Contents  on 19 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 19 July '09

The MPC's NEO Confirmation Page has 3 listings: 2 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and one updated listings. Of these, two were "one nighters."

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

New MPECs  on 19 July '09

Minor Planet Electronic Circulars

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

MPEC 2009-O16 - "15:22 UT" - 2009 OC = 2006 TE1

<< DOU on 19 July '09 >>  MPEC 2009-O15 - "06:06 UT" - Daily Orbit Update

Observers  on 19 July '09

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2009-O15 -- 162483
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-O15 -- 433
B88Bigmuskie Obs. in Italy, 1 in MPEC 2009-O15 -- 194386
B23Fiamene Obs. in Italy, 2 in MPEC 2009-O15 -- 2009 NE, 2005 SN25
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-O15 -- 2009 OF
232Masquefa Obs. in Spain, 2 in MPEC 2009-O15 -- 2009 NL, 2009 NE
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2009-O15 -- 2009 OC, 2009 NL, 2009 KL2, 2002 LV
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2009-O15 -- 2009 OC, 2009 NL, 2009 NH, 2009 NE, 2009 KL2, 2007 LL, 2002 LV
J53Posadas Obs. in Spain, 1 in MPEC 2009-O15 -- 2009 OC
233San Vito Obs. in Italy, 1 in MPEC 2009-O15 -- 2002 LV
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-O15 -- 2009 OF
E12Siding Spring Survey (SSS) in New South Wales, 10 in MPEC 2009-O15 -- 2009 OG, 2009 MX6, 2009 MM8, 2009 MC9, 2009 MB9, 2008 NP3, 2001 FE90, 1999 CW8, 68216, 3554
B40Skylive Obs. in Italy, 1 in MPEC 2009-O16 -- 2009 OC
F85Tiki Obs. in Tahiti, 1 in MPEC 2009-O15 -- 2009 OC
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 Sentry1446203922.5e-06-3.53-3.820JPL: "Analysis based on 22 observations spanning 2.0005 days (2009-Jul-17.21281 to 2009-Jul-19.21328)." Diameter approximately 0.200 km. from mean, weighted H=21.2.
NEODyS1446203923.59e-06-3.39-3.520NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/19.214."

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 19 July '09

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

1710Grabbed MPEC 2009-O16 - 2009 OC = 2006 TE1 - see above
1446Noted that JPL Sentry has updated its 2009 OF risk assessment - see above
Noted that NEODyS has posted 2009 OF as an impact risk - see above
Grabbed MPEC 2009-O15 - Daily Orbit Update - see above