Galex NUV grism view of C/2004 Q2 (Machholz) on 1 March 
2005. Credit: NASA/JPL, U.Wash, and Morgenthaler.

A Planetary Science Institute (PSI) news release posted at reports that ultraviolet observation of comet C/2004 Q2 (Machholz) from the NASA Galex space telescope produced "radial profiles of atomic carbon emissions" that suggest lower carbon content in some comets than previously thought, which could affect ideas about where comets formed and their influence on life on Earth. This false-color image of C/2004 Q2 is from the Galex NUV grism in March 2005, credit NASA/JPL, U.Wash., and Jeff Morgenthaler.

Contents  on 17 December '10


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 17 December '10

The MPC's NEO Confirmation Page has 10 listings: 1 new, 9 updated

When last checked at 2248 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and nine updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of twelve listings on the NEOCP at some point 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 17 December '10

Minor Planet Electronic Circulars

As of last check at 2248 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-Y10 - "21:49 UT" - 2010 YB

<< DOU on 17 Dec. '10 >>  MPEC 2010-Y09 - "07:09 UT" - Daily Orbit Update

Observers  on 17 December '10

Eleven observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPEC 2010-Y09 -- 2010 XX58, 2010 XT45, 2010 XJ3, 2010 XG, 2010 XF3, 2010 VN65, 2010 SD13, 2010 RN80, 2010 RE31, 2010 LF86, 3122
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-Y10 -- 2010 YB
J95Great Shefford Obs. in England, 1 in MPEC 2010-Y09 -- 2010 XR69
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2010-Y09 -- 2010 JL33, 2006 VB14
J75La Sagra Obs. in Spain, 2 in MPECs 2010-Y09 & 2010-Y10 -- 2010 YB, 1864
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-Y09 -- 2010 XP51
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-Y09 -- 2010 OK126
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2010-Y09 & 2010-Y10 -- 2010 YB, 1999 XR35
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-Y10 -- 2010 YB
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-Y10 -- 2010 YB
718Wiggins Obs. in Utah, 1 in MPEC 2010-Y10 -- 2010 YB
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 December '10

At last check (NEODyS and JPL at 2238 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 17 December '10

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

2200Grabbed MPEC 2010-Y10 - 2010 YB - see above
1631Grabbed MPEC 2010-Y09 - Daily Orbit Update - see above