Contents  on 29 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 29 October '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were three listings noted earlier today.

New MPECs  on 29 October '09

Minor Planet Electronic Circulars

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

MPEC 2009-U127 - "23:16 UT" - 2009 UV18 = 2004 CN97

MPEC 2009-U126 - "16:15 UT" - Comet C/2009 U6 (LINEAR)

<< DOU on 29 Oct. '09 >>  MPEC 2009-U125 - "06:11 UT" - Daily Orbit Update

Observers  on 29 October '09

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
J94Abbeydale Obs. in England, 1 in MPEC 2009-U125 -- 54401
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-U125 -- 2005 RQ6, 1999 HY1
160Castelmartini Obs. in Italy, 22 in MPEC 2009-U125 -- 2009 UO3, 2009 TK12, 2009 ST19, 2009 ST103, 2009 SM103, 2009 ML1, 2009 KC3, 54401, 22771, 217796, 20790, 17511, 17274, 16834, 162998, 159402, 143678, 136617, 12711, 6455, 3200, 433
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-U126 -- C/2009 U6
J95Great Shefford Obs. in England, 2 in MPEC 2009-U125 -- 2009 UY19, 2009 UU1
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2009-U125 -- 2009 TK8, 2002 NW16, 217796, 3552
704LINEAR in New Mexico, 1 in MPEC 2009-U126 -- C/2009 U6
J75La Sagra Obs. in Spain, 1 in MPEC 2009-U125 -- 2009 HV44
130Lumezzane Obs. in Italy, 5 in MPEC 2009-U125 -- 2009 SM103, 2009 RD4, 54660, 159402, 3988
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2009-U127 -- 2009 UV18
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2009-U125 -- 154244
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2009-U125 & 2009-U126 -- 2009 UV87, 2009 UK20, C/2009 U6, 2009 TB3, 2009 SG18
A78Stia Obs. in Italy, 3 in MPEC 2009-U125 -- 2009 UY19, 2009 TK8, 2009 HV44
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2009-U126 -- C/2009 U6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 UV87NEODyS1509R E M O V E D-
JPL Sentry1509R E M O V E DJPL: Risk listing removed at 0849 UTC.

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 29 October '09

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

2358Grabbed MPEC 2009-U127 - 2009 UV18 = 2004 CN97 - see above
1654Noted that the NEOCP has become empty
1638Grabbed MPEC 2009-U126 - Comet C/2009 U6 (LINEAR) - see above
1509Noted that JPL Sentry has removed 2009 UV87 as an impact risk - see above
Noted that NEODyS has removed 2009 UV87 as an impact risk - see above
Grabbed MPEC 2009-U125 - Daily Orbit Update - see above