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Contents  on 22 February '08

• IAU Minor Planet Center
  • NEOCP Activity -- three listings: 1 new, 2 updated
  • New MPECs -- two MPECs
  • Observers -- seven 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 22 February '08

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of four 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 22 February '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-D25 time-stamped "07:06 UT" - Daily Orbit Update - see below
• MPEC 2008-D26 time-stamped "19:34 UT" - 2008 DE

MPEC 2008-D26 - "19:34 UT" - 2008 DE

• K08D00E   2008 DE (risk-listed, Earth MOID=1.9 LD, H=19.3 ~467m) was discovered at 0749 UT on 19 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 12.31-32p4, 19.33-38p7, and 19.43-45p4. The discovery was confirmed by Astronomical Research Obs. (ARO) (Feb. 21.26-27p3).

<< DOU on 22 Feb. '08 >>  MPEC 2008-D25 - "07:06 UT" - Daily Orbit Update

• Observations of recently (no longer) risk-listed objects
• K08CB8R   2008 CR118 (arc=8 days, H=18.9 ~562m) from the Spacewatch 1.8m telescope (Feb. 13.25-26p3)
• K08C00K   2008 CK (small asteroid, arc=14 days, H=26.2 ~19m) from ARO (Feb. 16.38-40p2 at V=22.2-3)
• Observations of small asteroids (H>22.0)
• K08A04E   2008 AE4 (arc=37 days, H=23.9 ~56m) from ARO (Feb. 16.37p1 & 16.42p2)
• K07Y00F   2007 YF (arc=26 days, H=24.8 ~37m) from the Mt. Lemmon Survey (MLS) (Jan. 11.16-18p4 at V=22.1-3)
• Observations of other objects
• K08C01N   2008 CN1 (arc=17 days, H=20.6 ~257m) from Lumijoki Obs. (Feb. 14.05p4)
• K08A00E   2008 AE (arc=2 opp, H=19.6 ~407m) from Lumijoki Obs. (Feb. 13.99-00p4)
• K07V04Q   2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from La Fecha Obs. (Feb. 22.05-11p3)
• K07S02V   2007 SV2 (arc=145 days, H=21.2 ~195m) from the Spacewatch 0.9m telescope (Feb. 12.10-15p3)
• K05T45U   2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from La Fecha Obs. (Feb. 22.04-09p3)
• K05E70K   2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from La Fecha Obs. (Feb. 22.03-08p3)
• J99R33H   1999 RH33 from CSS (2005 Oct. 27.31-34p4)

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Observers  on 22 February '08

Seven observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 22 February '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 22 February '08

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