Contents  on 18 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.

Radar Astrometry  on 18 July '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:

Data addition noted at 0521 UTC when the database was dated 17 July

NEOCP Activity  on 18 July '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on July 15th.

New MPECs  on 18 July '08

Minor Planet Electronic Circulars

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

<< DOU on 18 July '08 >>  MPEC 2008-O10 - "06:06 UT" - Daily Orbit Update

Observers  on 18 July '08

Six observing facilities appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 90403
H55Astronomical Research Obs. (ARO) in Illinois, 15 in MPEC 2008-O10 -- 2008 KZ5, 2008 JT35, 2007 YQ56, 2005 VT5, 2005 NB7, 2004 XO14, 2004 TG10, 2004 LV3, 2004 JW20, 2003 OB4, 2003 NC, 2001 TA45, 2000 RL77, 189058, 189040
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 90403
130Lumezzane Obs. in Italy, 2 in MPEC 2008-O10 -- 2008 NU, 54789
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPEC 2008-O10 -- 2008 NS1, 2008 NO3, 2008 MZ, 2008 MH1, 2008 EC69, 2008 BT18, 887
H67Stonegate Obs. in Michigan, 1 in MPEC 2008-O10 -- 35107
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 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 NO3JPL Sentry14272032-2099253.1e-07-3.22-3.590JPL: "Analysis based on 14 observations spanning 3.0087 days (2008-Jul-14.36382 to 2008-Jul-17.37255)." Diameter approximately 0.680 km. from mean, weighted H=18.5.
NEODyS14272032-2090272.34e-07-3.29-3.650NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/07/14.365 to 2008/07/17.373."

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 18 July '08

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

1427Noted that JPL Sentry has updated its 2008 NO3 risk assessment - see above
Noted that NEODyS has updated its 2008 NO3 risk assessment - see above
Grabbed MPEC 2008-O10 - Daily Orbit Update - see above
0521Noted Radar Astrometry database addition - see above