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Contents  on 12 April '08

• IAU Minor Planet Center
  • NEOCP Activity -- none
  • New MPECs -- five MPECs
• Observers -- twelve 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 12 April '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were five listings noted earlier today.

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New MPECs  on 12 April '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2008-G68 time-stamped "06:09 UT" - Daily Orbit Update - see below
• MPEC 2008-G69 time-stamped "11:45 UT" - 2008 GU20 - see below
• MPEC 2008-G70 time-stamped "11:48 UT" - 2008 GV20 - see below
• MPEC 2008-G71 time-stamped "11:56 UT" - 2008 GW20 - see below
• MPEC 2008-G72 time-stamped "12:55 UT" - 2008 GB21

MPEC 2008-G72 - "12:55 UT" - 2008 GB21

• K08G21B   2008 GB21 (risk-listed, Earth MOID=0.8 LD, H=25.8 ~23m) was discovered at 0917 UT on 12 April by the Catalina Sky Survey (CSS), which observed it at April 12.39-45p8. The discovery was confirmed by Jim Young via Table Mtn. Obs. (April 12.48-49p4). This object is now within ten lunar distances (LD) of Earth, reaching 2.4 LD on 8 April.

MPEC 2008-G71 - "11:56 UT" - 2008 GW20

• K08G20W   2008 GW20 (borderline-small, Earth MOID=5.6 LD, H=21.8 ~148m) was discovered at 0855 UT on 11 April by CSS, which observed it at April 11.37-40p4 and 11.45-47p3. The discovery was confirmed by Bisei Spaceguard Center (April 11.79p5), CEAMIG-REA (April 12.24-25p3), Sabino Canyon Obs. (April 12.35p3), Young/Table Mtn. (April 12.39-40p4), and the Mt. Lemmon Survey (MLS) (April 12.41-42p8). This object was within ten lunar distances (LD) of Earth, reaching 6.0 LD on 5 April.

MPEC 2008-G70 - "11:48 UT" - 2008 GV20

• K08G20V   2008 GV20 (H=18.7 ~616m) was discovered at 0716 UT on 11 April by MLS, which observed it at April 11.30-32p4, 11.36-38p4, and 12.27-29p3.

MPEC 2008-G69 - "11:45 UT" - 2008 GU20

• K08G20U   2008 GU20 (small asteroid, H=23.0 ~85m) was discovered at 0616 UT on 11 April by CSS, which observed it at April 11.26-31p7. The discovery was confirmed by Tiki Obs. (April 11.42-44p2), MLS (April 12.22-24p4), Young/Table Mtn. (April 12.25-26p4), and the Spacewatch 1.8m telescope (April 12.33-34p3).

<< DOU on 12 Apr. '08 >>  MPEC 2008-G68 - "06:09 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08G02M   2008 GM2 (small asteroid, arc=5 days, H=28.3 ~7m) from Spacewatch 1.8m (April 11.37-38p3)
• Observations of recently (no longer) risk-listed objects
• K08F06T   2008 FT6 (arc=12 days, H=17.6 ~1.02 km) from the Spacewatch 0.9m telescope (April 6.35-38p3)
• Observations of small asteroids (H>22.0)
• K08G20L   2008 GL20 (arc=1 day, H=26.7 ~15m) from Mt. John Obs. (April 10.48-49p4)
• K08G04B   2008 GB4 (arc=3 days, H=23.3 ~74m) from Young/Table Mtn. (April 12.15-16p4)
• K08F06S   2008 FS6 (arc=13 days, H=22.4 ~112m) from Spacewatch 0.9m (April 6.30-33p3), Spacewatch 1.8m (April 11.42-43p3), and Tiki Obs. (April 11.56-63p3)
• K08F00O   2008 FO (arc=13 days, H=23.2 ~78m) from Spacewatch 1.8m (April 8.13-14p3 & 9.14-15p3)
• Observations of other objects
• K08G20P   2008 GP20 (arc=2 days, H=19.6 ~407m) from CSS (April 11.37-39p4) and Young/Table Mtn. (April 12.23-24p4)
• K08G04A   2008 GA4 (arc=3 days, H=19.1 ~513m) from Spacewatch 1.8m (April 11.43-44p3)
• K08G03Q   2008 GQ3 (Q=4.157 AU, arc=5 days, H=18.8 ~589m) from Young/Table Mtn. (April 12.13-15p4)
• K08E85M   2008 EM85 (arc=28 days, H=19.7 ~389m) from CSS (April 7.29-31p4) and Petit Jean Mtn. South Obs. (PJMSO) (April 11.32-33p6)
• K08D05J   2008 DJ5 (arc=39 days, H=19.9 ~355m) from Spacewatch 0.9m (April 7.14-17p3)
• K08D00E   2008 DE (arc=59 days, H=19.4 ~446m) from PJMSO (April 11.38-40p7)
• K08CB6M   2008 CM116 (arc=2 opp, H=17.4 ~1.12 km) from MLS (April 6.24-27p4)
• K08C23P   2008 CP23 (arc=67 days, H=19.5 ~426m) from CSS (April 8.21-24p4)
• K07V04Q   2007 VQ4 (arc=3 opp, H=15.9 ~2.24 km, q=1.271 AU) from PJMSO (April 11.35-37p5)
• K06K89E   2006 KE89 (i=45.1°, q=0.211 AU, arc=4 opp, H=16.5 ~1.70 km) from CSS (April 11.45-47p4)
• K06B55G   2006 BG55 (arc=3 opp, H=18.4 ~708m) from PJMSO (April 11.31p4)
• K05G21P   2005 GP21 (arc=2 opp, H=19.9 ~355m) from MLS (April 11.27-29p4)
• K04V14W   2004 VW14 (arc=4 opp, H=19.4 ~446m) from CSS (April 11.45-47p4)
• K04C02R   2004 CR2 (arc=2 opp, H=19.3 ~467m) from CSS (April 11.22-23p4)
• K00DA7P   2000 DP107 (arc=6 opp, H=18.2 ~776m) from CSS (April 11.16-18p4) and MLS (April 11.17-19p4)
• J99S05O   1999 SO5 (arc=2 opp, H=20.9 ~224m) from MLS (April 11.14-16p4)
• F4988   154988 2004 XN35 from PJMSO (April 11.34-35p6)
• E1531   141531 2002 GB from PJMSO (April 11.37p5)
• A2873   102873 1999 WK11 from CSS (April 11.34-36p4)
• 68278   68278 2001 FC7 from Spacewatch 0.9m (April 11.43-47p3)
• 24445   24445 2000 PM8 from Spacewatch 0.9m (April 11.33-36p3)
• 11398   11398 1998 YP11 from Urseanu Obs. (March 23.88p1)
• 06037   6037 1988 EG from MLS (April 11.17-19p4)
• 05836   5836 1993 MF from CSS (April 11.30-33p4)

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Observers  on 12 April '08

Twelve observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 12 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 12 April '08

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