Contents  on 30 July '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 30 July '08

The MPC's NEO Confirmation Page has 18 listings: 6 new, 12 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and twelve updated listings. Of these, fourteen were "one nighters." So far The Tracking News has counted a total of 22 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 30 July '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-O52 - "15:04 UT" - 2008 OC6

MPEC 2008-O51 - "14:43 UT" - 2008 OB6

MPEC 2008-O50 - "14:41 UT" - 2008 OA6

<< DOU on 30 July '08 >>  MPEC 2008-O49 - "06:08 UT" - Daily Orbit Update

MPEC 2008-O48 - "03:36 UT" - 2006 SG369

Observers  on 30 July '08

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
705Apache Point Obs. in New Mexico, 1 in MPEC 2008-O48 -- 2006 SG369
H55Astronomical Research Obs. (ARO) in Illinois, 6 in MPECs 2008-O49, 2008-O50 & 2008-O51 -- 2008 OY2, 2008 OX2, 2008 OV2, 2008 OB6, 2008 OA6, 2006 AQ
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2008-O49 -- 96744, 90075, 162186, 2102, 1620
639Dresden Obs. in Germany, 1 in MPEC 2008-O49 -- 2008 MU1
J27El Guijo Obs. in Spain, 2 in MPEC 2008-O49 -- 2008 OX1, 8567
J95Great Shefford Obs. in England, 1 in MPEC 2008-O49 -- 2008 OY2
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-O49 -- 2008 OX1, 2005 RC34, 90403
704LINEAR in New Mexico, 1 in MPEC 2008-O49 -- 11398
304Las Campanas Obs. in Chile, 1 in MPEC 2008-O48 -- 2006 SG369
900Moriyama Obs. in Japan, 1 in MPEC 2008-O49 -- 2008 OX1
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2008-O49, 2008-O50, 2008-O51 & 2008-O52 -- 2008 OO, 2008 OM, 2008 OC6, 2008 OB6, 2008 OA6, 2008 NX, 2008 HO3, 2008 HE3, 2006 WO127, 2006 AQ, 85640, 162980, 2201, 1916
B38Santa Mama Obs. in Italy, 4 in MPEC 2008-O49 -- 2008 OX1, 90403, 35107, 174050
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-O49 -- 2008 NS1, 162900, 5751
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-O49, 2008-O50 & 2008-O51 -- 2008 OB6, 2008 OA6, 173689
A78Stia Obs. in Italy, 3 in MPEC 2008-O49 -- 2008 OO, 2008 MU1, 173689
H53Thompsonville Obs. in Illinois, 8 in MPEC 2008-O49 -- 35107, 188452, 11398, 8567, 7889, 7482, 4179, 1917
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 July '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 OY2JPL Sentry1447209111.4e-09-10.28-10.30JPL: "Analysis based on 27 observations spanning 1.2266 days (2008-Jul-28.73553 to 2008-Jul-29.96211)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2008 OX2NEODyS15242014-2090241.08e-07-3.88-4.200NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/07/28.426 to 2008/07/29.400."
JPL Sentry14472016-2108772.0e-07-4.12-4.320JPL: "Analysis based on 16 observations spanning .97399 days (2008-Jul-28.42552 to 2008-Jul-29.39951)." Diameter approximately 0.265 km. from mean, weighted H=20.5.
2008 OONEODyS15242062-208162.02e-07-4.05-4.380NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2008/07/26.093 to 2008/07/29.313."
JPL Sentry14472075-2108204.6e-07-3.74-4.310JPL: "Analysis based on 58 observations spanning 3.2197 days (2008-Jul-26.09211 to 2008-Jul-29.31183)." Diameter approximately 0.398 km. from mean, weighted H=19.7.

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 30 July '08

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

1524Noted that NEODyS has updated its 2008 OO risk assessment - see above
Noted that NEODyS has posted 2008 OX2 as an impact risk - see above
1506Grabbed MPEC 2008-O52 - 2008 OC6 - see above
1448Grabbed MPEC 2008-O49 - Daily Orbit Update - see above
1447Noted that JPL Sentry has updated its 2008 OO risk assessment - see above
Noted that JPL Sentry has updated its 2008 OX2 risk assessment - see above
Noted that JPL Sentry has updated its 2008 OY2 risk assessment - see above
Grabbed MPEC 2008-O50 - 2008 OA6 - see above
Grabbed MPEC 2008-O51 - 2008 OB6 - see above
0516Grabbed MPEC 2008-O48 - 2006 SG369 - see above