Contents  on 2 June '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 2 June '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 1924 UTC when the database was dated 2 June

NEOCP Activity  on 2 June '10

The MPC's NEO Confirmation Page has 15 listings: 9 new, 6 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine new and six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of sixteen listings on the NEOCP at some point today.

New MPECs  on 2 June '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-L09 - "12:38 UT" - 2008 HF2

<< DOU on 2 June '10 >>  MPEC 2010-L08 - "06:07 UT" - Daily Orbit Update

Observers  on 2 June '10

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 136617
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPEC 2010-L08 -- 2010 JK41, 2010 JH88, 2010 JE, 2010 GA34, 2010 EC135, 2010 DP, 2010 CL18, 2009 SO103, 2009 KD5, 2009 JO2, 2008 JV19, 2004 TB18, 2004 KH17, 2004 JX20, 2003 NZ6, 2002 YF4, 2000 HD74, 68216, 153814
160Castelmartini Obs. in Italy, 5 in MPEC 2010-L08 -- 2009 KD5, 2004 QY2, 2003 RN10, 241370, 218863
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2010-L08 -- 2010 KA8, 2009 UV18, 2003 RN10, 152889, 3551, 887
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-L08 -- 2010 GA34
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 136617
J75La Sagra Obs. in Spain, 1 in MPEC 2010-L08 -- 52750
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2010-L08 & 2010-L09 -- 2008 VK14, 2008 HF2
587Sormano Obs. in Italy, 3 in MPEC 2010-L08 -- 2010 JK41, 2010 JG88, 2010 JF88
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2010-L08 -- 2010 KP10, 2010 JK33, 2010 JE, 2010 GG7, 2006 XK2, 153814
H53Thompsonville Obs. in Illinois, 4 in MPEC 2010-L08 -- 54789, 12923, 3671, 1036
C51WISE in Earth polar orbit, 20 in MPEC 2010-L08 -- 2010 JG88, 2010 GZ6, 2010 GY6, 2010 EH43, 2010 AE, 2008 AB31, 2007 JZ20, 85804, 66272, 54401, 237551, 232382, 230118, 185716, 164121, 139289, 8566, 3752, 3554, 1036
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 June '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. Both also post impact solutions beyond 100 years for a few special 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
153814 2001 WN5NEODyS15262106-212255.16e-10-6.36-6.780NEODyS: "Based on 207 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/06/01.264."

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 2 June '10

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

1924Noted Radar Astrometry database update - see above
1526Noted that NEODyS has updated its 153814 2001 WN5 risk assessment - see above
Grabbed MPEC 2010-L08 - Daily Orbit Update - see above
Grabbed MPEC 2010-L09 - 2008 HF2 - see above