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Contents  on 28 July '08

• IAU Minor Planet Center
  • NEOCP Activity -- five listings: 1 new, 4 updated
  • New MPECs -- four MPECs
• Observers -- fifteen 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 28 July '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seven 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 28 July '08

Minor Planet Electronic Circulars

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

• MPEC 2008-O36 time-stamped "06:07 UT" - Daily Orbit Update - see below
• MPEC 2008-O37 time-stamped "13:37 UT" - 2008 OO1 - see below
• MPEC 2008-O38 time-stamped "16:20 UT" - 2008 OX1 - see below
• MPEC 2008-O39 time-stamped "20:48 UT" - 2008 JA8

MPEC 2008-O39 - "20:48 UT" - 2008 JA8

• K08J08A   2008 JA8 (H=18.0 ~851m) from NEAT's Mt. Palomar telescope (2001 Sept. 7.47-50p3 & 2001 Oct. 7.51-54p3), NEAT's USAF Haleakala telescope (2001 Oct. 20.45-47p3), and Tiki Obs. (July 25.59p1 & 25.63p1)

MPEC 2008-O38 - "16:20 UT" - 2008 OX1

• K08O01X   2008 OX1 (H=21.4 ~178m) was discovered at 0618 UT on 28 July by the Mt. Lemmon Survey (MLS), which observed it at July 28.26-30p7 and 28.38p4. The discovery was confirmed by Moriyama Obs. (July 28.53-54p4) and the Siding Spring Survey (SSS) (July 28.54p2).

MPEC 2008-O37 - "13:37 UT" - 2008 OO1

• K08O01O   2008 OO1 (risk-listed, Earth MOID=6.4 LD, H=24.7 ~39m) was discovered at 1314 UT on 26 July by SSS, which observed it at July 26.55-58p4, 26.71p1, 26.81p1, and 27.64p1. The discovery was confirmed by Astronomical Research Obs. (ARO) (July 27.18-19p3), Great Shefford Obs. (July 28.06p1 & 28.10-13p4), and MLS (July 28.36-38p4). This object was within ten lunar distances (LD) of Earth, reaching 9.0 LD on 23 July.

<< DOU on 28 July '08 >>  MPEC 2008-O36 - "06:07 UT" - Daily Orbit Update

• Observations of risk-listed objects
• K08O00O   2008 OO (arc=2 days, H=19.7 ~389m) from Mallorca Obs. (July 26.94-01p9), ARO (July 27.17p3), and Moriyama Obs. (July 27.65p2)
• Observations of small asteroids (H>22.0)
• K08O00M   2008 OM (arc=3 days, H=22.4 ~112m) from SSS (July 27.70p1) and Great Shefford Obs. (July 28.11-12p2)
• Observations of other objects
• K08O00N   2008 ON (arc=2 days, H=20.3 ~295m) from SSS (July 27.71p1)
• K08N01S   2008 NS1 (Q=4.333 AU, arc=22 days, H=17.4 ~1.12 km) from SSS (July 27.37p1)
• K08M01U   2008 MU1 (i=40.8°, arc=27 days, H=19.7 ~389m) from ARO (July 27.20-21p5)
• K08M00Z   2008 MZ (Q=4.210 AU, arc=42 days, H=18.1 ~812m) from SSS (July 27.65p1)
• K08J14Q   2008 JQ14 (arc=83 days, H=19.2 ~490m) from ARO (July 27.14-16p4)
• K05R34C   2005 RC34 (arc=2 opp, H=19.7 ~389m) from Santa Mama Obs. (July 26.82-85p8), Hamamatsu-Yuto Obs. (July 27.47-51p8 & 27.58-60p8), and El Guijo Obs. (July 27.94-95p3)
• 90403   90403 2003 YE45 from El Guijo Obs. (July 27.98p3)
• 35107   35107 1991 VH from Vitebsk Obs. (July 26.83-85p8), Santa Mama Obs. (July 26.86-87p5), and Thompsonville Obs. (July 28.15p6)
• 11398   11398 1998 YP11 from Hamamatsu-Yuto Obs. (July 27.63-65p5) and Thompsonville Obs. (July 28.16-17p6)
• 08567   8567 1996 HW1 from Homburg-Erbach Obs. (July 25.95-99p3) and Hamamatsu-Yuto Obs. (July 27.66-67p4)
• 01917   1917 Cuyo (1968 AA) from El Guijo Obs. (July 28.04-05p3)

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Observers  on 28 July '08

Fifteen observing facilities appear in today's MPECs.

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Impact Risk Monitoring  on 28 July '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 28 July '08

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