Contents  on 2 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 2 October '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 2 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-T04 - "12:10 UT" - 2006 WL3

MPEC 2009-T03 - "10:20 UT" - 2005 SP9

<< DOU on 2 Oct. '09 >>  MPEC 2009-T02 - "06:09 UT" - Daily Orbit Update

Observers  on 2 October '09

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2009-T02 -- 2009 ST103, 2009 SP171, 2009 SO98, 2009 SO103, 2009 SM103, 2009 SL104, 2009 SG18, 2009 SF2, 2009 SC229, 2009 SC100, 2009 SB100
160Castelmartini Obs. in Italy, 9 in MPEC 2009-T02 -- 2009 SM103, 2009 MC9, 2002 FB6, 2000 CO101, 54401, 17274, 16834, 162181, 12711
J95Great Shefford Obs. in England, 1 in MPEC 2009-T02 -- 2009 SC229
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-T02 -- 2000 CO101
118Modra Obs. in Slovakia, 1 in MPEC 2009-T02 -- 2009 SQ
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2009-T02 -- 2009 SX17, 217683, 143624
J47Nazaret Obs. in Spain, 1 in MPEC 2009-T02 -- 2009 ST19
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-T02 -- 2009 SW171, 2009 SK, 2009 RV1, 2004 TB18, 2004 LJ
926Tenagra II Obs. in Arizona, 2 in MPECs 2009-T03 & 2009-T04 -- 2006 WL3, 2005 SP9
A92Urseanu Obs. in Romania, 1 in MPEC 2009-T02 -- 159402
G56Walnut Creek Obs. in northern California, 1 in MPEC 2009-T02 -- 2009 SO103
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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 SC229NEODyS1521R E M O V E D-
JPL Sentry1521R E M O V E DJPL: Risk listing removed at 0849 UTC.
2009 SG18NEODyS1521R 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 2 October '09

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

1521Noted that JPL Sentry has removed 2009 SC229 as an impact risk - see above
Noted that NEODyS has removed 2009 SC229 as an impact risk - see above
Noted that NEODyS has removed 2009 SG18 as an impact risk - see above
Grabbed MPEC 2009-T02 - Daily Orbit Update - see above
Grabbed MPEC 2009-T03 - 2005 SP9 - see above
Grabbed MPEC 2009-T04 - 2006 WL3 - see above
0544Noted that the NEOCP has become active