Contents  on 28 August '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.

NEOCP Activity  on 28 August '08

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." So far The Tracking News has counted a total of ten 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.

New MPECs  on 28 August '08

Minor Planet Electronic Circulars

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

MPEC 2008-Q53 - "22:15 UT" - 2005 FH

MPEC 2008-Q52 - "19:48 UT" - Comet C/2008 Q3 (Garradd)

MPEC 2008-Q51 - "19:42 UT" - Comet P/2008 Q2 (Ory)

MPEC 2008-Q50 - "14:28 UT" - 2008 QT11

MPEC 2008-Q49 - "13:50 UT" - 2008 QW11

MPEC 2008-Q48 - "13:47 UT" - 2008 QV11

MPEC 2008-Q47 - "13:42 UT" - 2008 QU11

MPEC 2008-Q46 - "13:37 UT" - 2008 QS11

<< DOU on 28 Aug. '08 >>  MPEC 2008-Q45 - "06:07 UT" - Daily Orbit Update

Observers  on 28 August '08

A total of 24 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-Q45 -- 2001 SW269
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-Q45, 2008-Q49, 2008-Q51 & 2008-Q53 -- 2008 QW11, 2008 QT3, 2008 QM2, 2008 QF, 2008 QC1, 2008 QA1, P/2008 Q2, 2008 OX1, 2008 OQ8, 2008 OP8, 2008 OO1, 2008 MH1, 2008 JZ30, 2008 JR26, 2008 GF, 2005 FH
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2008-Q45 -- 2008 QT3, 1620
113Drebach Obs. in Germany, 2 in MPECs 2008-Q47 & 2008-Q51 -- 2008 QU11, P/2008 Q2
J27El Guijo Obs. in Spain, 2 in MPEC 2008-Q45 -- 164400, 8567
151Eschenberg Obs. in Switzerland, 4 in MPEC 2008-Q45 -- 2008 QT3, 2005 RC34, 2004 SB56, 164400
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-Q47 -- 2008 QU11
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2008-Q48 -- 2008 QV11
185Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2008-Q51 -- P/2008 Q2
246KLENOT in the Czech Republic, 2 in MPECs 2008-Q45 & 2008-Q47 -- 2008 QU11, 2008 QT3
704LINEAR in New Mexico, 1 in MPEC 2008-Q47 -- 2008 QU11
J75La Sagra Obs. in Spain, 2 in MPEC 2008-Q45 -- 2003 RM, 162900
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2008-Q45 -- 2006 SD6, 190208
474Mt. John Obs. in New Zealand, 6 in MPECs 2008-Q46, 2008-Q47, 2008-Q48, 2008-Q50, 2008-Q51 & 2008-Q52 -- 2008 QV11, 2008 QU11, 2008 QT11, 2008 QS11, C/2008 Q3, P/2008 Q2
A13Naef Obs. in Switzerland, 1 in MPEC 2008-Q47 -- 2008 QU11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2008-Q45 -- 2008 NU, 2008 MR1, 2006 WZ2, 2005 RD34, 2005 RC34, 66008, 65690
473Remanzacco Obs. in Italy, 1 in MPEC 2008-Q47 -- 2008 QU11
H36Sandlot Obs. in Kansas, 2 in MPECs 2008-Q47 & 2008-Q51 -- 2008 QU11, P/2008 Q2
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-Q51 -- P/2008 Q2
E12Siding Spring Survey (SSS) in New South Wales, 8 in MPECs 2008-Q45, 2008-Q46, 2008-Q48, 2008-Q49, 2008-Q50 & 2008-Q52 -- 2008 QW11, 2008 QV11, 2008 QT11, 2008 QS11, C/2008 Q3, 2002 EA3, 1998 WZ6, 137199
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-Q51 -- P/2008 Q2
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2008-Q47 & 2008-Q49 -- 2008 QW11, 2008 QU11
B18Terskol Obs. in Russia, 1 in MPEC 2008-Q51 -- P/2008 Q2
H53Thompsonville Obs. in Illinois, 3 in MPEC 2008-Q45 -- 90403, 188452, 4179
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-Q49 -- 2008 QW11
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 August '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 QT11JPL Sentry16292100-210841.5e-09-7.46-7.850JPL: "Analysis based on 7 observations spanning .76515 days (2008-Aug-27.76274 to 2008-Aug-28.52789)." Diameter approximately 0.141 km. from mean, weighted H=21.9.
2008 QS11JPL Sentry16292011-21071892.6e-07-3.41-3.610JPL: "Analysis based on 15 observations spanning .82688 days (2008-Aug-27.63741 to 2008-Aug-28.46429)." Diameter approximately 0.409 km. from mean, weighted H=19.6.
2008 QT3NEODyS1540201616.32e-11-6.39-6.390NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2008/08/24.899 to 2008/08/27.982."
JPL Sentry15392016-206862.2e-09-5.09-5.430JPL: "Analysis based on 74 observations spanning 3.0837 days (2008-Aug-24.89792 to 2008-Aug-27.98159)." Diameter approximately 0.663 km. from mean, weighted H=18.5.
2008 OO1JPL Sentry1539210711.6e-07-6.85-6.850JPL: "Analysis based on 42 observations spanning 31.710 days (2008-Jul-26.55201 to 2008-Aug-27.26171)." Diameter approximately 0.041 km. from mean, weighted H=24.6.

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 28 August '08

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

2300Grabbed MPEC 2008-Q53 - 2005 FH - see above
2133Grabbed MPEC 2008-Q51 - Comet P/2008 Q2 (Ory) - see above
Grabbed MPEC 2008-Q52 - Comet C/2008 Q3 (Garradd) - see above
1629Noted that JPL Sentry has posted 2008 QS11 as an impact risk - see above
Noted that JPL Sentry has posted 2008 QT11 as an impact risk - see above
1540Noted that NEODyS has updated its 2008 QT3 risk assessment - see above
Grabbed MPEC 2008-Q45 - Daily Orbit Update - see above
Grabbed MPEC 2008-Q46 - 2008 QS11 - see above
Grabbed MPEC 2008-Q47 - 2008 QU11 - see above
Grabbed MPEC 2008-Q48 - 2008 QV11 - see above
Grabbed MPEC 2008-Q49 - 2008 QW11 - see above
Grabbed MPEC 2008-Q50 - 2008 QT11 - see above
1539Noted that JPL Sentry has updated its 2008 OO1 risk assessment - see above
Noted that JPL Sentry has updated its 2008 QT3 risk assessment - see above