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Contents  on 22 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.

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NEOCP Activity  on 22 August '08

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

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter."

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

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New MPECs  on 22 August '08

Minor Planet Electronic Circulars

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


MPEC 2008-Q21 - "15:34 UT" - PHAs


MPEC 2008-Q20 - "15:34 UT" - Unusual Minor Planets


MPEC 2008-Q19 - "15:34 UT" - Amors


MPEC 2008-Q18 - "15:34 UT" - Atens and Apollos


MPEC 2008-Q17 - "15:29 UT" - Distant Minor Planets


MPEC 2008-Q16 - "14:21 UT" - Observable Comets


<< DOU on 22 Aug. '08 >>  MPEC 2008-Q15 - "06:08 UT" - Daily Orbit Update

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Observers  on 22 August '08

Twelve observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2008-Q15 -- 2008 PF2, 2008 OQ8, 2008 OP8, 2008 OO, 2008 ON13, 2008 OB9, 2008 NU, 2008 NB, 2008 MR1, 2008 JZ30, 2001 OE84, 2000 PQ9
J65Celbridge Obs. in Ireland, 1 in MPEC 2008-Q15 -- 2004 SB56
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-Q15 -- 2008 PW4
704LINEAR in New Mexico, 3 in MPEC 2008-Q15 -- 90403, 189700, 3752
J59Linceo Obs. in Spain, 1 in MPEC 2008-Q15 -- 4179
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-Q15 -- 2008 OC6
A13Naef Obs. in Switzerland, 3 in MPEC 2008-Q15 -- 2008 OX2, 2008 OP8, 2001 QL153
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-Q15 -- 2008 JZ30, 2000 DH8, 7888
H67Stonegate Obs. in Michigan, 1 in MPEC 2008-Q15 -- 164400
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2008-Q15 -- 8567
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-Q15 -- 2008 PW4
B42Vitebsk Obs. in Belarus, 2 in MPEC 2008-Q15 -- 164400, 8567
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 22 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 OB9JPL Sentry1454210611.7e-09-5.17-5.170JPL: "Analysis based on 35 observations spanning 21.776 days (2008-Jul-29.34054 to 2008-Aug-20.11628)." Diameter approximately 1.200 km. from mean, weighted H=17.3.
2008 OC6JPL Sentry1454R E M O V E DJPL: Risk listing removed at 0853 UTC.
NEODyS1454R E M O V E D-
2008 OOJPL Sentry1454210012.1e-06-3.16-3.160JPL: "Analysis based on 96 observations spanning 25.055 days (2008-Jul-26.09211 to 2008-Aug-20.14701)." 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.

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Chronology  on 22 August '08

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

1455Grabbed MPEC 2008-Q18 - Atens and Apollos - see above
Grabbed MPEC 2008-Q19 - Amors - see above
1454Noted that JPL Sentry has updated its 2008 OB9 risk assessment - see above
Noted that JPL Sentry has removed 2008 OC6 as an impact risk - see above
Noted that NEODyS has removed 2008 OC6 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 OO risk assessment - see above
Grabbed MPEC 2008-Q15 - Daily Orbit Update - see above
Grabbed MPEC 2008-Q16 - Observable Comets - see above
Grabbed MPEC 2008-Q17 - Distant Minor Planets - see above
Grabbed MPEC 2008-Q20 - Unusual Minor Planets - see above
Grabbed MPEC 2008-Q21 - PHAs - see above