Contents  on 13 August '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 13 August '08

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters."

New MPECs  on 13 August '08

Minor Planet Electronic Circulars

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


<< DOU on 13 Aug. '08 >>  MPEC 2008-P61 - "06:10 UT" - Daily Orbit Update

Observers  on 13 August '08

Sixteen observing facilities appear in today's MPEC.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-P61 -- 90403
H55Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2008-P61 -- 2008 PW4, 2008 PJ9, 2008 ON8, 2008 ON13, 2008 OC9, 2008 NX, 2008 NB, 2008 MH1, 2008 JT35, 2008 JR26, 2008 HO3
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14
808El Leoncito Obs. in Argentina, 8 in MPEC 2008-P61 -- 2008 OS9, 2008 BT18, 85839, 188452, 17182, 11398, 7482, 4179
J95Great Shefford Obs. in England, 4 in MPEC 2008-P61 -- 2008 PV16, 2008 PF1, 2008 OO, 2008 ON13
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-P61 -- 2008 ON10
699LONEOS in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14
J75La Sagra Obs. in Spain, 7 in MPEC 2008-P61 -- 2008 OS9, 2008 OO, 2007 VW137, 2004 NL8, 4179, 1866, 1620
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-P61 -- 2007 QX14
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2008-P61 -- 2007 QX14
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 1 in MPEC 2008-P61 -- 2007 QX14
B38Santa Mama Obs. in Italy, 4 in MPEC 2008-P61 -- 2001 TA45, 90403, 65690, 188452
E12Siding Spring Survey (SSS) in New South Wales, 12 in MPEC 2008-P61 -- 2008 PW4, 2008 PR9, 2008 PL3, 2008 PK3, 2008 PJ9, 2008 PJ3, 2008 PH3, 2008 PG2, 2008 OX8, 2007 QX14, 162510, 101873
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-P61 -- 2007 QX14, 1996 BZ3, 55408, 173689
H53Thompsonville Obs. in Illinois, 4 in MPEC 2008-P61 -- 2004 SB56, 90403, 39572, 188452
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-P61 -- 2008 PJ3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 August '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 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 PR9JPL Sentry1449R E M O V E DJPL: Risk listing removed at 0903 UTC.
NEODyS1449R E M O V E D-
2008 PJ9JPL Sentry1449207111.0e-08-6.52-6.520JPL: "Analysis based on 27 observations spanning 6.0495 days (2008-Aug-06.59348 to 2008-Aug-12.64301)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
NEODyS1449207111.29e-08-6.39-6.390NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/08/06.594 to 2008/08/12.644."
2008 ON13JPL Sentry1449208613.0e-09-5.75-5.750JPL: "Analysis based on 21 observations spanning 12.609 days (2008-Jul-31.39367 to 2008-Aug-13.00223)." Diameter approximately 0.380 km. from mean, weighted H=19.8.
NEODyS1449208615.15e-09-5.52-5.520NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/07/31.394 to 2008/08/13.003."
2008 OOJPL Sentry1449210016.6e-07-3.66-3.660JPL: "Analysis based on 85 observations spanning 17.857 days (2008-Jul-26.09211 to 2008-Aug-12.94893)." Diameter approximately 0.380 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 13 August '08

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

1449Noted that JPL Sentry has updated its 2008 ON13 risk assessment - see above
Noted that NEODyS has updated its 2008 ON13 risk assessment - see above
Noted that JPL Sentry has updated its 2008 OO risk assessment - see above
Noted that JPL Sentry has updated its 2008 PJ9 risk assessment - see above
Noted that NEODyS has updated its 2008 PJ9 risk assessment - see above
Noted that JPL Sentry has removed 2008 PR9 as an impact risk - see above
Noted that NEODyS has removed 2008 PR9 as an impact risk - see above
Grabbed MPEC 2008-P61 - Daily Orbit Update - see above
0119The NEOCP has become active