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Contents  on 21 March '08

• IAU Minor Planet Center
  • NEOCP Activity -- two listings: 2 updated
  • New MPECs -- eight MPECs
• Observers -- eleven 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.

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NEOCP Activity  on 21 March '08

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

When last checked at 2353 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Both of these 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.

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

New MPECs  on 21 March '08

Minor Planet Electronic Circulars

As of last check at 2353 UTC, there have been eight MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-F14 time-stamped "06:06 UT" - Daily Orbit Update - see below
• MPEC 2008-F15 time-stamped "10:55 UT" - 2006 RG7 - see below
• MPEC 2008-F16 time-stamped "14:45 UT" - Observable Comets - see below
• MPEC 2008-F17 time-stamped "15:22 UT" - Distant Minor Planets - see below
• MPEC 2008-F18 time-stamped "15:29 UT" - Atens and Apollos - see below
• MPEC 2008-F19 time-stamped "15:29 UT" - Amors - see below
• MPEC 2008-F20 time-stamped "15:29 UT" - Unusual Minor Planets - see below
• MPEC 2008-F21 time-stamped "15:29 UT" - PHAs

MPEC 2008-F21 - "15:29 UT" - PHAs

MPEC 2008-F20 - "15:29 UT" - Unusual Minor Planets

MPEC 2008-F19 - "15:29 UT" - Amors

MPEC 2008-F18 - "15:29 UT" - Atens and Apollos

MPEC 2008-F17 - "15:22 UT" - Distant Minor Planets

MPEC 2008-F16 - "14:45 UT" - Observable Comets

MPEC 2008-F15 - "10:55 UT" - 2006 RG7

• K06R07G   2006 RG7 (H=18.9 ~562m) from David Tholen's team on Mauna Kea (Feb. 27.56p2 at R=22.9 & March 13.60-61p2 at R=22.5-6)

<< DOU on 21 Mar. '08 >>  MPEC 2008-F14 - "06:06 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08E69C   2008 EC69 (Q=4.457 AU, arc=31 days, H=17.0 ~1.35 km) from the Catalina Sky Survey (CSS) (Feb. 18.47-49p4), Astronomical Research Obs. (ARO) (March 20.36p3), and Desert Moon Obs. (March 20.48-49p3)
• K08A04F   2008 AF4 (arc=70 days, H=19.7 ~389m) from Magdalena Ridge Obs. (MRO) (March 20.35-37p3)
• Observations of recently (no longer) risk-listed objects
• K08E69D   2008 ED69 (i=36.3°, Q=5.076 AU, arc=9 days, H=16.7 ~1.55 km) from ARO (March 20.36-37p3) and Desert Moon Obs. (March 20.43-46p3)
• K08E32G   2008 EG32 (small asteroid, arc=1 day, H=27.1 ~13m) from CSS (March 12.30p1)
• K08E00H   2008 EH (small asteroid, arc=19 days, H=22.6 ~102m) from Desert Moon Obs. (March 20.22-29p3)
• Observations of small asteroids (H>22.0)
• K08E84X   2008 EX84 (arc=8 days, H=22.3 ~117m) from ARO (March 20.21p3)
• Observations of other objects
• K08E85M   2008 EM85 (arc=7 days, H=19.7 ~389m) from Greiner Research Obs. (GRO) (March 20.21-22p9), ARO (March 20.31-32p3), Jim Young via Table Mtn. Obs. (March 20.34-36p4), Trieste Obs. (March 20.87p4), and Verona Obs. (March 20.90p4)
• K08E32B   2008 EB32 (arc=10 days, H=19.2 ~490m) from ARO (March 20.23-24p3)
• K08A00E   2008 AE (arc=2 opp, H=19.7 ~389m) from Trieste Obs. (March 18.00-01p4) and Petit Jean Mtn. South Obs. (PJMSO) (March 20.25-28p6)
• K07V04Q   2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from PJMSO (March 20.29-30p5) and Trieste Obs. (March 20.88-89p3)
• K06H05X   2006 HX5 (arc=2 opp, H=19.4 ~446m) from Desert Moon Obs. (March 20.33-39p3)
• K05N07B   2005 NB7 (arc=3 opp, H=18.6 ~645m) from Desert Moon Obs. (March 20.19-20p2)
• K05B02E   2005 BE2 (arc=2 opp, H=18.2 ~776m) from Verona Obs. (March 20.92-93p4)
• H1839   171839 2001 JM1 from Desert Moon Obs. (March 20.10-16p3)
• 53319   53319 1999 JM8 from PJMSO (March 20.35-36p5) and Desert Moon Obs. (March 20.51-52p5)
• 11398   11398 1998 YP11 from Aljaraque Obs. (March 20.96-98p5)
• 03691   3691 Bede (1982 FT) from Aljaraque Obs. (March 21.01-04p5)
• 01866   1866 Sisyphus (1972 XA) from PJMSO (March 20.30-31p5)

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Observers  on 21 March '08

Eleven observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 21 March '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 21 March '08

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