Contents  on 31 October '09


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 31 October '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on October 29th.

New MPECs  on 31 October '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 31 Oct. '09 >>  MPEC 2009-U140 - "06:10 UT" - Daily Orbit Update

MPEC 2009-U139 - "01:13 UT" - 2009 UW87

Observers  on 31 October '09

Ten observing facilities appear in today's MPECs.

CodeObserver / observatory
160Castelmartini Obs. in Italy, 1 in MPEC 2009-U140 -- 2009 SV171
J19El Maestrat Obs. in Spain, 2 in MPEC 2009-U140 -- 35396, 5646
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-U140 -- 2009 TK12
J75La Sagra Obs. in Spain, 2 in MPEC 2009-U140 -- 1999 YC, 1999 HY1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-U140 -- 2009 UV18
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-U140 -- 2009 UZ87
204Schiaparelli Obs. in Italy, 5 in MPEC 2009-U140 -- 2009 UL28, 2009 UK28, 2009 UF, 2009 UE19, 2009 TO8
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-U140 -- 2009 UZ17, 2009 UY17, 2009 UX19, 2009 UN3, 2009 HD21, 2009 FV4
I19Tanti Obs. in Argentina, 1 in MPEC 2009-U140 -- 86326
926Tenagra II Obs. in Arizona, 19 in MPECs 2009-U139 & 2009-U140 -- 2009 UZ87, 2009 UZ19, 2009 UY87, 2009 UY19, 2009 UX87, 2009 UX17, 2009 UW87, 2009 UW18, 2009 UV87, 2009 UU87, 2009 UM3, 2009 UM, 2009 UL28, 2009 UK14, 2009 UH14, 2009 UE19, 2009 UD19, 2009 TG8, 2009 SL104
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 October '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 UN3NEODyS1544R 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 31 October '09

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

1544Noted that NEODyS has removed 2009 UN3 as an impact risk - see above
Grabbed MPEC 2009-U140 - Daily Orbit Update - see above
0435Grabbed MPEC 2009-U139 - 2009 UW87 - see above