Tom Gehrels 1925-2011. 
Photo courtesy U.Ariz.

Astronomer Tom Gehrels has passed away. He was an early member of the University of Arizona's Lunar and Planetary Lab and co-founder of the pioneering Spacewatch Project, among numerous other accomplishments. See yesterday's U.A. news and Sky & Telescope report. Photo courtesy of U.A.

Contents  on 13 July '11


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.

NEOCP Activity  on 13 July '11

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of seven 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 13 July '11

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 13 July '11 >>  MPEC 2011-N42 - "07:07 UT" - Daily Orbit Update

Observers  on 13 July '11

Six observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPEC 2011-N42 -- 2011 NZ, 2011 NY, 2011 NP, 2011 MW1, 2011 MV1, 2011 MO4, 2011 ME, 2011 LA19, 2011 KN9, 2011 JA8, 2011 DS9, 2009 QZ6, 2009 AV, 2006 SC6
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-N42 -- 2009 WR6
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2011-N42 -- 2011 NZ, 2011 FB29, 2002 XP90
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2011-N42 -- 2011 MK, 2011 LA19
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-N42 -- 2011 EZ78, 2008 LV16, 68348
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-N42 -- 2008 KD6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 July '11

At last check (NEODyS and JPL at 2359 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 13 July '11

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

1625Grabbed MPEC 2011-N42 - Daily Orbit Update - see above