Contents  on 2 September '08


The latest A/CC news is available via framed access, RSS news feed 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.

Radar Astrometry  on 2 September '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:

Data addition noted at 2001 UTC when the database was dated 2 Sept.

NEOCP Activity  on 2 September '08

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of eleven objects listed on the NEOCP at some point today.

New MPECs  on 2 September '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-R14 - "21:54 UT" - 1999 RJ27

MPEC 2008-R13 - "21:31 UT" - 2008 RC

MPEC 2008-R12 - "18:10 UT" - 2007 BA

MPEC 2008-R11 - "14:18 UT" - Comet P/2008 O3 (Boattini)

<< DOU on 2 Sept. '08 >>  MPEC 2008-R10 - "06:07 UT" - Daily Orbit Update

Observers  on 2 September '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 35107
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2008-R10 & 2008-R12 -- 2008 QT3, 2008 OX8, 2008 OS7, 2008 OP8, 2008 OO, 2008 NU, 2008 JZ30, 2008 JT35, 2007 BA, 2002 QY6
235CAST Obs. in Italy, 1 in MPEC 2008-R13 -- 2008 RC
B20Carmelita Obs. in Spain, 1 in MPEC 2008-R13 -- 2008 RC
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-R13 -- 2008 RC
355Hadano Obs. in Japan, 1 in MPEC 2008-R13 -- 2008 RC
246KLENOT in the Czech Republic, 1 in MPEC 2008-R10 -- 2008 QZ
585Kiev Comet Station in the Ukraine, 2 in MPEC 2008-R10 -- 2008 PL3, 65690
699LONEOS in Arizona, 16 in MPEC 2008-R10 -- 2007 YZ, 2007 SP6, 2007 FK1, 2003 UC20, 2003 GJ, 88188, 66272, 65679, 21374, 170891, 159518, 137805, 6063, 6050, 4487, 3102
J75La Sagra Obs. in Spain, 1 in MPEC 2008-R13 -- 2008 RC
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-R10 -- 2007 YM56
118Modra Obs. in Slovakia, 1 in MPEC 2008-R13 -- 2008 RC
H59Prairie Grass Obs. in Indiana, 1 in MPEC 2008-R13 -- 2008 RC
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-R13 -- 2008 RC
H36Sandlot Obs. in Kansas, 1 in MPEC 2008-R13 -- 2008 RC
E12Siding Spring Survey (SSS) in New South Wales, 9 in MPEC 2008-R10 -- 2008 QV11, 2008 QT11, 2008 QD1, 2008 QC1, 2008 QC, 2008 PH3, 2008 OX8, 2008 LN16, 2001 RT17
B40Skylive Obs. in Italy, 1 in MPEC 2008-R10 -- 8567
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-R14 -- 1999 RJ27
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-R11 -- P/2008 O3
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-R13 -- 2008 RC
B18Terskol Obs. in Russia, 2 in MPECs 2008-R13 & 2008-R14 -- 2008 RC, 1999 RJ27
H53Thompsonville Obs. in Illinois, 4 in MPEC 2008-R10 -- 39572, 164400, 8567, 4179
H83Timberlake Obs. in Virginia, 1 in MPEC 2008-R10 -- 90403
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 September '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2008 OOJPL Sentry1448R E M O V E DJPL: Risk listing removed at 0852 UTC.

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.

Chronology  on 2 September '08

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

2200Grabbed MPEC 2008-R13 - 2008 RC - see above
Grabbed MPEC 2008-R14 - 1999 RJ27 - see above
2001Noted Radar Astrometry database addition - see above
1827Grabbed MPEC 2008-R12 - 2007 BA - see above
1449Grabbed MPEC 2008-R10 - Daily Orbit Update - see above
Grabbed MPEC 2008-R11 - Comet P/2008 O3 (Boattini) - see above
1448Noted that JPL Sentry has removed 2008 OO as an impact risk - see above