Contents  on 24 July '09


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 24 July '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 24 July '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-O29 - "13:12 UT" - 2009 OC3

MPEC 2009-O28 - "13:04 UT" - 2009 OB3

<< DOU on 24 July '09 >>  MPEC 2009-O27 - "06:07 UT" - Daily Orbit Update

Observers  on 24 July '09

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPEC 2009-O27 -- 2009 OF, 2009 NL, 2009 NJ, 2009 NH, 2009 NA, 2009 MZ6, 2009 MX6, 2009 ML1, 2009 LS, 2009 KJ22
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-O27 -- 2002 LV
J05Bootes Obs., 2 in MPEC 2009-O27 -- 2009 OF, 2009 NA
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-O29 -- 2009 OC3
I21El Condor Obs. in Argentina, 6 in MPEC 2009-O27 -- 2009 OG, 2009 MC9, 52768, 52762, 17274, 143651
J95Great Shefford Obs. in England, 1 in MPEC 2009-O29 -- 2009 OC3
704LINEAR in New Mexico, 9 in MPECs 2009-O27 & 2009-O29 -- 2009 OC3, 2009 NL, 2009 MX6, 2005 YX128, 2002 UX, 215442, 194386, 163902, 5620
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2009-O27, 2009-O28 & 2009-O29 -- 2009 OF, 2009 OC3, 2009 OB3
B28Mandi Obs. in Italy, 2 in MPEC 2009-O27 -- 2009 OF, 2002 LV
D90`K. Hills via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-O28 -- 2009 OB3
I20Rio Cuarto Obs. in Argentina, 5 in MPECs 2009-O27 & 2009-O28 -- 2009 OB3, 2009 NJ, 2009 MX6, 2009 MC9, 2009 MB9
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-O29 -- 2009 OC3
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-O29 -- 2009 OC3
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2009-O27 & 2009-O28 -- 2009 OG, 2009 OB3, 2009 MC9, 2006 TU7, 1566
I19Tanti Obs. in Argentina, 3 in MPECs 2009-O27, 2009-O28 & 2009-O29 -- 2009 OF, 2009 OC3, 2009 OB3
A48Verona Obs. in Italy, 3 in MPEC 2009-O27 -- 2009 OC, 2009 NE, 2002 LV
J08Zonalunar Obs. in Spain, 2 in MPEC 2009-O27 -- 2009 JK1, 2002 LV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 July '09

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.
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.





Notes for Today's Latest Risk Assessments
2009 OFJPL Sentry1301203917.8e-07-4.11-4.110JPL: "Analysis based on 87 observations spanning 7.0313 days (2009-Jul-17.21281 to 2009-Jul-24.24407)." Diameter approximately 0.180 km. from mean, weighted H=21.3.
NEODyS1301203911.13e-06-3.94-3.940NEODyS: "Based on 87 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/24.245."

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 24 July '09

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

1407Grabbed MPEC 2009-O28 - 2009 OB3 - see above
Grabbed MPEC 2009-O29 - 2009 OC3 - see above
Noted that the NEOCP has become empty
1301Noted that JPL Sentry has updated its 2009 OF risk assessment - see above
Noted that NEODyS has updated its 2009 OF risk assessment - see above
Grabbed MPEC 2009-O27 - Daily Orbit Update - see above