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Contents  on 10 April '08

• IAU Minor Planet Center
  • NEOCP Activity -- four listings: 1 new, 3 updated
  • New MPECs -- four MPECs
• Observers -- fourteen 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 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 10 April '08

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of six objects listed on the NEOCP at some point today.

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New MPECs  on 10 April '08

Minor Planet Electronic Circulars

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

• MPEC 2008-G61 time-stamped "06:09 UT" - Daily Orbit Update - see below
• MPEC 2008-G62 time-stamped "13:26 UT" - 2008 GL20 - see below
• MPEC 2008-G63 time-stamped "16:50 UT" - 2008 FN6 - see below
• MPEC 2008-G64 time-stamped "20:00 UT" - 2008 AB31

MPEC 2008-G64 - "20:00 UT" - 2008 AB31

• K08A31B   2008 AB31 (H=20.2 ~309m) from NEAT's Mt. Palomar telescope (2002 July 14.41-44p3, 2002 July 18.26p1, 2002 July 18.34p1, 2002 July 18.40p1 & 2002 July 22.36p1)

MPEC 2008-G63 - "16:50 UT" - 2008 FN6

• K08F06N   2008 FN6 (H=21.4 ~178m) from the Catalina Sky Survey (CSS) (April 7.43-45p4), Wildberg Obs. (April 7.89-91p5), and Altschwendt Obs. (April 7.98-99p3)

MPEC 2008-G62 - "13:26 UT" - 2008 GL20

• K08G20L   2008 GL20 (small asteroid, Earth MOID=2.6 LD, H=26.7 ~15m) was discovered at 0749 UT on 9 April by LINEAR, which observed it at April 9.33-37p5. The discovery was confirmed by Great Shefford Obs. (April 10.06-08p5), Alter Satzberg Obs. (April 10.10-12p4), and Sabino Canyon Obs. (April 10.38-39p3). This object is now within ten lunar distances (LD) of Earth, reaching 6.1 LD on 7 April.

<< DOU on 10 Apr. '08 >>  MPEC 2008-G61 - "06:09 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08G03R   2008 GR3 (small asteroid, arc=2 days, H=25.1 ~32m) from the Mt. Lemmon Survey (MLS) (April 9.31-32p2 at V=21.0-22.3)
• K08E05X   2008 EX5 (small asteroid, arc=33 days, H=23.8 ~59m) from Astronomical Research Obs. (ARO) (April 6.10-13p3 at V=23.0-2)
• Observations of recently (no longer) risk-listed objects
• K08G00F   2008 GF (arc=5 days, H=20.6 ~257m) from ARO (April 6.25-26p3)
• K08F07L   2008 FL7 (small asteroid, arc=6 days, H=24.5 ~43m) from ARO (April 6.39-41p3) and the Spacewatch 0.9m telescope (April 6.39-43p3)
• K08F06W   2008 FW6 (arc=9 days, H=21.0 ~214m) from ARO (April 6.28-29p3)
• K08F05W   2008 FW5 (arc=11 days, H=21.7 ~155m) from ARO (April 6.42-44p3)
• K08E05V   2008 EV5 (arc=36 days, H=20.0 ~339m) from ARO (April 6.06-08p3) and MLS (April 9.15-17p4 at V=20.9-22.1)
• Observations of small asteroids (H>22.0)
• K08G04B   2008 GB4 (arc=1 day, H=23.3 ~74m) from Great Shefford Obs. (April 9.87-88p4)
• K08G03X   2008 GX3 (arc=2 days, H=26.2 ~19m) from Great Shefford Obs. (April 9.85-86p2 & 9.95-96p2)
• K08G03S   2008 GS3 (arc=2 days, H=22.2 ~123m) from Remanzacco Obs. (April 7.88-90p2), Great Shefford Obs. (April 8.96-97p3), MLS (April 9.31-33p4), and Mt. John Obs. (April 9.56p4)
• K08G03P   2008 GP3 (arc=6 days, H=25.4 ~28m) from LINEAR (April 8.42-45p4), Great Shefford Obs. (April 9.05-06p3), and Mt. John Obs. (April 9.36p4)
• K08G02L   2008 GL2 (arc=3 days, H=27.1 ~13m) from Mt. John Obs. (April 9.46-47p4)
• K08G00Q   2008 GQ (arc=6 days, H=24.9 ~35m) from Mt. John Obs. (April 9.54-55p3)
• K08F05E   2008 FE5 (arc=12 days, H=22.1 ~129m) from ARO (April 6.12-14p6) and Mt. John Obs. (April 9.44-46p4)
• K08F00H   2008 FH (arc=12 days, H=24.3 ~47m) from ARO (April 6.22-23p3)
• K08D00X   2008 DX (arc=40 days, H=23.7 ~62m) from ARO (April 6.30-33p3 at V=22.3-5)
• Observations of other objects
• K08G03V   2008 GV3 (i=72.7°, arc=2 days, H=18.3 ~741m) from Mt. John Obs. (April 9.67-68p3)
• K08G03Q   2008 GQ3 (arc=2 days, H=18.9 ~562m) from Great Shefford Obs. (April 8.91-92p3)
• K08G00X   2008 GX (arc=5 days, H=19.4 ~446m) from ARO (April 6.23-24p3 & 7.26-27p3)
• K08G00D   2008 GD (q=0.264 AU, arc=7 days, H=19.9 ~355m) from ARO (April 6.21p3)
• K08E00G   2008 EG (q=0.246 AU, arc=39 days, H=20.0 ~339m) from Mt. John Obs. (April 9.35-36p4)
• K08D17G   2008 DG17 (i=41.1°, arc=40 days, H=19.8 ~371m) from Mt. John Obs. (April 9.32p4)
• K08C01N   2008 CN1 (arc=66 days, H=20.6 ~257m) from ARO (April 7.11-12p3)
• K08A31B   2008 AB31 (arc=88 days, H=20.2 ~309m) from Mt. John Obs. (April 9.33-34p4)
• K06K86V   2006 KV86 (i=37.1°, arc=2 opp, H=18.7 ~616m) from Mt. John Obs. (April 9.66-67p8)
• K06B55G   2006 BG55 (arc=3 opp, H=18.4 ~708m) from Schiaparelli Obs. (April 3.98-99p3)
• K05L19W   2005 LW19 (arc=2 opp, H=19.6 ~407m) from Mt. John Obs. (April 9.38-39p8)
• K05B00C   2005 BC (arc=2 opp, H=18.2 ~776m) from Mt. John Obs. (April 9.73-74p5)
• K03H22A   2003 HA22 (arc=3 opp, H=19.4 ~446m) from Spacewatch 0.9m (April 7.13-16p3)
• G2825   162825 2001 BO61 from MLS (April 9.12-14p8)
• G2173   162173 1999 JU3 from CSS (April 9.15-17p4)
• G2063   162063 1997 EH29 from MLS (April 9.36p4)
• G2039   162039 1996 JG from Spacewatch 0.9m (April 7.24-28p3)
• F4229   154229 2002 JN97 from Spacewatch 0.9m (April 7.45-47p2)
• F2679   152679 1998 KU2 from Spacewatch 0.9m (April 9.24-27p3)
• 85628   85628 1998 KV2 from LINEAR (April 9.33-38p5)
• 35107   35107 1991 VH from CSS (April 9.34-36p4)
• 13553   13553 1992 JE from MLS (April 9.27-29p4)
• 03288   3288 Seleucus (1982 DV) from CSS (April 9.12-14p4)

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Observers  on 10 April '08

Fourteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 10 April '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 10 April '08

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