Contents  on 21 September '07


Note: Until September 16th this daily news page, which had included links to news and science papers as well as some occasional original reporting, was called Major News About Minor Objects. Without the news-link and science-link sections, this page was renamed as The Tracking News to more more accurately reflect its continuing purpose.

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.

NEOCP Activity  on 21 September '07

The MPC's NEO Confirmation Page has 6 listings: 3 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and three updated listings. Of these, four were "one nighters." So far Tracking News has counted a total of twelve 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 21 September '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-S39 - "17:14 UT" - 2007 SW2

MPEC 2007-S38 - "17:08 UT" - 2007 SV2

<< DOU on 21 Sept. '07 >>  MPEC 2007-S37 - "06:09 UT" - Daily Orbit Update

Observers  on 21 September '07

A total of 24 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2007-S39 -- 2007 SW2
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-S37 -- 152787
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S37 -- 2007 RR12
703Catalina Sky Survey in Arizona, 12 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 2007 RR12, 2007 RE1, 2007 PU11, 2007 KN4, 2004 TR13, 2004 SD26, 2004 DM44, 2002 RC118, 68950, 152787, 6489
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-S39 -- 2007 SW2
151Eschenberg Obs. in Switzerland, 2 in MPEC 2007-S37 -- 1999 JU3, 1998 SD15
B32Gelenau Obs. in Germany, 1 in MPEC 2007-S37 -- 2007 LR32
683Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2007-S37 -- 2007 OV, 1988 PA
H51Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-S37 -- 2007 RR12, 2007 RF5, 1998 SD15
458Guadarrama Obs. in Spain, 2 in MPEC 2007-S37 -- 2007 LR32, 433
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2007-S37 -- 2007 PU11, 2007 LR32, 2002 SV, 1998 SD15
024Heidelberg-Konigstuhl Obs. in Germany, 2 in MPECs 2007-S38 & 2007-S39 -- 2007 SW2, 2007 SV2
699LONEOS in Arizona, 5 in MPEC 2007-S37 -- 2007 RU9, 2007 DT103, 2002 SV, 1988 PA, 5786
130Lumezzane Obs. in Italy, 4 in MPEC 2007-S37 -- 2007 RR12, 2007 RP15, 2002 SV, 16636
G96Mt. Lemmon Survey in Arizona, 2 in MPECs 2007-S37 & 2007-S38 -- 2007 SV2, 68950
A13Naef Obs. in Switzerland, 3 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 153271, 100756
J47Nazaret Obs. in Spain, 1 in MPEC 2007-S37 -- 16636
H45Petit Jean Mtn. South Obs. in Arkansas, 17 in MPEC 2007-S37 -- 2007 RU17, 2007 RR12, 2007 RE1, 2007 RD1, 2007 QK2, 2007 PU11, 2007 PE8, 2007 LR32, 2007 HE15, 2003 SW222, 2003 OR14, 2002 SV, 2000 RW37, 1999 JU3, 1998 SD15, 16636, 105140
473Remanzacco Obs. in Italy, 3 in MPECs 2007-S37 & 2007-S39 -- 2007 SW2, 2007 RW19, 2001 SA270
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-S37 -- 2007 SV1
204Schiaparelli Obs. in Italy, 3 in MPECs 2007-S37, 2007-S38 & 2007-S39 -- 2007 SW2, 2007 SV2, 2007 RW19
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2007-S37 -- 2007 RV17, 2007 RA20
E12Siding Spring Survey in New South Wales, 4 in MPEC 2007-S37 -- 2007 RY9, 2007 RQ12, 2007 FV42, 2007 DK8
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2007-S37 & 2007-S38 -- 2007 SV2, 2007 PQ, 2007 OV, 2000 HO14, 1997 GH28

Impact Risk Monitoring  on 21 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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 RU9JPL14202020-203932.8e-07-4.02-4.200JPL: "Analysis based on 74 observations spanning 7.9421 days (2007-Sep-10.28596 to 2007-Sep-18.22807)." Diameter approximately 0.230 km. from mean, weighted H=20.8.
NEODyS14202018-203022.43e-07-4.14-4.140NEODyS: "Based on 76 optical observations (of which 2 are rejected as outliers) from 2007/09/10.287 to 2007/09/18.229."

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 21 September '07

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

1716Grabbed MPEC 2007-S38 - 2007 SV2 - see above
Grabbed MPEC 2007-S39 - 2007 SW2 - see above
1421Grabbed MPEC 2007-S37 - Daily Orbit Update - see above
1420Noted that JPL has updated its 2007 RU9 risk assessment - see above
Noted that NEODyS has updated its 2007 RU9 risk assessment - see above