Contents  on 18 October '08


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 18 October '08

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 15th.

New MPECs  on 18 October '08

Minor Planet Electronic Circulars

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

MPEC 2008-U04 - "19:14 UT" - 2008 RP108

<< DOU on 18 Oct. '08 >>  MPEC 2008-U03 - "06:11 UT" - Daily Orbit Update

Observers  on 18 October '08

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPEC 2008-U03 -- 2008 TX3, 2008 TT26, 2008 TK9, 2008 TB4, 2008 SU1, 2008 SQ, 2008 SN1, 2008 SH82, 2008 JZ7, 2006 HD2
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-U04 -- 2008 RP108
448Desert Moon Obs. in New Mexico, 9 in MPEC 2008-U03 -- 2008 TV25, 2008 TF4, 2008 TC4, 2008 SR1, 2008 RE80, 2001 KO20, 2000 SP43, 190491, 4596
808El Leoncito Obs. in Argentina, 1 in MPEC 2008-U03 -- 189062
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-U03 -- 2008 TC4
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-U03 -- 190491
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2008-U03 -- 2008 SU1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-U04 -- 2008 RP108
A13Naef Obs. in Switzerland, 3 in MPEC 2008-U03 -- 2008 SQ, 65996, 162679
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-U03 -- 2008 SQ1, 2008 SE, 185851
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-U03 -- 189062
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2008-U03 & 2008-U04 -- 2008 RP108, 18109, 162215, 137044
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2008-U03 -- 2008 TF, 2008 TD27, 2008 TC4, 2008 TA1, 162039
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-U03 -- 16960
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 October '08

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 TD27NEODyS1453R E M O V E D-
JPL Sentry1453R 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 18 October '08

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

1939Grabbed MPEC 2008-U04 - 2008 RP108 - see above
1454Grabbed MPEC 2008-U03 - Daily Orbit Update - see above
1453Noted that JPL Sentry has removed 2008 TD27 as an impact risk - see above
Noted that NEODyS has removed 2008 TD27 as an impact risk - see above