Contents  on 5 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 5 September '12

No objects reported inside ten LD

No objects are reported to be inside ten lunar distances (LD) of Earth today. Approaching next, radar target 2012 QG42 arrives inside ten LD on September 11th and 2010 JK1 on November 22nd.

This report was generated at 1618 UTC with follow-up in today's DOU MPEC for 2012 QG42.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 5 September '12

The MPC's NEO Confirmation Page has 1 listing

When last checked at 2015 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed. This was a "one nighter." So far The Tracking News has counted a total of five listings on the NEOCP 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 5 September '12

Minor Planet Electronic Circulars

As of last check at 2015 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 5 Sept. '12 >>  MPEC 2012-R09 - "06:02 UT" - Daily Orbit Update

Observers  on 5 September '12

Ten observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 24 in MPEC 2012-R09 -- 2012 QY14, 2012 QX17, 2012 QJ45, 2012 QJ2, 2012 QG49, 2012 QG42, 2012 QF42, 2012 QE50, 2012 QC18, 2012 QB17, 2012 PX, 2012 PS17, 2012 PP24, 2012 PG5, 2012 PC20, 2012 OO, 2012 NP, 2012 MN2, 2012 BC20, 2006 DY, 2005 RZ2, 2000 SD8, 329520, 214869
I63Cygnus Obs., 1 in MPEC 2012-R09 -- 2012 QG42
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-R09 -- 2012 QG42
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-R09 -- 2012 LK9, 2012 FG58
C23Olmen Obs. in Belgium, 1 in MPEC 2012-R09 -- 2012 QG42
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2012-R09 -- 2012 QG42, 2012 QE50, 2012 PS17, 2012 PG5, 2010 OS22
E12Siding Spring Survey (SSS) in New South Wales, 8 in MPEC 2012-R09 -- 2012 QJ45, 2012 QH49, 2012 QG42, 2012 QF42, 90403, 29075, 4954, 4769
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-R09 -- 2012 QG42
A92Urseanu Obs. in Romania, 1 in MPEC 2012-R09 -- 2012 QG42
718Wiggins Obs. in Utah, 2 in MPEC 2012-R09 -- 2012 QG42, 2012 QE50
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 September '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2015 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 Sentry1615210812.6e-07-6.09-6.090JPL: "Analysis based on 183 observations spanning 27.936 days (2012-Aug-07.35157 to 2012-Sep-04.287907)." Diameter approximately 0.079 km. from mean, weighted H=23.2.
NEODyS1615R E M O V E D-

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 5 September '12

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

1618Generated Traffic Report
1615Noted that JPL Sentry has updated its 2012 PX risk assessment - see above
Noted that NEODyS has removed 2012 PX as an impact risk - see above
Grabbed MPEC 2012-R09 - Daily Orbit Update - see above