Contents  on 1 September '10


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 1 September '10

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of nine listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 1 September '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-R04 - "22:32 UT" - 2010 RA

MPEC 2010-R03 - "22:30 UT" - 2010 QG2

MPEC 2010-R02 - "16:16 UT" - 2009 ME9

<< DOU on 1 Sept. '10 >>  MPEC 2010-R01 - "06:08 UT" - Daily Orbit Update

Observers  on 1 September '10

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2010-R01 & 2010-R02 -- 2010 PS65, 2010 PD57, 2010 OE22, 2010 OB, 2010 MR87, 2010 MF1, 2010 GS7, 2009 ME9
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-R04 -- 2010 RA
160Castelmartini Obs. in Italy, 1 in MPEC 2010-R04 -- 2010 RA
151Eschenberg Obs. in Switzerland, 1 in MPEC 2010-R04 -- 2010 RA
203GiaGa Obs. in Italy, 2 in MPEC 2010-R01 -- 2010 MF1, 5786
J95Great Shefford Obs. in England, 1 in MPEC 2010-R04 -- 2010 RA
B86Hagen Obs. in Germany, 1 in MPEC 2010-R04 -- 2010 RA
585Kiev Comet Station in the Ukraine, 1 in MPEC 2010-R01 -- 85989
704LINEAR in New Mexico, 3 in MPECs 2010-R01 & 2010-R03 -- 2010 QG2, 2007 TY18, 161998
J75La Sagra Obs. in Spain, 1 in MPEC 2010-R01 -- 7336
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2010-R04 -- 2010 RA
A13Naef Obs. in Switzerland, 2 in MPEC 2010-R01 -- 2006 BN6, 2000 PQ27
B38Santa Mama Obs. in Italy, 4 in MPEC 2010-R01 -- 2010 MF1, 2009 CQ5, 2007 VG189, 4055
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2010-R01 -- 2010 EH20, 2006 KL21, 2005 QC5, 2004 FU4
587Sormano Obs. in Italy, 2 in MPECs 2010-R03 & 2010-R04 -- 2010 RA, 2010 QG2
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2010-R01 -- 2010 ON101, 2010 OF101, 2010 NT1, 2010 HD33
A78Stia Obs. in Italy, 2 in MPEC 2010-R01 -- 2010 MF1, 237442
H53Thompsonville Obs. in Illinois, 2 in MPEC 2010-R01 -- 143381, 7336
I15Wishing Star Obs. in Rhode Island, 6 in MPEC 2010-R01 -- 2010 PY75, 2010 NW117, 2010 MF1, 2007 VG189, 161998, 152558
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 September '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
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
2010 QG2JPL Sentry23592051-2065142.6e-05-4.04-4.440JPL: "Analysis based on 10 observations spanning 1.5557 days (2010-Aug-31.37082 to 2010-Sep-01.92655)." Diameter approximately 0.053 km. from mean, weighted H=24.0.
2010 QE2NEODyS1511204317.65e-11-5.52-5.520NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2010/08/25.193 to 2010/08/31.794."
2010 PS65JPL Sentry1511210211.0e-06-6.14-6.140JPL: "Analysis based on 38 observations spanning 18.033 days (2010-Aug-13.29423 to 2010-Aug-31.327429)." Diameter approximately 0.040 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 1 September '10

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

2359Noted that JPL Sentry has posted 2010 QG2 as an impact risk - see above
2300Grabbed MPEC 2010-R03 - 2010 QG2 - see above
Grabbed MPEC 2010-R04 - 2010 RA - see above
1747Grabbed MPEC 2010-R02 - 2009 ME9 - see above
1511Noted that JPL Sentry has updated its 2010 PS65 risk assessment - see above
Noted that NEODyS has posted 2010 QE2 as an impact risk - see above
Grabbed MPEC 2010-R01 - Daily Orbit Update - see above