Contents  on 8 February '09

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 8 February '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were two listings noted earlier today.

New MPECs  on 8 February '09

Minor Planet Electronic Circulars

As of last check at 2259 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 8 Feb. '09 >>  MPEC 2009-C64 - "07:07 UT" - Daily Orbit Update

Observers  on 8 February '09

Eight observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-C64 -- 2009 CU
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-C64 -- 1999 AQ10, 68350
J95Great Shefford Obs. in England, 4 in MPEC 2009-C64 -- 2009 CZ2, 2009 CP, 2009 CA3, 2009 BL71
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2009-C64 -- 1998 SZ14
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-C64 -- 2002 KM3
608NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2009-C64 -- 2004 KF15, 2002 PO75
204Schiaparelli Obs. in Italy, 2 in MPEC 2009-C64 -- 2009 AF16, 2008 YR27
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-C64 -- 2009 CC3, 85953, 3552, 1943
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 February '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2259 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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
2009 CC3JPL Sentry15412095-210453.9e-07-3.84-4.220JPL: "Analysis based on 34 observations spanning 2.9723 days (2009-Feb-04.62941 to 2009-Feb-07.60175)." Diameter approximately 0.540 km. from mean, weighted H=19.0.
2009 BL71JPL Sentry1541R E M O V E DJPL: Risk listing removed at 0955 UTC.

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 8 February '09

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

1541Noted that JPL Sentry has removed 2009 BL71 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 CC3 risk assessment - see above
Grabbed MPEC 2009-C64 - Daily Orbit Update - see above
Noted that the NEOCP has become empty