan, 1 in MPEC 2010-B39 -- 433
704LINEAR in New Mexico, 1 in MPEC 2010-B39 -- 5131
152Moletai Obs. in Lithuania, 1 in MPEC 2010-B39 -- 2010 BT3
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-B39 -- 2009 WM1
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2010-B39 -- 2010 AE, 2009 UN3, 2005 MC, 21088
587Sormano Obs. in Italy, 1 in MPEC 2010-B39 -- 2010 BU2
I19Tanti Obs. in Argentina, 3 in MPEC 2010-B39 -- 2010 BQ, 2010 BG2, 2010 BB3
926Tenagra II Obs. in Arizona, 7 in MPECs 2010-B39 & 2010-B40 -- 2010 BU2, 2010 BT3, 2010 BQ, 2010 BH2, 2010 BC3, 2010 BB3, 2007 FE1
C00Velikie Luki Obs. in Russia, 1 in MPEC 2010-B39 -- 86067
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 January '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2323 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 WM1NEODyS1521207813.99e-09-6.27-6.270NEODyS: "Based on 84 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2010/01/24.561."
JPL Sentry1502209119.3e-08-4.98-4.980JPL: "Analysis based on 84 observations spanning 68.097 days (2009-Nov-17.4641 to 2010-Jan-24.5607)." Diameter approximately 0.280 km. from mean, weighted H=20.4.

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 25 January '10

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

2323Grabbed MPEC 2010-B41 - Comet C/2009 O2 (Catalina) - see above
2121Noted Radar Astrometry database update - see above
1628Grabbed MPEC 2010-B40 - 2007 FE1 - see above
1521Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
1502Noted that JPL Sentry has updated its 2009 WM1 risk assessment - see above
Grabbed MPEC 2010-B39 - Daily Orbit Update - see above