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Contents  on 24 July '09

• IAU Minor Planet Center
  • NEOCP Activity -- none
  • New MPECs -- three MPECs
• Observers -- seventeen 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 24 July '09

The MPC's NEO Confirmation Page is currently empty

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

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New MPECs  on 24 July '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

• MPEC 2009-O27 time-stamped "06:07 UT" - Daily Orbit Update - see below
• MPEC 2009-O28 time-stamped "13:04 UT" - 2009 OB3 - see below
• MPEC 2009-O29 time-stamped "13:12 UT" - 2009 OC3

MPEC 2009-O29 - "13:12 UT" - 2009 OC3

• K09O03C   2009 OC3 was discovered at 0729 UT on 23 July by LINEAR, which observed it at July 23.31-35p5. The discovery was confirmed by Great Shefford Obs. (July 23.95-96p3), Schiaparelli Obs. (July 24.04p3), Tanti Obs. (July 24.22-23p3), Magdalena Ridge Obs. (MRO) (July 24.26-28p5 & 24.37-38p3), Cordell-Lorenz Obs. (July 24.33-38p5), and Sandlot Obs. (July 24.35-36p4).

MPEC 2009-O28 - "13:04 UT" - 2009 OB3

• K09O03B   2009 OB3 was discovered at 1800 UT on 22 July by the Siding Spring Survey (SSS), which observed it at July 22.75p2, 22.80-83p2, 23.70-71p2, and 23.81p1. The discovery was confirmed by K. Hills via RAS Obs. Moorook (July 23.74-77p6), Tanti Obs. (July 24.26-28p3), Rio Cuarto Obs. (July 24.37-38p3), and MRO (July 24.46p2).

<< DOU on 24 July '09 >>  MPEC 2009-O27 - "06:07 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K09O00F   2009 OF (arc=7 days, H=21.4 ~178m) from Astronomical Research Obs. (ARO) (July 23.16-17p3), Bootes Obs. (July 23.90-91p2), Mandi Obs. (July 23.90-91p3), Tanti Obs. (July 24.14-15p3), and MRO (July 24.23-24p5)
• Observations of recently (no longer) risk-listed objects
• K09N00A   2009 NA (Q=4.145 AU, arc=23 days, H=17.5 ~1.07 km) from ARO (July 23.31-32p5) and Bootes Obs. (July 24.01-02p2)
• K09M09B   2009 MB9 (Q=4.943 AU, arc=25 days, H=18.7 ~616m) from Rio Cuarto Obs. (July 24.05-06p3)
• Observations of almost-small asteroids (21.7<H<=22.0)
• K06T07U   2006 TU7 (arc=2 opp, H=21.9 ~141m) from SSS (July 23.61p2 & 23.82p2)
• Observations of other objects
• K09O00G   2009 OG (i=48.5°, q=0.382 AU, Q=5.079 AU, arc=6 days, H=16.1 ~2.04 km) from SSS (July 23.83p2) and El Condor Obs. (July 24.07p1 & 24.12-16p2)
• K09O00C   2009 OC (arc=2 opp, H=20.3 ~295m) from Verona Obs. (July 22.92-93p4)
• K09N00L   2009 NL (Q=4.746 AU, arc=10 days, H=19.9 ~355m) from ARO (July 23.30p4) and LINEAR (July 23.31-35p5)
• K09N00J   2009 NJ (arc=12 days, H=18.6 ~645m) from ARO (July 23.17-18p4) and Rio Cuarto Obs. (July 24.12-13p3)
• K09N00H   2009 NH (arc=12 days, H=18.8 ~589m) from ARO (July 23.24-26p4)
• K09N00E   2009 NE (q=0.361 AU, Q=4.987 AU, arc=4 opp, H=15.8 ~2.34 km) from Verona Obs. (July 23.85-86p4)
• K09M09C   2009 MC9 (arc=24 days, H=17.9 ~891m) from SSS (July 23.59-60p2), El Condor Obs. (July 24.05-09p2 & 24.14p1), and Rio Cuarto Obs. (July 24.18-19p3)
• K09M06Z   2009 MZ6 (arc=27 days, H=20.5 ~269m) from ARO (July 23.19-20p3)
• K09M06X   2009 MX6 (arc=30 days, H=19.1 ~513m) from ARO (July 23.09-10p4), LINEAR (July 23.15-20p5), and Rio Cuarto Obs. (July 24.08-09p3)
• K09M01L   2009 ML1 (arc=30 days, H=19.5 ~426m) from ARO (July 23.33-34p4)
• K09L00S   2009 LS (i=45.0°, arc=41 days, H=18.0 ~851m) from ARO (July 23.13-15p3)
• K09K22J   2009 KJ22 (arc=53 days, H=19.9 ~355m) from ARO (July 23.28-29p5)
• K09J01K   2009 JK1 (arc=125 days, H=19.9 ~355m) from Zonalunar Obs. (July 22.86-88p2)
• K05YC8X   2005 YX128 (arc=3 opp, H=18.9 ~562m) from LINEAR (July 23.32-36p4)
• K02U00X   2002 UX (arc=3 opp, H=17.9 ~891m) from LINEAR (July 23.16-20p5)
• K02L00V   2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Zonalunar Obs. (July 22.93p1), Verona Obs. (July 23.83-84p4), Atlante Obs. (July 23.87-89p3), and Mandi Obs. (July 23.87-89p4)
• L5442   215442 2002 MQ3 from LINEAR (July 23.15-20p5)
• J4386   194386 2001 VG5 from LINEAR (July 23.16-20p3)
• G3902   163902 2003 SW222 from LINEAR (July 23.26-30p5)
• E3651   143651 2003 QO104 from El Condor Obs. (July 24.05-08p2 & 24.13p1)
• 52768   52768 1998 OR2 from El Condor Obs. (July 24.06p1 & 24.10p1)
• 52762   52762 1998 MT24 from El Condor Obs. (July 23.99-00p2)
• 17274   17274 2000 LC16 from El Condor Obs. (July 24.13-17p3)
• 05620   5620 Jasonwheeler (1990 OA) from LINEAR (July 23.21-23p3)
• 01566   1566 Icarus (1949 MA) from SSS (July 23.74p1)

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Observers  on 24 July '09

Seventeen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 24 July '09

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 24 July '09

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