Contents  on 31 July '08

Resources:

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 31 July '08

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings. Of these, two 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 31 July '08

Minor Planet Electronic Circulars

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


MPEC 2008-O67 - "21:50 UT" - Comet C/2008 O1 (SOHO)


MPEC 2008-O66 - "20:14 UT" - 2008 OS9


MPEC 2008-O65 - "17:24 UT" - 2008 OC9


MPEC 2008-O64 - "16:41 UT" - 2008 OB9


MPEC 2008-O63 - "15:11 UT" - 2008 OX8


MPEC 2008-O62 - "12:00 UT" - 2008 OQ8


MPEC 2008-O61 - "11:55 UT" - 2008 OP8


MPEC 2008-O60 - "11:52 UT" - 2008 OO8


MPEC 2008-O59 - "11:49 UT" - 2008 ON8


MPEC 2008-O58 - "11:47 UT" - 2008 OM8


<< DOU on 31 July '08 >>  MPEC 2008-O57 - "06:08 UT" - Daily Orbit Update


MPEC 2008-O56 - "01:35 UT" - 2008 OT7


MPEC 2008-O55 - "01:25 UT" - 2008 OS7


MPEC 2008-O54 - "01:19 UT" - 2007 TE66


MPEC 2008-O53 - "00:39 UT" - 2006 AR2

Observers  on 31 July '08

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 3 in MPEC 2008-O57 -- 173689, 8567, 4257
H55Astronomical Research Obs. (ARO) in Illinois, 9 in MPECs 2008-O53, 2008-O54 & 2008-O57 -- 2008 OO, 2008 OM, 2008 MU1, 2008 KV28, 2008 HO3, 2007 TE66, 2006 AR2, 2006 AQ, 2005 QE30
069Baldone Obs. in Latvia, 1 in MPEC 2008-O66 -- 2008 OS9
170Begues Obs. in Spain, 1 in MPEC 2008-O57 -- 4179
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2008-O55, 2008-O57, 2008-O61 & 2008-O66 -- 2008 OS9, 2008 OS7, 2008 OP8, 7358, 4179
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-O57 -- 4257
J95Great Shefford Obs. in England, 4 in MPECs 2008-O55, 2008-O57, 2008-O58 & 2008-O61 -- 2008 OS7, 2008 OP8, 2008 OM8, 2008 OA6
E16Grove Creek Obs. in New South Wales, 2 in MPECs 2008-O55 & 2008-O56 -- 2008 OT7, 2008 OS7
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-O57 -- 2005 BC
900Moriyama Obs. in Japan, 3 in MPECs 2008-O55, 2008-O57 & 2008-O66 -- 2008 OX1, 2008 OS9, 2008 OS7
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2008-O57, 2008-O58, 2008-O59, 2008-O60, 2008-O61, 2008-O62 & 2008-O64 -- 2008 OQ8, 2008 OP8, 2008 OO8, 2008 ON8, 2008 OM8, 2008 OB9, 2004 NL8, 4179, 2201
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-O57 -- 2008 OX1, 2008 MU1, 173689
H06.Cristovao Jacques in Brazil via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-O55 -- 2008 OS7
473Remanzacco Obs. in Italy, 1 in MPEC 2008-O58 -- 2008 OM8
E12Siding Spring Survey (SSS) in New South Wales, 8 in MPECs 2008-O56, 2008-O57, 2008-O63 & 2008-O65 -- 2008 OX8, 2008 OT7, 2008 OC9, 2008 NQ3, 2008 MH1, 21088, 102873, 5653
2493LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2008-O67 -- C/2008 O1
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-O57 -- 2008 OM, 106589
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2008 OB9JPL Sentry19222014-2106486.2e-08-3.03-3.620JPL: "Analysis based on 12 observations spanning 1.9078 days (2008-Jul-29.34054 to 2008-Jul-31.2483)." Diameter approximately 1.241 km. from mean, weighted H=17.2.
2008 OP8JPL Sentry15252035-209233.3e-10-6.24-6.610JPL: "Analysis based on 20 observations spanning .95670 days (2008-Jul-30.41557 to 2008-Jul-31.37227)." Diameter approximately 0.521 km. from mean, weighted H=19.1.
2008 OO8JPL Sentry15252021-2096172.4e-06-5.77-6.330JPL: "Analysis based on 15 observations spanning .91946 days (2008-Jul-30.37816 to 2008-Jul-31.29762)." Diameter approximately 0.030 km. from mean, weighted H=25.2.
2008 OT7JPL Sentry04332085-209832.0e-08-9.01-9.030JPL: "Analysis based on 19 observations spanning .14927 days (2008-Jul-30.62013 to 2008-Jul-30.7694)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2008 OS7NEODyS1352208719.36e-10-6.81-6.810NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/07/30.246 to 2008/07/30.964."
JPL Sentry03292069-2108106.8e-09-5.93-6.470JPL: "Analysis based on 26 observations spanning .71807 days (2008-Jul-30.245 to 2008-Jul-30.96307)." Diameter approximately 0.290 km. from mean, weighted H=20.3.
2008 OC6NEODyS20022011-2048159.99e-10-4.74-5.310NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/07/29.462 to 2008/07/30.484."
2008 OONEODyS13522075-208151.99e-07-4.08-4.430NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2008/07/26.093 to 2008/07/29.313."
JPL Sentry13512075-2108194.6e-07-3.76-4.360JPL: "Analysis based on 61 observations spanning 3.2197 days (2008-Jul-26.09211 to 2008-Jul-29.31183)." Diameter approximately 0.390 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 31 July '08

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

2209Grabbed MPEC 2008-O67 - Comet C/2008 O1 (SOHO) - see above
2022Grabbed MPEC 2008-O66 - 2008 OS9 - see above
2002Noted that NEODyS has posted 2008 OC6 as an impact risk - see above
1921Noted that JPL Sentry has posted 2008 OB9 as an impact risk - see above
1802Grabbed MPEC 2008-O65 - 2008 OC9 - see above
1706Grabbed MPEC 2008-O64 - 2008 OB9 - see above
1525Noted that JPL Sentry has posted 2008 OO8 as an impact risk - see above
Noted that JPL Sentry has posted 2008 OP8 as an impact risk - see above
Grabbed MPEC 2008-O63 - 2008 OX8 - see above
1352Noted that NEODyS has updated its 2008 OO risk assessment - see above
Grabbed MPEC 2008-O57 - Daily Orbit Update - see above
Grabbed MPEC 2008-O58 - 2008 OM8 - see above
Grabbed MPEC 2008-O59 - 2008 ON8 - see above
Grabbed MPEC 2008-O60 - 2008 OO8 - see above
Grabbed MPEC 2008-O61 - 2008 OP8 - see above
Grabbed MPEC 2008-O62 - 2008 OQ8 - see above
1351Noted that JPL Sentry has updated its 2008 OO risk assessment - see above
Noted that NEODyS has posted 2008 OS7 as an impact risk - see above
0433Noted that JPL Sentry has posted 2008 OT7 as an impact risk - see above
0329Noted that JPL Sentry has posted 2008 OS7 as an impact risk - see above
0159Grabbed MPEC 2008-O54 - 2007 TE66 - see above
Grabbed MPEC 2008-O55 - 2008 OS7 - see above
Grabbed MPEC 2008-O56 - 2008 OT7 - see above
0102Grabbed MPEC 2008-O53 - 2006 AR2 - see above