Contents  on 6 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 6 September '12

No objects reported inside ten LD

There are no objects reported passing within ten lunar distances (LD) of our planet today. Coming toward Earth next, radar target 2012 QG42 arrives inside ten LD on September 11th and 2010 JK1 arrives November 22nd.

This report was generated at 1504 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 6 September '12

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, one was a "one nighter."

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 6 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 6 Sept. '12 >>  MPEC 2012-R10 - "06:02 UT" - Daily Orbit Update

Observers  on 6 September '12

Seventeen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2012-R10 -- 2012 QY14, 2012 QX17, 2012 QJ45, 2012 QG49, 2012 QG42, 2012 QF42, 2012 QC18, 2012 QB17, 2012 PP28, 2012 PN28, 2012 PG5, 2012 PA20, 2012 MK6
I74Baxter Garden Obs., 2 in MPEC 2012-R10 -- 276397, 4487
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2012-R10 -- 2012 QW17, 2012 QH49, 2012 QD8, 2012 OU5, 2005 NK1
I63Cygnus Obs., 1 in MPEC 2012-R10 -- 2012 QG42
J95Great Shefford Obs. in England, 6 in MPEC 2012-R10 -- 2012 QQ50, 2012 QG49, 2012 QG42, 2012 QE50, 2012 PX, 2012 PP28
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-R10 -- 2004 SB56
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-R10 -- 2012 MQ
583Odessa-Mayaki Obs. in the Ukraine, 1 in MPEC 2012-R10 -- 4179
C23Olmen Obs. in Belgium, 1 in MPEC 2012-R10 -- 2012 QG42
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2012-R10 -- 2012 LU7, 52750, 206910, 163732
071Rhozen Obs. in Bulgaria, 1 in MPEC 2012-R10 -- 141056
H36Sandlot Obs. in Kansas, 4 in MPEC 2012-R10 -- 2012 QO10, 2012 QG49, 2001 QM142, 1994 EK
J84South Obs. in England, 1 in MPEC 2012-R10 -- 2012 QG42
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-R10 -- 2012 QG42
I76Tesla Obs. in Spain, 1 in MPEC 2012-R10 -- 2012 QG42
G56Walnut Creek Obs. in northern California, 2 in MPEC 2012-R10 -- 2012 QO10, 2012 QB17
718Wiggins Obs. in Utah, 2 in MPEC 2012-R10 -- 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 6 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 QD8NEODyS15032039-209063.1e-06-4.16-4.170NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2012-08-17.445 to 2012-09-04.985."
JPL Sentry15022042-205031.3e-05-3.56-3.680JPL: "Analysis based on 39 observations spanning 18.540 days (2012-Aug-17.44424 to 2012-Sep-04.98426)." Diameter approximately 0.083 km. from mean, weighted H=23.1.
2012 PXJPL Sentry1502210812.7e-07-6.06-6.060JPL: "Analysis based on 185 observations spanning 29.628 days (2012-Aug-07.35157 to 2012-Sep-05.97922)." Diameter approximately 0.079 km. from mean, weighted H=23.2.

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 6 September '12

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

1504Generated Traffic Report
1503Noted that NEODyS has updated its 2012 QD8 risk assessment - see above
1502Noted that JPL Sentry has updated its 2012 PX risk assessment - see above
Noted that JPL Sentry has updated its 2012 QD8 risk assessment - see above
Grabbed MPEC 2012-R10 - Daily Orbit Update - see above