Contents  on 23 September '07


Notes: Due to travel, these pages will update irregularly for the rest of the month.
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 23 September '07

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

When last checked at 2130 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters." So far Tracking 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 23 September '07

Minor Planet Electronic Circulars

As of last check at 2130 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2007-S45 - "19:29 UT" - 2007 SQ6

MPEC 2007-S44 - "19:25 UT" - 2007 SP6

MPEC 2007-S43 - "19:20 UT" - 2007 SO6

MPEC 2007-S42 - "19:16 UT" - 2007 SN6

<< DOU on 23 Sept. '07 >>  MPEC 2007-S41 - "06:11 UT" - Daily Orbit Update

Observers  on 23 September '07

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
A39Altenburg Obs. in Germany, 1 in MPEC 2007-S41 -- 2007 RR12
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2007-S45 -- 2007 SQ6
H55Astronomical Research Obs. in Illinois, 7 in MPECs 2007-S41, 2007-S43, 2007-S44 & 2007-S45 -- 2007 SU1, 2007 SQ6, 2007 SP6, 2007 SO6, 2007 RU12, 2007 RD20, 2007 PP9
I77CEAMIG-REA in Brazil, 1 in MPEC 2007-S44 -- 2007 SP6
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-S44 -- 2007 SP6
448Desert Moon Obs. in New Mexico, 8 in MPEC 2007-S41 -- 2007 SJ, 2007 RU12, 2007 RU10, 2007 RT19, 2007 RL133, 2007 RH1, 2007 RD20, 68359
639Dresden Obs. in Germany, 2 in MPEC 2007-S41 -- 2002 SV, 1998 SD15
734Farpoint Obs. in Kansas, 4 in MPECs 2007-S42, 2007-S43, 2007-S44 & 2007-S45 -- 2007 SQ6, 2007 SP6, 2007 SO6, 2007 SN6
J95Great Shefford Obs. in England, 6 in MPECs 2007-S41, 2007-S42, 2007-S43, 2007-S44 & 2007-S45 -- 2007 SQ6, 2007 SP6, 2007 SO6, 2007 SN6, 2007 SJ, 2007 RW19
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2007-S41 -- 2007 PU11, 1998 SD15
024Heidelberg-Konigstuhl Obs. in Germany, 1 in MPEC 2007-S45 -- 2007 SQ6
F84Hibiscus Obs. in Tahiti, 2 in MPECs 2007-S43 & 2007-S44 -- 2007 SP6, 2007 SO6
196Homburg-Erbach Obs. in Germany, 4 in MPEC 2007-S41 -- 2007 PU11, 2007 LR32, 1998 SD15, 16636
704LINEAR in New Mexico, 7 in MPECs 2007-S41, 2007-S42, 2007-S43 & 2007-S45 -- 2007 SQ6, 2007 SO6, 2007 SN6, 2007 OV, 2002 RT129, 154278, 3200
A24New Millennium Obs. in Italy, 2 in MPEC 2007-S41 -- 2007 PE8, 2007 LR32
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-S44 -- 2007 SP6
473Remanzacco Obs. in Italy, 2 in MPECs 2007-S43 & 2007-S44 -- 2007 SP6, 2007 SO6
204Schiaparelli Obs. in Italy, 4 in MPECs 2007-S41, 2007-S42, 2007-S43 & 2007-S45 -- 2007 SR1, 2007 SQ6, 2007 SO6, 2007 SN6
D21Shenton Park Obs. in Western Australia, 1 in MPEC 2007-S44 -- 2007 SP6
E12Siding Spring Survey in New South Wales, 1 in MPEC 2007-S44 -- 2007 SP6

Impact Risk Monitoring  on 23 September '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2130 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 SJNEODyS13332014-2078191.94e-06-1.44-1.981NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2007/09/17.183 to 2007/09/22.937. NOTE: The Virtual Impactor in 2078/01/15.514 in the table above is rated as Torino Scale 1."

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 23 September '07

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

2130Grabbed MPEC 2007-S42 - 2007 SN6 - see above
Grabbed MPEC 2007-S43 - 2007 SO6 - see above
Grabbed MPEC 2007-S44 - 2007 SP6 - see above
Grabbed MPEC 2007-S45 - 2007 SQ6 - see above
1333Noted that NEODyS has updated its 2007 SJ risk assessment - see above
Grabbed MPEC 2007-S41 - Daily Orbit Update - see above