Contents  on 7 August '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 7 August '08

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

When last checked at 2328 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of three 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 7 August '08

Minor Planet Electronic Circulars

As of last check at 2328 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-P35 - "22:08 UT" - 2008 PG7

<< DOU on 7 Aug. '08 >>  MPEC 2008-P34 - "06:09 UT" - Daily Orbit Update

Observers  on 7 August '08

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2008-P34 -- 2008 OS9
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-P35 -- 2008 PG7
639Dresden Obs. in Germany, 1 in MPEC 2008-P34 -- 11398
151Eschenberg Obs. in Switzerland, 3 in MPECs 2008-P34 & 2008-P35 -- 2008 PG7, 2008 PF1, 2008 OP8
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-P34 -- 2008 OS9, 2004 SB56, 90403
185Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2008-P34 -- 11398
J75La Sagra Obs. in Spain, 1 in MPEC 2008-P35 -- 2008 PG7
620Mallorca Obs. on Mallorca, 1 in MPEC 2008-P35 -- 2008 PG7
932McCarthy Obs. in Connecticut, 3 in MPEC 2008-P34 -- 2008 OX1, 2003 OB4, 188452
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-P34 -- 2008 OM, 1999 YF3, 66008
A13Naef Obs. in Switzerland, 1 in MPEC 2008-P34 -- 2008 PE1
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-P35 -- 2008 PG7
H36Sandlot Obs. in Kansas, 1 in MPEC 2008-P35 -- 2008 PG7
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-P34 -- 2008 NS1, 2007 MC4, 163000
H53Thompsonville Obs. in Illinois, 2 in MPEC 2008-P34 -- 188452, 8567
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-P34 -- 2006 GQ2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 August '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2328 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 PW4NEODyS19002029-2090464.76e-06-3.97-4.490NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/08/05.559 to 2008/08/06.496."
2008 PF1JPL Sentry1457210323.6e-09-7.29-7.320JPL: "Analysis based on 41 observations spanning 3.6804 days (2008-Aug-03.27394 to 2008-Aug-06.9543)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS14572024-206567.71e-10-7.53-7.610NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2008/08/03.275 to 2008/08/06.955."

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 August '08

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

2300Grabbed MPEC 2008-P35 - 2008 PG7 - see above
1859Noted that NEODyS has posted 2008 PW4 as an impact risk - see above
1457Noted that JPL Sentry has updated its 2008 PF1 risk assessment - see above
Noted that NEODyS has updated its 2008 PF1 risk assessment - see above
Grabbed MPEC 2008-P34 - Daily Orbit Update - see above