Contents  on 1 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 1 July '13

No objects reported inside ten LD

There are no objects reported moving inside ten lunar distances (LD) of Earth today, and none are known to be coming in until late this month.

This report was generated at 1326 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 1 July '13

The MPC's NEO Confirmation Page has 24 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 25 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 1 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 1 July '13 >>  MPEC 2013-N01 - "06:02 UT" - Daily Orbit Update

Observers  on 1 July '13

Sixteen observers appear in today's MPEC.

CodeObserver / observatory
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-N01 -- 2013 MZ5
B92Chinon Obs. in France, 1 in MPEC 2013-N01 -- 17188
J19El Maestrat Obs. in Spain, 1 in MPEC 2013-N01 -- 163249
Z81Estrella de Mar Obs., 2 in MPEC 2013-N01 -- 2013 ML3, 2013 LK31
C73Galati Obs. in Romania, 2 in MPEC 2013-N01 -- 2013 MH7, 9950
203GiaGa Obs. in Italy, 2 in MPEC 2013-N01 -- 2013 LK31, 17188
585Kiev Comet Station in the Ukraine, 1 in MPEC 2013-N01 -- 163249
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-N01 -- 2013 LZ28, 2013 LX28
C91Montevenere Obs., 1 in MPEC 2013-N01 -- 285263
A13Naef Obs. in Switzerland, 1 in MPEC 2013-N01 -- 155341
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2013-N01 -- 2013 MD6, 2013 LV28, 285263, 159609
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-N01 -- 2002 LT24
C95SATINO-1 in France, 4 in MPEC 2013-N01 -- 2007 XY9, 2002 LT24, 163249, 137199
204Schiaparelli Obs. in Italy, 3 in MPEC 2013-N01 -- 2013 MR6, 2013 ML3, 2007 XY9
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2013-N01 -- 2013 MD6, 2013 LZ28, 2013 LK7, 2013 LH16, 2013 JQ22
A48Verona Obs. in Italy, 1 in MPEC 2013-N01 -- 2013 LN31
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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 ML3JPL Sentry1323210942.5e-06-4.64-5.000JPL: "Analysis based on 109 observations spanning 11.733 days (2013-Jun-19.27039 to 2013-Jul-01.002983)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
NEODyS13232103-210959.07e-06-4.07-4.230NEODyS: "Based on 111 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-01.004."
2013 LZ28NEODyS1323R 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 1 July '13

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

1326Generated Traffic Report
1323Noted that NEODyS has removed 2013 LZ28 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-N01 - Daily Orbit Update - see above