Contents  on 9 September '07


The latest news: framed access (best), RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site.

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 this year 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.

Minor-Object News  on 9 September '07

Minor-Object Science  on 9 September '07

NEOCP Activity  on 9 September '07

The MPC's NEO Confirmation Page has 8 listings: 5 new, 3 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and three updated listings. Of these, five were "one nighters." So far Major News has counted a total of nine objects listed on the NEOCP at some point today.

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

New MPECs  on 9 September '07

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-R36 - "17:00 UT" - Comet P/2007 R1 (Larson)

MPEC 2007-R35 - "15:38 UT" - 2006 UY64

<< DOU on 9 Sept. '07 >>  MPEC 2007-R34 - "06:07 UT" - Daily Orbit Update

Observers  on 9 September '07

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2007-R34 -- 3753
I77CEAMIG-REA in Brazil, 1 in MPEC 2007-R36 -- 2007 R1
160Castelmartini Obs. in Italy, 1 in MPEC 2007-R34 -- 16636
734Farpoint Obs. in Kansas, 1 in MPEC 2007-R36 -- 2007 R1
157Frasso Sabino Obs. in Italy, 1 in MPEC 2007-R36 -- 2007 R1
H51Greiner Research Obs. in Wisconsin, 2 in MPEC 2007-R34 -- 2007 RF5, 2007 RF2
B33Libbiano Obs. in Italy, 1 in MPEC 2007-R36 -- 2007 R1
232Masquefa Obs. in Spain, 1 in MPEC 2007-R36 -- 2007 R1
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-R36 -- 2007 R1
A13Naef Obs. in Switzerland, 1 in MPEC 2007-R34 -- 2007 LR32
A53Peschiera del Garda Obs. in Italy, 2 in MPEC 2007-R34 -- 2007 PE8, 2007 LR32
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-R36 -- 2007 R1
473Remanzacco Obs. in Italy, 2 in MPECs 2007-R34 & 2007-R36 -- 2007 R1, 2007 PE8
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-R34 -- 2007 RF2
204Schiaparelli Obs. in Italy, 2 in MPECs 2007-R35 & 2007-R36 -- 2007 R1, 2006 UY64
E12Siding Spring Survey in New South Wales, 1 in MPEC 2007-R34 -- 136849
B40Skylive Obs. in Italy, 1 in MPEC 2007-R36 -- 2007 R1
673Table Mtn. Obs. in southern California, 1 in MPEC 2007-R36 -- 2007 R1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-R34 -- 2007 RO1

Impact Risk Monitoring  on 9 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2307 and JPL at 2356 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now 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
2007 RF2JPL1510210718.9e-10-6.89-6.890JPL: "Analysis based on 27 observations spanning 3.5989 days (2007-Sep-05.41331 to 2007-Sep-09.01224)." Diameter approximately 0.280 km. from mean, weighted H=20.4.

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 an 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" for more about this.

Chronology  on 9 September '07

Times are UTC for when the items were noted or added by Major News.

1819Added link to news story, "World's largest radio telescope in peril" - see above
1818Grabbed MPEC 2007-R36 - Comet P/2007 R1 (Larson) - see above
1702Grabbed MPEC 2007-R35 - 2006 UY64 - see above
1557Added MOS paper, "On the Distance to the Ophiuchus Star-Forming Region" - see above
Added MOS paper, "The distance to the Orion Nebula" - see above
1510Noted that JPL has updated its 2007 RF2 risk assessment - see above
Noted that NEODyS has removed 2007 RF2 as an impact risk - see above
Grabbed MPEC 2007-R34 - Daily Orbit Update - see above