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Contents  on 5 September '08

• IAU Minor Planet Center
  • NEOCP Activity -- two listings: 2 updated
  • New MPECs -- six MPECs
• Observers -- twelve observing facilities
• Impact Risk Monitoring -- two 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.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

NEOCP Activity  on 5 September '08

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

When last checked at 2359 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. So far The Tracking News has counted a total of eight 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.

<<   Top | Contents | NEOCP | MPECs | Observers | Risks | Chronology | Index   >>

New MPECs  on 5 September '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been six MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-R25 time-stamped "06:08 UT" - Daily Orbit Update - see below
• MPEC 2008-R26 time-stamped "15:56 UT" - 2008 RG1 - see below
• MPEC 2008-R27 time-stamped "16:22 UT" - 2008 RH1 - see below
• MPEC 2008-R28 time-stamped "16:37 UT" - 2008 RJ1 - see below
• MPEC 2008-R29 time-stamped "16:42 UT" - 2008 RK1 - see below
• MPEC 2008-R30 time-stamped "17:14 UT" - Comet P/2001 X2 = 2008 R2 (Scotti)

MPEC 2008-R30 - "17:14 UT" - Comet P/2001 X2 = 2008 R2 (Scotti)

• PK08R020   P/2008 R2 (q=2.527 AU, Q=5.026 AU, TP=2009 Feb. 7.01580 TT) from the Mt. Lemmon Survey (MLS) (2007 Sept. 13.24-26p4 & 2007 Oct. 8.20-22p4), the Spacewatch 0.9m telescope (Aug. 7.41-44p3), and the Spacewatch 1.8m telescope (Sept. 5.43-46p3)
• PK01X020   P/2001 X2 (Scotti) (q=2.524 AU, Q=5.031 AU, TP=2001 Oct. 14.76935 TT)

MPEC 2008-R29 - "16:42 UT" - 2008 RK1

• K08R01K   2008 RK1 (small asteroid, Q=4.714 AU, H=22.2 ~123m) was discovered at 1023 UT on 4 Sept. by Spacewatch 1.8m, which observed it at Sept. 4.43-48p6 and 5.31-32p2.

MPEC 2008-R28 - "16:37 UT" - 2008 RJ1

• K08R01J   2008 RJ1 (risk-listed, Earth MOID=3.3 LD, H=17.3 ~1.17 km) was discovered at 0942 UT on 4 Sept. by Spacewatch 0.9m, which observed it at Sept. 4.40-44p3. The discovery was confirmed by Spacewatch 1.8m (Sept. 4.48-49p3 & 5.27p3) and Sandlot Obs. (Sept. 5.42-44p3).

MPEC 2008-R27 - "16:22 UT" - 2008 RH1

• K08R01H   2008 RH1 (borderline-small, H=22.0 ~135m) was discovered at 0823 UT on 4 Sept. by Spacewatch 0.9m, which observed it at Sept. 4.35-38p3. The discovery was confirmed by Spacewatch 1.8m (Sept. 4.43-44p3 & 5.34-35p3).

MPEC 2008-R26 - "15:56 UT" - 2008 RG1

• K08R01G   2008 RG1 (risk-listed, Earth MOID=8.1 LD, H=20.7 ~245m) was discovered at 0619 UT on 4 Sept. by LINEAR, which observed it at Sept. 4.26-32p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Sept. 5.36-37p4) and Sandlot Obs. (Sept. 5.41p3).

<< DOU on 5 Sept. '08 >>  MPEC 2008-R25 - "06:08 UT" - Daily Orbit Update

• Observations of recently (no longer) risk-listed objects
• K08Q03T   2008 QT3 (arc=10 days, H=18.4 ~708m) from McDonald Obs. (Sept. 4.27p3)
• K08O08Q   2008 OQ8 (almost small, arc=36 days, H=21.9 ~141m) from McDonald Obs. (Sept. 4.38-40p3)
• Observations of small asteroids (H>22.0)
• J98S09D   1998 SD9 (q=0.348 AU, arc=2 opp, H=24.1 ~51m) from Polaris Obs. (Sept. 4.92-93p3), Skylive Obs. (Sept. 4.93-94p3), and Tacande Obs. (Sept. 5.00-02p4)
• Observations of other objects
• K08Q00F   2008 QF (arc=14 days, H=21.7 ~155m) from McDonald Obs. (Sept. 4.23-26p3)
• K07Y00Z   2007 YZ (arc=2 opp, H=19.6 ~407m) from Spacewatch 1.8m (Sept. 4.50-51p3)
• K06W29Q   2006 WQ29 (arc=3 opp, H=18.1 ~812m) from Spacewatch 1.8m (Sept. 4.45-46p2)
• K06S19U   2006 SU19 (arc=3 opp, H=19.1 ~513m) from Spacewatch 1.8m (Sept. 4.39-42p3)
• K05B02Y   2005 BY2 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (Sept. 4.36-38p3 at V=22.0-22.3)
• K04E20N   2004 EN20 (i=40.1°, arc=3 opp, H=18.5 ~676m) from McDonald Obs. (Sept. 4.43-44p2)
• K03G00W   2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Polaris Obs. (Sept. 4.84-86p4)
• K02T70B   2002 TB70 (arc=2 opp, H=21.7 ~155m) from Spacewatch 1.8m (Sept. 4.21-22p3)
• K01SR6G   2001 SG276 (arc=4 opp, H=17.7 ~977m) from McDonald Obs. (Sept. 4.44-46p3)
• K01Q96H   2001 QH96 (arc=4 opp, H=18.1 ~812m) from McDonald Obs. (Sept. 4.47-49p3)
• K00U11G   2000 UG11 (arc=2 opp, H=20.4 ~282m) from Spacewatch 1.8m (Sept. 4.22-23p3)
• K00CA1O   2000 CO101 (arc=2 opp, H=19.2 ~490m) from Young/Table Mtn. (Sept. 3.50-51p3 & 4.48-51p3)
• J94A01W   1994 AW1 (arc=3 opp, H=17.5 ~1.07 km) from Polaris Obs. (Sept. 4.80-82p3)
• I8452   188452 2004 HE62 from Taurus-1 Obs. (Sept. 2.80-83p20 & 3.83-84p14)
• G2911   162911 2001 LL5 from McDonald Obs. (Sept. 4.31-32p3)
• A8906   108906 2001 PL9 from McDonald Obs. (Sept. 4.32-33p3)
• 86666   86666 2000 FL10 from LINEAR (Sept. 4.33-38p5)
• 65690   65690 1991 DG from Kiev Comet Station (Aug. 27.88-90p3)
• 38239   38239 1999 OR3 from Spacewatch 0.9m (Sept. 4.41-44p3)
• 16960   16960 1998 QS52 from Taurus-1 Obs. (Sept. 2.00-03p29)
• 09058   9058 1992 JB from McDonald Obs. (Sept. 4.28-30p3)
• 08567   8567 1996 HW1 from Taurus-1 Obs. (Aug. 31.80-90p73 & Sept. 3.92-97p32)
• 01620   1620 Geographos (1951 RA) from Taurus-1 Obs. (Sept. 3.99-02p25)

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Observers  on 5 September '08

Twelve observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 5 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 5 September '08

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