Contents  on 2 September '12

Asteroid/Comet Connection (A/CC) Resources:

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.

Traffic Report  on 2 September '12

Report not compiled yet

No Traffic Report was compiled for this day. No objects were known to be within ten lunar distances of Earth. Click on the arrows immediately above for the previous and following day's reports.

NEOCP Activity  on 2 September '12

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, two were "one nighters."

New MPECs  on 2 September '12

Minor Planet Electronic Circulars

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

<< DOU on 2 Sept. '12 >>  MPEC 2012-R02 - "06:02 UT" - Daily Orbit Update

Observers  on 2 September '12

Six observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPEC 2012-R02 -- 2012 QH49, 2012 PX, 2012 NP, 2012 LU7, 2012 LE11, 2012 BZ76, 2007 RT19, 2005 UC, 2001 QG142, 2000 SD8, 1998 QC1, 96536, 52387, 335746, 333889, 333358, 329340, 326732, 219071, 138847, 105140, 9202, 5646, 5587, 4769, 4179
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPEC 2012-R02 -- 2012 QY14, 2012 QX17, 2012 QH8, 2012 QH49, 2012 QF49, 2012 PN6, 2012 LU7, 2012 KK18, 2012 JR17, 2012 FM52, 2010 MN51, 2005 SS4, 7350, 6569
448Desert Moon Obs. in New Mexico, 5 in MPEC 2012-R02 -- 2012 LU7, 52381, 303262, 141056, 7888
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-R02 -- 2012 EW14
204Schiaparelli Obs. in Italy, 7 in MPEC 2012-R02 -- 2012 QJ2, 2012 PS17, 2012 PP24, 2012 PP17, 2006 WN1, 335746, 333888
J84South Obs. in England, 1 in MPEC 2012-R02 -- 2012 QG42
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 September '12

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 CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2012 PXJPL Sentry15562067-210831.7e-06-5.27-5.330JPL: "Analysis based on 175 observations spanning 23.875 days (2012-Aug-07.35157 to 2012-Aug-31.22646)." Diameter approximately 0.079 km. from mean, weighted H=23.2.
NEODyS15562100-210019.85e-08-6.47-6.470NEODyS: "Based on 176 optical observations (of which 3 are rejected as outliers) from 2012-08-07.352 to 2012-08-31.227."

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 '12

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

1556Noted that JPL Sentry has updated its 2012 PX risk assessment - see above
Noted that NEODyS has updated its 2012 PX risk assessment - see above
Grabbed MPEC 2012-R02 - Daily Orbit Update - see above