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Contents  on 23 September '08

• IAU Minor Planet Center
  • NEOCP Activity -- 17 listings: 6 new, 11 updated
  • New MPECs -- two MPECs
• Observers -- nineteen observing facilities
• Impact Risk Monitoring -- three objects
• Chronology

Resources:

• Consolidated Risk Tables - the CRT page
• Earth's Busy Neighborhood Traffic Report
• Ephemerides for risk-rated and nearby objects
• Old & new CRT Archive
• Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access,  RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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 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.

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NEOCP Activity  on 23 September '08

The MPC's NEO Confirmation Page has 17 listings: 6 new, 11 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and eleven updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 20 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.

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New MPECs  on 23 September '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-S36 time-stamped "06:06 UT" - Daily Orbit Update - see below
• MPEC 2008-S37 time-stamped "21:55 UT" - 2008 SN1

MPEC 2008-S37 - "21:55 UT" - 2008 SN1

• K08S01N   2008 SN1 (Q=4.041 AU, H=19.6 ~407m) was discovered at 0933 UT on 20 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 20.40-42p4 and 23.35-37p4. The discovery was confirmed by Great Shefford Obs. (Sept. 20.84-85p3, 21.00p1 & 21.06p1), Kinver Obs. (Sept. 20.96-97p4 & 23.84-88p4), Nazaret Obs. (Sept. 20.98-99p4 & 22.92-94p5), Jim Young via Table Mtn. Obs. (Sept. 21.19-21p4 & 23.21-25p4), Sabino Canyon Obs. (Sept. 21.23-24p2), Remanzacco Obs. (Sept. 21.94-95p2, 22.02p1 & 22.06p1), Astronomical Research Obs. (ARO) (Sept. 22.24-25p3 & 23.35p3), Junk Bond Obs. (Sept. 23.35-42p4), Desert Moon Obs. (Sept. 23.47-49p3), and the Spacewatch 1.8m telescope (Sept. 23.50-51p3).

<< DOU on 23 Sept. '08 >>  MPEC 2008-S36 - "06:06 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08S00T   2008 ST (small asteroid, arc=1 day, H=27.1 ~13m) from Spacewatch 1.8m (Sept. 23.10-11p3)
• K08S00R   2008 SR (almost small, arc=1 day, H=21.8 ~148m) from Great Shefford Obs. (Sept. 21.90-91p2)
• K08S00O   2008 SO (arc=2 days, H=20.9 ~224m) from Spacewatch 1.8m (Sept. 23.23-24p3)
• Observations of recently (no longer) risk-listed objects
• K08R00V   2008 RV (arc=17 days, H=21.7 ~155m) from LINEAR (Sept. 19.29-34p5)
• K08Q01C   2008 QC1 (small asteroid, Q=4.270 AU, arc=30 days, H=24.2 ~49m) from Spacewatch 1.8m (Sept. 22.45-46p3)
• Observations of small asteroids (H>22.0)
• K08S00A   2008 SA (arc=2 days, H=25.0 ~34m) from Chelmsford Obs. (Sept. 21.80p1), Golden Hill Obs. (Sept. 21.92-01p18), and ARO (Sept. 22.16-17p5)
• K08R01K   2008 RK1 (Q=4.372 AU, arc=18 days, H=22.3 ~117m) from Spacewatch 1.8m (Sept. 22.49-50p3)
• Observations of other objects
• K08R24Y   2008 RY24 (arc=3 opp, H=17.8 ~933m) from LINEAR (Sept. 22.17-22p5)
• K08Q00Z   2008 QZ (arc=31 days, H=20.4 ~282m) from LINEAR (Sept. 22.29-34p5)
• K08P16V   2008 PV16 (arc=7 days, H=21.3 ~186m) from Peschiera del Garda Obs. (Aug. 18.99-00p3)
• K08P09H   2008 PH9 (Q=4.545 AU, arc=47 days, H=16.4 ~1.78 km) from Desert Moon Obs. (Sept. 22.16-19p3)
• K08O00N   2008 ON (arc=54 days, H=20.3 ~295m) from Peschiera del Garda Obs. (Aug. 18.87-88p2)
• K07M13M   2007 MM13 (i=38.2°, arc=2 opp, H=17.7 ~977m) from Great Shefford Obs. (Sept. 18.14-18p2 & 20.10-12p2)
• K06S19U   2006 SU19 (arc=3 opp, H=19.1 ~513m) from the Spacewatch 0.9m telescope (Sept. 22.30-34p3)
• K05V00C   2005 VC (arc=2 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Sept. 4.33-35p2 & 22.35-37p3)
• K05L03R   2005 LR3 (arc=4 opp, H=17.2 ~1.23 km) from LINEAR (Sept. 22.42-46p4)
• K04E20N   2004 EN20 (i=40.1°, arc=3 opp, H=18.4 ~708m) from LINEAR (Sept. 22.35-40p5)
• K04A00E   2004 AE (arc=3 opp, H=20.7 ~245m) from Spacewatch 1.8m (Sept. 23.15-16p3)
• K03R10M   2003 RM10 (arc=4 opp, H=20.2 ~309m) from LINEAR (Sept. 21.12-14p3)
• K03F06Q   2003 FQ6 (arc=3 opp, H=20.9 ~224m) from LINEAR (Sept. 19.29-34p5)
• K02S41S   2002 SS41 (i=63.7°, arc=3 opp, H=17.2 ~1.23 km) from Mirasteilas Obs. (Sept. 22.81-83p3)
• K02S00P   2002 SP (q=0.361 AU, arc=3 opp, H=20.7 ~245m) from the Catalina Sky Survey (CSS) (Sept. 22.40-43p4)
• K01S10G   2001 SG10 (arc=5 opp, H=20.3 ~295m) from MLS (Sept. 22.44-47p4)
• J0166   190166 2005 UP156 from MLS (Sept. 22.44-47p4)
• I9700   189700 2001 TA45 from CSS (Sept. 22.29-32p4)
• G2566   162566 2000 RJ34 from MLS (Sept. 22.18-20p4)
• E4901   144901 2004 WG1 from the Siding Spring Survey (SSS) (Sept. 21.65-68p4)
• A8906   108906 2001 PL9 from Spacewatch 0.9m (Sept. 22.15-18p3)
• 65733   65733 1993 PC from MLS (Sept. 22.22-24p3) and LINEAR (Sept. 22.23-28p4)
• 24475   24475 2000 VN2 from SSS (Sept. 21.52-54p4)
• 11405   11405 1999 CV3 from LINEAR (Sept. 19.41-44p3)
• 11398   11398 1998 YP11 from SSS (Sept. 21.47-50p6)
• 08567   8567 1996 HW1 from Spacewatch 0.9m (Sept. 22.26-29p3)
• 05011   5011 Ptah (6743 P-L) from LINEAR (Sept. 19.23-28p5)
• 04257   4257 Ubasti (1987 QA) from LINEAR (Sept. 22.17-22p5)

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Observers  on 23 September '08

Nineteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 23 September '08

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 a variant 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" to learn more.

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Chronology  on 23 September '08

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