Contents  on 12 September '13

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 12 September '13

No objects reported inside ten LD

No objects are reported to be within ten lunar distances (LD) of Earth today, and none are known to be coming in until mid-November.

This report was generated at 1449 UTC.

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 12 September '13

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 22 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 12 September '13

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 12 Sept. '13 >>  MPEC 2013-R82 - "06:05 UT" - Daily Orbit Update

Observers  on 12 September '13

Thirteen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2013-R82 -- 2013 QM10, 2013 QC11, 2011 UU106, 2008 DV
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-R82 -- 2013 QJ10
G32Elena Remote Obs., 1 in MPEC 2013-R82 -- 168378
Z81Estrella de Mar Obs., 1 in MPEC 2013-R82 -- 10115
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-R82 -- 2013 RE36
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-R82 -- 2008 CJ119
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-R82 -- 2013 RE6
608NEAT's USAF Haleakala telescope in Hawaii, 3 in MPEC 2013-R82 -- 255071, 234341, 217837
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-R82 -- 2011 SD173, 251346
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-R82 -- 2008 CJ119
Y00SONEAR Obs. in Brazil, 4 in MPEC 2013-R82 -- 86829, 185702, 140039, 3352
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2013-R82 -- 2013 QN17, 2013 QC11, 2013 PE26, 2013 PA7, 2013 GY7, 2010 AK2
A48Verona Obs. in Italy, 2 in MPEC 2013-R82 -- 2012 TS, 243147
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 September '13

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
2008 EM68JPL Sentry03402013-21105634.6e-06-5.77-6.280JPL: "Analysis based on 11 observations spanning .11019 days (2008-Mar-08.25164 to 2008-Mar-08.36183)." Diameter approximately 0.010 km. from mean, weighted H=27.5.

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 12 September '13

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

1449Generated Traffic Report
1447Grabbed MPEC 2013-R82 - Daily Orbit Update - see above
0340Noted that JPL Sentry has updated its 2008 EM68 risk assessment - see above