Contents  on 31 July '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 31 July '13

One object reported inside ten LD

There is one asteroid reported inside ten lunar distances (LD) of our planet today. 2003 DZ15 exits ten LD, traveling from 9.60 to 11.08 LD. Next known to come this close is 277475 2005 WK4, which arrives inside ten LD on August 6th.

This report was generated at 1440 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 31 July '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. So far The Tracking News has counted a total of eight 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 31 July '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 31 July '13 >>  MPEC 2013-O64 - "06:02 UT" - Daily Orbit Update

Observers  on 31 July '13

Thirteen observers appear in today's MPEC.

CodeObserver / observatory
I99Blanquita Obs. in Spain, 4 in MPEC 2013-O64 -- 85804, 340666, 153349, 105140
B50Corner Obs. in Germany, 1 in MPEC 2013-O64 -- 285263
E103program code 3 via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-O64 -- 2013 KN6
157Frasso Sabino Obs. in Italy, 3 in MPEC 2013-O64 -- 2012 VN82, 2010 UX95, 17188
K93LCOGT Sutherland C in South Africa, 2 in MPEC 2013-O64 -- 52760, 232691
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2013-O64 -- 2013 LF16
A13Naef Obs. in Switzerland, 1 in MPEC 2013-O64 -- 2013 NH10
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-O64 -- 26166
B38Santa Mama Obs. in Italy, 3 in MPEC 2013-O64 -- 140039, 137170, 11405
291Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2013-O64 -- 2013 OW2, 2013 OQ3, 2013 OO2, 2013 OH, 2013 NV, 2013 NJ, 2013 NG6, 2013 MS11, 2013 MR, 2013 ML3, 2013 KF6, 2013 BK18
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-O64 -- 2013 OH
A16Tentlingen Obs. in Switzerland, 2 in MPEC 2013-O64 -- 2011 DL19, 2007 XY9
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-O64 -- 2013 OD4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 July '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
2013 ML3NEODyS1437R E M O V E D-
JPL Sentry1437R E M O V E DJPL: Risk listing removed at 0952 UTC.

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 31 July '13

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

1440Generated Traffic Report
1437Noted that JPL Sentry has removed 2013 ML3 as an impact risk - see above
Noted that NEODyS has removed 2013 ML3 as an impact risk - see above
Grabbed MPEC 2013-O64 - Daily Orbit Update - see above