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Contents  on 30 December '07

• IAU Minor Planet Center
  • NEOCP Activity -- seven listings: 2 new, 5 updated
  • New MPECs -- two MPECs
  • Observers -- fifteen 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 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.

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NEOCP Activity  on 30 December '07

The MPC's NEO Confirmation Page has 7 listings: 2 new, 5 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and five updated listings. Of these, six 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.

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New MPECs  on 30 December '07

Minor Planet Electronic Circulars

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

• MPEC 2007-Y54 time-stamped "07:07 UT" - Daily Orbit Update - see below
• MPEC 2007-Y55 time-stamped "18:26 UT" - 2007 YX1

MPEC 2007-Y55 - "18:26 UT" - 2007 YX1

• K07Y01X   2007 YX1 (Q=4.542 AU, H=17.2 ~1.23 km) from NEAT's Mt. Palomar telescope (2002 Sept. 3.49p1, 2002 Sept. 12.51p1 & 2002 Oct. 3.24-30p3)

<< DOU on 30 Dec. '07 >>  MPEC 2007-Y54 - "07:07 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K07Y29V   2007 YV29 (arc=2 days, H=18.5 ~676m) from Great Shefford Obs. (Dec. 30.21p3)
• K07X11K   2007 XK11 (Q=4.508 AU, arc=24 days, H=19.2 ~490m) from KLENOT (Dec. 29.78-79p6)
• Observations of recently (no longer) risk-listed objects
• K07Y01N   2007 YN1 (small asteroid, Q=4.628 AU, arc=12 days, H=25.0 ~34m) from the Spacewatch 1.8m telescope (Dec. 29.38-39p2 & 30.15-16p2)
• K07Y00Z   2007 YZ (arc=12 days, H=19.8 ~371m) from Petit Jean Mtn. South Obs. (PJMSO) (Dec. 29.34-35p7) and Capannoli Obs. (Dec. 30.08p3)
• K07X16N   2007 XN16 (small asteroid, arc=19 days, H=25.5 ~27m) from Spacewatch 1.8m (Dec. 29.41-43p3)
• K07X16J   2007 XJ16 (arc=25 days, H=18.8 ~589m) from Spacewatch 1.8m (Dec. 30.17-18p3)
• Observations of small asteroids (H>22.0)
• K07Y01J   2007 YJ1 (arc=12 days, H=25.2 ~31m) from Spacewatch 1.8m (Dec. 29.45-46p3)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K07X03Q   2007 XQ3 (arc=25 days, H=22.0 ~135m) from Spacewatch 1.8m (Dec. 29.40-41p3)
• Observations of other objects
• K07Y01X   2007 YX1 (Q=4.542 AU, arc=69 days, H=17.2 ~1.23 km) from PJMSO (Dec. 29.07-08p5)
• K07Y01M   2007 YM1 (arc=12 days, H=20.8 ~234m) from KLENOT (Dec. 29.81p7)
• K07Y00H   2007 YH (arc=13 days, H=20.1 ~323m) from Madonna di Dossobuono Obs. (Dec. 27.95p3)
• K07X16H   2007 XH16 (arc=21 days, H=19.6 ~407m) from PJMSO (Dec. 29.04-05p9 & 30.03-04p9)
• K07W55F   2007 WF55 (arc=28 days, H=19.1 ~513m) from Madonna di Dossobuono Obs. (Dec. 19.92p3 & 27.93-94p3) and New Millennium Obs. (Dec. 28.92p2)
• K07VI9G   2007 VG189 (arc=46 days, H=19.1 ~513m) from Spacewatch 1.8m (Dec. 29.36-37p2)
• K07U06S   2007 US6 (arc=3 opp, H=18.3 ~741m) from Green Island Obs. (Dec. 28.68p1, 28.73p1 & 28.78p1)
• K07T15G   2007 TG15 (arc=82 days, H=19.5 ~426m) from New Millennium Obs. (Dec. 28.85-89p5)
• K07T08G   2007 TG8 (Q=4.306 AU, arc=107 days, H=18.6 ~645m) from New Millennium Obs. (Dec. 28.78-81p6)
• K07S06P   2007 SP6 (arc=99 days, H=18.2 ~776m) from PJMSO (Dec. 29.39-40p6)
• K07P11U   2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from CEAMIG-REA (Dec. 28.04-05p3)
• K05X08K   2005 XK8 (arc=2 opp, H=19.8 ~371m) from New Millennium Obs. (Dec. 28.86-89p5)
• K05X01D   2005 XD1 (arc=2 opp, H=19.2 ~490m) from New Millennium Obs. (Dec. 28.87-90p4) and PJMSO (Dec. 29.32p5)
• K05W56J   2005 WJ56 (arc=3 opp, H=17.9 ~891m) from Iturrieta Obs. (Dec. 28.89-92p3) and Iluro Obs. (Dec. 29.11p3)
• K05T45U   2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from PJMSO (Dec. 29.41p5)
• K03B84H   2003 BH84 (arc=2 opp, H=16.9 ~1.41 km) from New Millennium Obs. (Dec. 28.85-89p6)
• K02X04Y   2002 XY4 (i=43.1°, arc=3 opp, H=19.0 ~537m) from PJMSO (Dec. 29.33p6)
• J93T02Q   1993 TQ2 (arc=2 opp, H=20.0 ~339m) from Iturrieta Obs. (Dec. 28.85-87p3)
• H0903   170903 2004 WS2 from New Millennium Obs. (Dec. 28.85-88p6) and LINEAR (Dec. 29.20-24p3)
• H0502   170502 2003 WM7 from PJMSO (Dec. 29.08-09p5)
• F4347   154347 2002 XK4 from Iluro Obs. (Dec. 29.14-15p3)
• E3678   143678 2003 SA224 from New Millennium Obs. (Dec. 28.79-83p6) and Montana Blanca Obs. (Dec. 28.86-87p2)
• D7084   137084 1998 XS16 from New Millennium Obs. (Dec. 28.79-83p6) and Inastars Obs. (Dec. 29.69-70p3)
• 99935   99935 2002 AV4 from New Millennium Obs. (Dec. 28.79-82p6) and PJMSO (Dec. 29.09-10p5)
• 90403   90403 2003 YE45 from PJMSO (Dec. 29.33-34p5)
• 86324   86324 1999 WA2 from New Millennium Obs. (Dec. 28.79p2) and PJMSO (Dec. 29.10p5)
• 85804   85804 1998 WQ5 from New Millennium Obs. (Dec. 28.81-84p4)
• 66959   66959 1999 XO35 from LINEAR (Dec. 29.20-23p4)
• 21374   21374 1997 WS22 from New Millennium Obs. (Dec. 28.80-84p6)
• 20826   20826 2000 UV13 from New Millennium Obs. (Dec. 28.79-82p6)
• 18736   18736 1998 NU from New Millennium Obs. (Dec. 28.85-88p6)
• 04450   4450 Pan (1987 SY) from PJMSO (Dec. 29.43p5)
• 03288   3288 Seleucus (1982 DV) from Iluro Obs. (Dec. 29.02-03p3)
• 01862   1862 Apollo (1932 HA) from PJMSO (Dec. 29.41-42p5)

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Observers  on 30 December '07

Fifteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 30 December '07

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 30 December '07

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