Contents  on 5 October '07


Notes: 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 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 5 October '07

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." So far Tracking News has counted a total of fourteen 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 5 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-T21 - "21:59 UT" - 2007 TH1

MPEC 2007-T20 - "19:15 UT" - 2007 TG1

MPEC 2007-T19 - "16:46 UT" - 2007 TD1

MPEC 2007-T18 - "16:42 UT" - 2007 TC1

MPEC 2007-T17 - "16:28 UT" - 2007 RT147

<< DOU on 5 Oct. '07 >>  MPEC 2007-T16 - "06:07 UT" - Daily Orbit Update

Observers  on 5 October '07

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 20 in MPECs 2007-T16 & 2007-T20 -- 2007 TG1, 2007 RZ8, 2007 RX8, 2007 RU12, 2007 RU10, 2007 RT19, 2007 RS146, 2007 RS12, 2007 RQ17, 2007 RQ133, 2007 RQ12, 2007 RP17, 2007 RP12, 2007 RO1, 2007 PQ, 2007 PD8, 2007 NC5, 2007 MM13, 2005 WK4, 2004 XH29
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2007-T16 -- 2007 LR32, 2212
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2007-T16, 2007-T17, 2007-T18 & 2007-T19 -- 2007 TD1, 2007 TC1, 2007 SQ6, 2007 RT147, 2007 RN276, 2007 QK2, 2001 RY47, 2000 TH1, 90373, 85770, 162117, 5143, 4954, 4183
J65Celbridge Obs. in Ireland, 1 in MPEC 2007-T16 -- 2007 SG11
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-T16 -- 2007 RU12
734Farpoint Obs. in Kansas, 1 in MPEC 2007-T19 -- 2007 TD1
651Grasslands Obs. in Arizona, 4 in MPECs 2007-T17, 2007-T18, 2007-T19 & 2007-T21 -- 2007 TH1, 2007 TD1, 2007 TC1, 2007 RT147
J95Great Shefford Obs. in England, 1 in MPEC 2007-T19 -- 2007 TD1
024Heidelberg-Konigstuhl Obs. in Germany, 1 in MPEC 2007-T21 -- 2007 TH1
240Herrenberg Obs. in Germany, 2 in MPEC 2007-T16 -- 2007 SV11, 2007 SG11
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2007-T16 -- 2007 RA20
699LONEOS in Arizona, 3 in MPECs 2007-T16 & 2007-T17 -- 2007 RT147, 2007 RN276, 145656
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2007-T16 -- 2007 TD
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-T20 -- 2007 TG1
A24New Millennium Obs. in Italy, 3 in MPEC 2007-T16 -- 86829, 40267, 154453
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-T17 -- 2007 RT147
204Schiaparelli Obs. in Italy, 2 in MPEC 2007-T16 -- 2007 SG11, 2007 PU11
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2007-T16 -- 2007 PP6, 2000 TH1
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2007-T16 -- 2007 TD, 2007 SS1, 2007 RN276, 2007 PR9
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2007-T16 -- 52768, 6489, 2212
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2007-T16, 2007-T20 & 2007-T21 -- 2007 TH1, 2007 TG1, 2007 SR11, 2007 RZ8, 2007 RZ19, 2007 RX8, 2007 RS146, 2007 RS12, 2007 RQ17, 2007 RP12, 2007 PB8, 2006 RJ1, 2004 XH29, 2003 SJ170
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-T17 -- 2007 RT147

Impact Risk Monitoring  on 5 October '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 TG1JPL23072095-210133.8e-09-8.29-8.480JPL: "Analysis based on 10 observations spanning .95398 days (2007-Oct-04.25531 to 2007-Oct-05.209292)." Diameter approximately 0.043 km. from mean, weighted H=24.5.
2007 SR11JPL14082022-209034.9e-09-6.39-6.540JPL: "Analysis based on 26 observations spanning 7.9268 days (2007-Sep-26.34262 to 2007-Oct-04.26946)." Diameter approximately 0.150 km. from mean, weighted H=21.8.

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 5 October '07

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

2307Noted that JPL has posted 2007 TG1 as an impact risk - see above
Grabbed MPEC 2007-T21 - 2007 TH1 - see above
2017Grabbed MPEC 2007-T20 - 2007 TG1 - see above
1650Grabbed MPEC 2007-T19 - 2007 TD1 - see above
1647Grabbed MPEC 2007-T17 - 2007 RT147 - see above
Grabbed MPEC 2007-T18 - 2007 TC1 - see above
1408Noted that JPL has updated its 2007 SR11 risk assessment - see above
Grabbed MPEC 2007-T16 - Daily Orbit Update - see above