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Contents  on 4 September '08

• IAU Minor Planet Center
  • NEOCP Activity -- six listings: 1 new, 5 updated
  • New MPECs -- five MPECs
• Observers -- seventeen observing facilities
• Impact Risk Monitoring -- one object
• 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 4 September '08

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and five updated listings. Of these, five were "one nighters." So far The 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.

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

New MPECs  on 4 September '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-R20 time-stamped "03:41 UT" - 2008 NW4, 2008 OG19 - see below
• MPEC 2008-R21 time-stamped "06:08 UT" - Daily Orbit Update - see below
• MPEC 2008-R22 time-stamped "17:06 UT" - Comet C/2008 R1 (Garradd) - see below
• MPEC 2008-R23 time-stamped "21:11 UT" - 2008 RE1 - see below
• MPEC 2008-R24 time-stamped "22:22 UT" - 1998 SD9

MPEC 2008-R24 - "22:22 UT" - 1998 SD9

• J98S09D   1998 SD9 (small asteroid, q=0.348 AU, Earth MOID=3.7 LD, H=24.0 ~54m) from LINEAR (Aug. 30.33-38p5 & Sept. 4.25-30p5) and Skylive Obs. (Sept. 4.90-91p5)

MPEC 2008-R23 - "21:11 UT" - 2008 RE1

• K08R01E   2008 RE1 (small asteroid, H=22.7 ~98m) was discovered at 1550 UT on 2 Sept. by the Siding Spring Survey (SSS), which observed it at Sept. 2.58-61p4, 2.66-67p4, and 2.77-78p6. The discovery was confirmed by CEAMIG-REA (Sept. 4.14p2) and Jim Young via Table Mtn. Obs. (Sept. 4.35-36p2).

MPEC 2008-R22 - "17:06 UT" - Comet C/2008 R1 (Garradd)

• CK08R010   C/2008 R1 (Garradd) (i=19.0°, q=1.705 AU, TP=2008 Nov. 8.969 TT) from SSS (Sept. 2.50-57p7 & 2.66p1), Grove Creek Obs. (Sept. 2.71-75p6 & 2.79p1), and CEAMIG-REA (Sept. 4.07-08p2)

<< DOU on 4 Sept. '08 >>  MPEC 2008-R21 - "06:08 UT" - Daily Orbit Update

• Observations of recently (no longer) risk-listed objects
• K08Q00Y   2008 QY (arc=13 days, H=18.5 ~676m) from the Spacewatch 1.8m telescope (Sept. 3.40-41p2)
• K08O13N   2008 ON13 (Q=4.020 AU, arc=34 days, H=19.9 ~355m) from Astronomical Research Obs. (ARO) (Sept. 3.17-20p3 at V=22.0-22.1)
• Observations of small asteroids (H>22.0)
• K08Q11U   2008 QU11 (arc=8 days, H=25.5 ~27m) from ARO (Sept. 3.17-18p3)
• K08Q01A   2008 QA1 (arc=11 days, H=22.5 ~107m) from ARO (Sept. 3.26-27p6)
• K08P01E   2008 PE1 (arc=33 days, H=24.2 ~49m) from ARO (Sept. 3.21-23p3 at V=21.9-22.2)
• K08O00M   2008 OM (arc=39 days, H=22.2 ~123m) from ARO (Sept. 1.13-16p3)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K08Q00F   2008 QF (arc=13 days, H=21.8 ~148m) from ARO (Sept. 3.14-16p4)
• Observations of other objects
• K08Q00Z   2008 QZ (arc=12 days, H=20.5 ~269m) from Spacewatch 1.8m (Sept. 3.29-30p3)
• K08N00U   2008 NU (Q=4.202 AU, arc=64 days, H=17.6 ~1.02 km) from ARO (Sept. 3.28-29p4)
• K08M01R   2008 MR1 (arc=3 opp, H=18.4 ~708m) from La Sagra Obs. (Sept. 3.11-14p3)
• K08M01H   2008 MH1 (Q=4.262 AU, arc=65 days, H=18.4 ~708m) from ARO (Sept. 1.06-07p6)
• K08J26R   2008 JR26 (arc=111 days, H=19.9 ~355m) from ARO (Sept. 1.07-09p3)
• K08J07Z   2008 JZ7 (Q=4.382 AU, arc=119 days, H=18.6 ~645m) from ARO (Sept. 1.10p3)
• K05O01U   2005 OU1 (arc=4 opp, H=20.1 ~323m) from ARO (Sept. 3.30-32p4)
• K05E60A   2005 EA60 (arc=4 opp, H=19.4 ~446m) from Spacewatch 1.8m (Sept. 3.37-38p3)
• K05B02Y   2005 BY2 (arc=3 opp, H=20.3 ~295m) from Spacewatch 1.8m (Sept. 3.35-36p3)
• K04A00E   2004 AE (arc=3 opp, H=20.7 ~245m) from Spacewatch 1.8m (Sept. 3.27-28p3)
• K03G00W   2003 GW (i=49.4°, arc=3 opp, H=16.8 ~1.48 km) from Posadas Obs. (Sept. 2.92-93p3)
• K02V94Y   2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from Spacewatch 1.8m (Sept. 3.38-40p3)
• K02T70B   2002 TB70 (arc=2 opp, H=21.7 ~155m) from Spacewatch 1.8m (Sept. 3.23-24p3)
• K02S00P   2002 SP (q=0.361 AU, arc=3 opp, H=20.7 ~245m) from ARO (Sept. 3.32-33p2)
• K01XQ6W   2001 XW266 (arc=3 opp, H=19.5 ~426m) from David Tholen's team on Mauna Kea (Aug. 13.25p2)
• K01S10G   2001 SG10 (arc=5 opp, H=20.5 ~269m) from Spacewatch 1.8m (Sept. 3.48p2)
• K00U11G   2000 UG11 (arc=2 opp, H=20.4 ~282m) from Spacewatch 1.8m (Sept. 3.21-22p3)
• K00CA1O   2000 CO101 (arc=2 opp, H=19.1 ~513m) from Spacewatch 1.8m (Sept. 3.49-50p3)
• J99R27J   1999 RJ27 (arc=2 opp, H=19.5 ~426m) from the Spacewatch 0.9m telescope (Sept. 3.25-29p3)
• G4400   164400 2005 GN59 from Crni Vrh Obs. (Sept. 2.98-01p4)
• G3000   163000 2001 SW169 from La Sagra Obs. (Sept. 3.15-19p3)
• 39572   39572 1993 DQ1 from Posadas Obs. (Sept. 2.90-91p3)
• 35107   35107 1991 VH from Ondrejov Obs. (July 27.86-99p7)
• 08567   8567 1996 HW1 from Posadas Obs. (Sept. 2.94-95p3)
• 05011   5011 Ptah (6743 P-L) from La Sagra Obs. (Sept. 3.07-09p3)
• 04179   4179 Toutatis (1989 AC) from Kiev Comet Station (Aug. 27.90-92p8)
• 03352   3352 McAuliffe (1981 CW) from La Sagra Obs. (Sept. 3.07-10p6)

MPEC 2008-R20 - "03:41 UT" - 2008 NW4, 2008 OG19

• K08O19G   2008 OG19 (KBO, q=40.202 AU, Q=49.108 AU, H=5.8 ~234 km) was discovered at 0453 UT on 30 July from Mt. Palomar, where it was observed at July 30.20p1, 30.25p1, 31.21p1, 31.25p1, Aug. 6.18p1, 6.24p1, 6.29p1, and 6.35p1. The discovery was confirmed by Cerro Tololo Inter-American Obs. (CTIO) (Aug. 22.99p1 & 23.05p1).
• K08N04W   2008 NW4 (KBO, q=37.044 AU, Q=50.534 AU, H=5.8 ~234 km) was discovered at 0722 UT on 7 July from Mt. Palomar, where it was observed at July 7.31p1, 7.35p1, 8.33-37p2, 9.33p1, 23.24p1, 23.30p1, 23.35p1, Aug. 7.18p1, 7.25p1, and 7.29p1. The discovery was confirmed by CTIO (Aug. 23.00p1 & 23.07p1).

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Observers  on 4 September '08

Seventeen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 4 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 4 September '08

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