Contents  on 7 November '08


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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 7 November '08

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked today, the Minor Planet Center's NEO discovery Confirmation Page was unavailable. Yesterday it had one new and six updated listings. Of these, six were "one nighters." The Tracking News counted a total of eleven objects listed on the NEOCP at some point on this day.

New MPECs  on 7 November '08

Minor Planet Electronic Circulars

There were five MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-V41 - "19:58 UT" - 2000 YN30

MPEC 2008-V40 - "16:51 UT" - 2008 VS4

MPEC 2008-V39 - "16:47 UT" - 2008 VR4

MPEC 2008-V38 - "16:44 UT" - 2008 VQ4

<< DOU on 7 Nov. '08 >>  MPEC 2008-V37 - "07:17 UT" - Daily Orbit Update

Observers  on 7 November '08

Twelve observing facilities appeared in this day's MPECs.

CodeObserver / observatory
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-V37 -- 2001 UY4
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2008-V37 & 2008-V39 -- 2008 VR4, 2008 QD1, 2004 TL19, 2003 WX25, 2003 SG170, 1996 TE9, 189700, 189062, 138852, 137032, 13651
G92Jarnac Obs. in Arizona, 1 in MPEC 2008-V37 -- 2008 NU
704LINEAR in New Mexico, 7 in MPECs 2008-V37 & 2008-V38 -- 2008 VQ4, 2008 SQ, 2008 MR1, 2005 WS55, 2005 WJ56, 2005 TZ51, 3200
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2008-V38, 2008-V39 & 2008-V40 -- 2008 VS4, 2008 VR4, 2008 VQ4
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2008-V37 -- 2008 MZ, 2001 WJ2, 162900, 155110
118Modra Obs. in Slovakia, 1 in MPEC 2008-V37 -- 2008 UW5
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-V37, 2008-V38 & 2008-V40 -- 2008 VS4, 2008 VQ4, 2008 VJ, 2008 UZ91, 2008 UU95, 2008 UU5, 2008 UT5, 2008 UA7, 2008 TE157, 159929, 154991
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-V37 -- 1865
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-V38 -- 2008 VQ4
691Spacewatch 0.9m telescope in Arizona, 10 in MPECs 2008-V37 & 2008-V41 -- 2008 TD2, 2007 JJ35, 2007 EM88, 2007 DM41, 2006 SU19, 2001 VG5, 2000 YN30, 22753, 162900, 2212
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-V37 & 2008-V38 -- 2008 VZ3, 2008 VQ4, 2008 UW99, 2008 UW91, 2008 UU99, 2008 UT99, 2008 UO90, 2003 YX1, 163051
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 VS4JPL Sentry23582011-21063449.1e-07-5.28-6.120JPL: "Analysis based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963)." Diameter approximately 0.048 km. from mean, weighted H=24.2.
2008 VB4NEODyS12302011-20691163.65e-08-8.43-9.030NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/11/06.345 to 2008/11/06.458."
JPL Sentry05052012-2106213.1e-07-7.71-8.180JPL: "Analysis based on 12 observations spanning .11318 days (2008-Nov-06.34423 to 2008-Nov-06.45741)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
2008 VZ3JPL Sentry1230R E M O V E DJPL #2 for the day: Risk listing removed at 1051 UTC.
2008 UW99JPL Sentry1230R E M O V E DJPL: Risk listing removed at 1051 UTC.
2008 UU95JPL Sentry12302062-208544.9e-09-7.52-7.620JPL: "Analysis based on 31 observations spanning 6.9105 days (2008-Oct-30.37925 to 2008-Nov-06.28973)." Diameter approximately 0.072 km. from mean, weighted H=23.4.

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 7 November '08

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

0758 11/9Grabbed MPEC 2008-V38 - 2008 VQ4 - see above
Grabbed MPEC 2008-V39 - 2008 VR4 - see above
Grabbed MPEC 2008-V40 - 2008 VS4 - see above
Grabbed MPEC 2008-V41 - 2000 YN30 - see above
2358Noted that JPL Sentry has posted 2008 VS4 as an impact risk - see above
1230Noted that JPL Sentry has updated its 2008 UU95 risk assessment - see above
Noted that JPL Sentry has removed 2008 UW99 as an impact risk - see above
Noted that NEODyS has posted 2008 VB4 as an impact risk - see above
Noted that JPL Sentry has removed 2008 VZ3 as an impact risk - see above
Grabbed MPEC 2008-V37 - Daily Orbit Update - see above
0505Noted that JPL Sentry has posted 2008 VB4 as an impact risk - see above
0106Noted that JPL Sentry has posted 2008 VZ3 as an impact risk - see above