Contents  on 1 November '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 1 November '08

The MPC's NEO Confirmation Page has 15 listings: 9 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had nine new and six updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 20 objects listed on the NEOCP at some point today.

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

New MPECs  on 1 November '08

Minor Planet Electronic Circulars

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

<< DOU on 1 Nov. '08 >>  MPEC 2008-V01 - "06:16 UT" - Daily Orbit Update

Observers  on 1 November '08

Thirteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-V01 -- 2008 UT95, 2008 SH82
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-V01 -- 2008 US4
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-V01 -- 2008 UU95, 2008 TD2, 2008 SH82
J19El Maestrat Obs., 1 in MPEC 2008-V01 -- 1916
J95Great Shefford Obs. in England, 2 in MPEC 2008-V01 -- 2008 UW99, 2008 UT95
704LINEAR in New Mexico, 10 in MPEC 2008-V01 -- 2008 UL90, 2008 SX245, 2008 SE, 2007 RF5, 2004 TL19, 190166, 189700, 16834, 153306, 5011
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-V01 -- 2008 UB7
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2008-V01 -- 2008 TD1, 1999 RD32, 5731, 4450
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-V01 -- 2008 US4, 2008 SQ1, 2008 SE, 2008 MR1, 2006 SZ217
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2008-V01 -- 2008 UU1, 2008 UC, 2005 WD1, 35107
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-V01 -- 2005 YS165, 2002 VY94, 90075
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2008-V01 -- 2008 US2, 2008 UR2, 2008 UO90, 2008 UN3, 2008 UM3, 2008 UF, 2008 UB, 2005 AT42, 2003 JD13
H53Thompsonville Obs. in Illinois, 6 in MPEC 2008-V01 -- 2008 US4, 2008 SQ1, 2008 SE, 185851, 8567, 1980
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 November '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 UW99JPL Sentry1443207424.5e-08-7.26-7.510JPL: "Analysis based on 17 observations spanning .73582 days (2008-Oct-31.45784 to 2008-Nov-01.19366)." Diameter approximately 0.046 km. from mean, weighted H=24.4.
2008 UU95JPL Sentry14432011-21084771.3e-06-4.86-5.450JPL: "Analysis based on 18 observations spanning .85118 days (2008-Oct-30.37925 to 2008-Oct-31.23043)." Diameter approximately 0.066 km. from mean, weighted H=23.5.
NEODyS14432011-20902318.04e-07-5.29-6.250NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/10/30.380 to 2008/10/31.231."
2008 UT95JPL Sentry1443R E M O V E DJPL: Risk listing removed at 0951 UTC.
2008 UB7JPL Sentry14432044-2106375.0e-05-3.57-3.990JPL: "Analysis based on 48 observations spanning 4.8668 days (2008-Oct-26.25877 to 2008-Oct-31.12558)." Diameter approximately 0.060 km. from mean, weighted H=23.8.
NEODyS14432044-2089494.93e-05-3.58-3.990NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2008/10/26.260 to 2008/10/31.126."

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 1 November '08

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

1444Grabbed MPEC 2008-V01 - Daily Orbit Update - see above
1443Noted that JPL Sentry has updated its 2008 UB7 risk assessment - see above
Noted that NEODyS has updated its 2008 UB7 risk assessment - see above
Noted that JPL Sentry has removed 2008 UT95 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 UU95 risk assessment - see above
Noted that NEODyS has updated its 2008 UU95 risk assessment - see above
Noted that JPL Sentry has updated its 2008 UW99 risk assessment - see above