Contents on 29 September '07
- IAU Minor Planet Center
- Impact Risk Monitoring -- one object reported
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 accurately reflect its continuing purpose.
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 29 September '07
The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated
When last checked at 1431 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, two were "one nighters."
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 29 September '07
Minor Planet Electronic Circulars
As of last check at 1431 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of recently (no longer) risk-listed objects
- K07RE6T 2007 RT146 (arc=2 opp, H=19.2 ~490m) from the Sloan Digital Sky Survey (SDSS) (2002 Oct. 31.29p2 & 2002 Nov. 7.24-25p2)
- Observations of small asteroids (H>22.0)
- K07S11G 2007 SG11 (arc=4 days, H=22.7 ~98m) from Greiner Research Obs. (Sept. 27.13p3 & 28.16-17p3) and Astronomical Research Obs. (ARO) (Sept. 28.13p3)
- Observations of other objects
- K07L32R 2007 LR32 (arc=126 days, H=17.2 ~1.23 km) from Begues Obs. (Sept. 28.93-94p3)
- K02S00V 2002 SV (arc=2 opp, H=19.8 ~371m) from Begues Obs. (Sept. 28.86p3)
- G4216 164216 2004 OT11 from Camarillo Obs. (Sept. 15.17p2)
- G3902 163902 2003 SW222 from Begues Obs. (Sept. 28.92p3)
- G2173 162173 1999 JU3 from Bisei Spaceguard Center (Bisei) (Sept. 6.52-54p5, 7.77-78p5 & 10.48-50p7), Camarillo Obs. (Sept. 15.25p1), Hadano Obs. (Sept. 17.49p3), and Begues Obs. (Sept. 28.81-84p4)
- G2117 162117 1998 SD15 from Greiner Research Obs. (Sept. 27.18p3)
- 16636 16636 1993 QP from Begues Obs. (Sept. 28.87-91p3)
Observers on 29 September '07
Seven observing facilities appear in today's MPEC.
|Code||Observer / observatory|
|H55||Astronomical Research Obs. in Illinois, 1 in MPEC 2007-S69 -- 2007 SG11|
|170||Begues Obs. in Spain, 5 in MPEC 2007-S69 -- 2007 LR32, 2002 SV, 16636, 163902, 162173|
|300||Bisei Spaceguard Center in Japan, 1 in MPEC 2007-S69 -- 162173|
|670||Camarillo Obs. in southern California, 2 in MPEC 2007-S69 -- 164216, 162173|
|H51||Greiner Research Obs. in Wisconsin, 2 in MPEC 2007-S69 -- 2007 SG11, 162117|
|355||Hadano Obs. in Japan, 1 in MPEC 2007-S69 -- 162173|
|645||Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2007-S69 -- 2007 RT146|
Impact Risk Monitoring on 29 September '07
Notes for Today's Latest Risk Assessments
|2007 SR11||NEODyS||1432||2017-2071||6||9.71e-09||-6.00||-6.13||0||NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2007/09/26.343 to 2007/09/27.468."|
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.