Contents  on 16 August '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 16 August '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of ten listings on the NEOCP at some point today.

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 16 August '09

Minor Planet Electronic Circulars

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

MPEC 2009-Q04 - "23:05 UT" - 2009 QC

MPEC 2009-Q03 - "22:47 UT" - 2009 PT2

<< DOU on 16 Aug. '09 >>  MPEC 2009-Q02 - "06:06 UT" - Daily Orbit Update

MPEC 2009-Q01 - "00:13 UT" - 2009 PU1

Observers  on 16 August '09

A total of 25 observing facilities appear in today's MPECs.

CodeObserver / observatory
I08Alianza S4 Obs. in Argentina, 1 in MPEC 2009-Q02 -- 2009 ND1
H55Astronomical Research Obs. (ARO) in Illinois, 8 in MPECs 2009-Q02 & 2009-Q03 -- 2009 PT2, 2009 PH, 2009 OZ7, 2009 MZ6, 2009 MN8, 2009 LS, 2009 DR3, 2006 CX
J51Atlante Obs. in the Canary Islands, 4 in MPEC 2009-Q02 -- 2009 OG, 2009 OC, 2009 NH, 217430
J05Bootes Obs., 4 in MPEC 2009-Q02 -- 2009 OC, 11066, 8566, 1943
160Castelmartini Obs. in Italy, 5 in MPEC 2009-Q02 -- 2005 MC, 2002 NW16, 2001 OA14, 54401, 16834
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-Q02 & 2009-Q04 -- 2009 QC, 2009 OZ7, 2002 NP1, 162483, 5626
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPEC 2009-Q02 -- 2009 NA, 2009 MC9, 2002 NP1
113Drebach Obs. in Germany, 2 in MPEC 2009-Q02 -- 2009 OC, 1943
151Eschenberg Obs. in Switzerland, 3 in MPECs 2009-Q01 & 2009-Q02 -- 2009 PU1, 2009 OC, 2002 NP1
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-Q02 -- 2009 HB82
J95Great Shefford Obs. in England, 2 in MPECs 2009-Q02 & 2009-Q03 -- 2009 PU1, 2009 PT2
704LINEAR in New Mexico, 6 in MPECs 2009-Q01 & 2009-Q02 -- 2009 PU1, 2009 NL, 20826, 16834, 1943, 433
B28Mandi Obs. in Italy, 1 in MPEC 2009-Q04 -- 2009 QC
932McCarthy Obs. in Connecticut, 3 in MPEC 2009-Q02 -- 2009 MX6, 217390, 17274
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-Q02 -- 17274, 433
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2009-Q02 -- 2009 OG, 2009 NE
J53Posadas Obs. in Spain, 2 in MPEC 2009-Q02 -- 2002 NP1, 217430
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-Q02 -- 2001 HA4
510Siegen Obs. in Germany, 2 in MPEC 2009-Q02 -- 2009 NH, 2002 NP1
587Sormano Obs. in Italy, 1 in MPEC 2009-Q04 -- 2009 QC
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2009-Q02 & 2009-Q03 -- 2009 PT2, 17274, 5626
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-Q03 -- 2009 PT2
H53Thompsonville Obs. in Illinois, 4 in MPEC 2009-Q02 -- 2009 OG, 217390, 5626, 2100
C00Velikie Luki Obs., 1 in MPEC 2009-Q02 -- 1943
198Wildberg Obs. in Germany, 1 in MPEC 2009-Q01 -- 2009 PU1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 August '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 PU1JPL Sentry1525R E M O V E DJPL #2 for the day: Risk listing removed at 0850 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 16 August '09

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

2358Grabbed MPEC 2009-Q03 - 2009 PT2 - see above
Grabbed MPEC 2009-Q04 - 2009 QC - see above
1525Noted that JPL Sentry has removed 2009 PU1 as an impact risk - see above
Grabbed MPEC 2009-Q02 - Daily Orbit Update - see above
0223Noted that JPL Sentry has posted 2009 PU1 as an impact risk - see above
0017Grabbed MPEC 2009-Q01 - 2009 PU1 - see above