The A/CC news pages will probably 
not update again until Sept. 30th.

These A/CC news pages will probably not update again until sometime Thursday, September 30th UTC. This is the first planned down time since we began publishing daily news of Solar System small objects more than eight and half years ago.

Contents  on 26 September '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 September '10

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2032 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. The Tracking News counted a total of three listings on the NEOCP at some point on this day.

New MPECs  on 26 September '10

Minor Planet Electronic Circulars

There was one MPEC posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 26 Sept. '10 >>  MPEC 2010-S49 - "06:06 UT" - Daily Orbit Update

Observers  on 26 September '10

Eight observing facilities appeared in this day's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPEC 2010-S49 -- 2010 SV3, 2010 SJ, 2010 SF, 2010 RP80, 2010 RC130, 2010 RB130, 2010 OC, 2010 LR68, 2005 WK4, 2003 YO3, 2002 FW5, 251346, 250706, 250697, 250577, 250162, 249615, 249595
300Bisei Spaceguard Center in Japan, 3 in MPEC 2010-S49 -- 250577, 249886, 249595
160Castelmartini Obs. in Italy, 2 in MPEC 2010-S49 -- 250706, 250620
448Desert Moon Obs. in New Mexico, 13 in MPEC 2010-S49 -- 2010 RS3, 2010 RQ30, 2010 RM42, 2010 RK43, 2010 RG137, 2010 QD2, 2007 EJ26, 2001 WT1, 88959, 163412, 153814, 152952, 139345
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-S49 -- 2010 LY63
932McCarthy Obs. in Connecticut, 2 in MPEC 2010-S49 -- 2010 RC130, 2010 MF1
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-S49 -- 250620
I15Wishing Star Obs. in Rhode Island, 4 in MPEC 2010-S49 -- 2010 RN80, 2010 RC130, 249886, 152952
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 September '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2032 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 WN5NEODyS1416R E M O V E D-

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 September '10

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

1416Noted that NEODyS has removed 153814 2001 WN5 as an impact risk - see above
Grabbed MPEC 2010-S49 - Daily Orbit Update - see above