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Contents  on 4 January '08

• IAU Minor Planet Center
  • NEOCP Activity -- one listing: 1 updated
  • New MPECs -- two MPECs
  • Observers -- sixteen 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 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 4 January '08

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. So far The Tracking News has counted a total of two 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 4 January '08

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 2008-A22 time-stamped "07:08 UT" - Daily Orbit Update - see below
• MPEC 2008-A23 time-stamped "13:48 UT" - 2008 AS

MPEC 2008-A23 - "13:48 UT" - 2008 AS

• K08A00S   2008 AS (Q=4.618 AU, H=18.2 ~776m) was discovered at 0320 UT on 1 Jan. by the Catalina Sky Survey (CSS), which observed it at Jan. 1.14-16p4 and 1.20-22p4. The discovery was confirmed by the Siding Spring Survey (SSS) (Nov. 10.51-54p4), Farra d'Isonzo Obs. (Jan. 1.77-79p2), the Mt. Lemmon Survey (MLS) (Jan. 3.09-11p4), and Mt. John Obs. (Jan. 4.41-43p3).

<< DOU on 4 Jan. '08 >>  MPEC 2008-A22 - "07:08 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08A00E   2008 AE (arc=3 days, H=19.6 ~407m) from Petit Jean Mtn. South Obs. (PJMSO) (Jan. 3.46-47p7), Mt. John Obs. (Jan. 3.52-53p3), and Wildberg Obs. (Jan. 4.04p5)
• K07Y56V   2007 YV56 (arc=3 days, H=21.0 ~214m) from PJMSO (Jan. 3.45-46p10)
• K07Y56S   2007 YS56 (small asteroid, arc=3 days, H=25.7 ~25m) from Mt. John Obs. (Jan. 3.48-50p5)
• Observations of recently (no longer) risk-listed objects
• K07Y00Z   2007 YZ (arc=17 days, H=19.7 ~389m) from PJMSO (Jan. 3.37-38p8) and Hamamatsu-Yuto Obs. (Jan. 3.51-54p5 & 3.68p1)
• K07X16J   2007 XJ16 (arc=25 days, H=18.8 ~589m) from Tim Spahr via Whipple Obs. (Dec. 18.30-33p2)
• Observations of small asteroids (H>22.0)
• K07Y56R   2007 YR56 (arc=3 days, H=25.9 ~22m) from Great Shefford Obs. (Jan. 2.84-86p4)
• K07Y01J   2007 YJ1 (arc=13 days, H=25.2 ~31m) from the Spacewatch 0.9m telescope (Dec. 30.40-43p3)
• K07X03O   2007 XO3 (arc=27 days, H=22.9 ~89m) from Spahr/Whipple (Dec. 18.24-25p2)
• K07W05D   2007 WD5 (Q=4.074 AU, arc=55 days, H=24.3 ~47m) from the Sloan Digital Sky Survey (SDSS) (Nov. 8.37p3)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K07X03Q   2007 XQ3 (arc=25 days, H=22.0 ~135m) from Spahr/Whipple (Dec. 18.28-30p2)
• Observations of other objects
• K07W03Q   2007 WQ3 (arc=74 days, H=20.9 ~224m) from Mt. John Obs. (Jan. 3.46-47p3)
• K07VI3R   2007 VR183 (Q=4.353 AU, arc=109 days, H=17.4 ~1.12 km) from El Leoncito Obs. (Dec. 20.13-15p3)
• K07V04Q   2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from PJMSO (Jan. 3.47-48p5)
• K07S06P   2007 SP6 (arc=2 opp, H=18.2 ~776m) from Eschenberg Obs. (Jan. 3.89-90p4)
• K07P11U   2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from El Leoncito Obs. (Dec. 20.15-17p3) and Hamamatsu-Yuto Obs. (Jan. 3.60-62p3)
• K06B07T   2006 BT7 (arc=3 opp, H=18.4 ~708m) from Spacewatch 0.9m (Dec. 30.47-50p3)
• K05W56J   2005 WJ56 (arc=3 opp, H=18.0 ~851m) from PJMSO (Jan. 3.41p5), Hamamatsu-Yuto Obs. (Jan. 3.80-82p9), and Eschenberg Obs. (Jan. 3.82p7)
• K05T45U   2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from El Leoncito Obs. (Dec. 20.26-27p3), Hamamatsu-Yuto Obs. (Jan. 2.71p2 & 3.73-79p8), and PJMSO (Jan. 3.43-45p5)
• K05C36Z   2005 CZ36 (arc=3 opp, H=17.5 ~1.07 km) from Spacewatch 0.9m (Dec. 30.26-28p2)
• K04Y05C   2004 YC5 (arc=2 opp, H=18.0 ~851m) from Spahr/Whipple (Dec. 18.46-50p2)
• K04H33K   2004 HK33 (arc=5 opp, H=17.6 ~1.02 km) from Spacewatch 0.9m (Dec. 31.42-45p3 at V=22.1)
• K03G00W   2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from Mt. John Obs. (Jan. 3.60-61p3)
• K02RB8C   2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from El Leoncito Obs. (Dec. 20.07-08p3) and SSS (Jan. 3.54-57p3)
• K00C59H   2000 CH59 (arc=3 opp, H=19.8 ~371m) from Greiner Research Obs. (Jan. 3.30p3)
• J99R28Q   1999 RQ28 (arc=2 opp, H=20.7 ~245m) from Spacewatch 0.9m (Dec. 30.47-50p3)
• J93T02Q   1993 TQ2 (arc=2 opp, H=20.0 ~339m) from PJMSO (Jan. 3.35-36p3)
• J89A00Z   1989 AZ (arc=3 opp, H=19.6 ~407m) from PJMSO (Jan. 3.09-11p6)
• H0903   170903 2004 WS2 from PJMSO (Jan. 3.16p5)
• H0891   170891 2004 TY16 from Hamamatsu-Yuto Obs. (Jan. 3.72p3)
• F4347   154347 2002 XK4 from PJMSO (Jan. 3.48-49p5)
• 99935   99935 2002 AV4 from PJMSO (Jan. 3.11-12p5)
• 90403   90403 2003 YE45 from PJMSO (Jan. 3.38p4)
• 68359   68359 2001 OZ13 from Hamamatsu-Yuto Obs. (Jan. 3.70p4)
• 66407   66407 1999 LQ28 from PJMSO (Jan. 3.49p5)
• 07977   7977 1977 QQ5 from El Leoncito Obs. (Dec. 20.24-26p3)
• 03288   3288 Seleucus (1982 DV) from Montana Blanca Obs. (Jan. 3.95p2)

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Observers  on 4 January '08

Sixteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 4 January '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 January '08

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