Image of claimed Earth Trojan 2010 TK10 from WISE 
in Oct. 2010. Credit: NASA/JPL-Caltech/UCLA.

NASA is claiming discovery of the first Earth Trojan asteroid, 2010 TK10, seen here in false-color WISE space telescope October 2010 infrared imagery. Working from a short observation arc and admitting orbital instabilities, the claim has raised discussion on the Minor Planet Mailing List (MPML thread and see this, second paragraph). Sky & Telescope and Space.com have reports. Image credit: NASA/JPL-Caltech/UCLA.


Contents  on 28 July '11

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.

NEOCP Activity  on 28 July '11

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 45 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 28 July '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-O53 - "23:11 UT" - Comet 45P/Honda-Mrkos-Pajdusakova


MPEC 2011-O52 - "18:04 UT" - 2011 OJ10


<< DOU on 28 July '11 >>  MPEC 2011-O51 - "07:11 UT" - Daily Orbit Update


MPEC 2011-O50 - "02:14 UT" - 2011 OR5


MPEC 2011-O49 - "02:12 UT" - 2011 OQ5


MPEC 2011-O48 - "01:26 UT" - Five New TNOs


MPEC 2011-O47 - "01:10 UT" - 2004 KV18


MPEC 2011-O46 - "01:06 UT" - 2011 OM5


MPEC 2011-O45 - "01:05 UT" - 2011 OL5


MPEC 2011-O44 - "01:03 UT" - 2011 OK5


MPEC 2011-O43 - "01:01 UT" - 2011 OJ5

Observers  on 28 July '11

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPECs 2011-O43, 2011-O44, 2011-O49 & 2011-O50 -- 2011 OR5, 2011 OQ5, 2011 OK5, 2011 OJ5
3092Brett Gladman via Cerro Paranal in Chile, 2 in MPECs 2011-O47 & 2011-O48 -- 2004 PY117, 2004 KV18
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2011-O43, 2011-O45, 2011-O46, 2011-O49, 2011-O51 & 2011-O52 -- 2011 OQ5, 2011 OM5, 2011 OL5, 2011 OJ5, 2011 OJ10, 2011 OB
G58Chabot Obs. in northern California, 3 in MPEC 2011-O51 -- 2010 OF101, 2004 RX10, 152828
A77Chante-Perdrix Obs. in France, 1 in MPEC 2011-O53 -- 45P
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2011-O53 -- 45P
958Dax Obs. in France, 1 in MPEC 2011-O53 -- 45P
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 2 in MPECs 2011-O43 & 2011-O52 -- 2011 OJ5, 2011 OJ10
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-O49 -- 2011 OQ5
E10Faulkes Telescope South in New South Wales, 2 in MPECs 2011-O44 & 2011-O45 -- 2011 OL5, 2011 OK5
J95Great Shefford Obs. in England, 4 in MPECs 2011-O43, 2011-O49, 2011-O50 & 2011-O53 -- 2011 OR5, 2011 OQ5, 2011 OJ5, 45P
6959Joel Parker via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPECs 2011-O47 & 2011-O48 -- 2006 BS284, 2004 VH131, 2004 PY117, 2004 MW8, 2004 KV18
695^Spacewatch via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2011-O51 -- 2011 HP
J75La Sagra Obs. in Spain, 1 in MPEC 2011-O49 -- 2011 OQ5
809,program code "," (21) via La Silla in Chile, 2 in MPECs 2011-O47 & 2011-O48 -- 2004 PY117, 2004 KV18
5684program code 4 on Mauna Kea in Hawaii, 4 in MPECs 2011-O47 & 2011-O48 -- 2004 VH131, 2004 VG131, 2004 PY117, 2004 KV18
568{JJ Kavelaars on Mauna Kea in Hawaii, 2 in MPEC 2011-O48 -- 2006 BS284, 2004 VH131
6758Brett Gladman via Mt. Palomar in southern California, 3 in MPEC 2011-O48 -- 2006 BS284, 2004 VG131, 2004 MW8
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2011-O43, 2011-O44, 2011-O50, 2011-O51 & 2011-O52 -- 2011 OR5, 2011 OK5, 2011 OJ5, 2011 OJ10, 2010 VB1, 5731
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPECs 2011-O51 & 2011-O53 -- 2011 NZ, 2011 MV1, 2011 CG2, 2008 TR10, 2000 CP101, 267759, 45P
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-O53 -- 45P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-O49 -- 2011 OQ5
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2011-O45, 2011-O46 & 2011-O51 -- 2011 OM5, 2011 OL5, 2008 OO, 5751
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2011-O49 & 2011-O50 -- 2011 OR5, 2011 OQ5
B51Vallauris Obs. in France, 1 in MPEC 2011-O53 -- 45P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 28 July '11

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

2359Grabbed MPEC 2011-O53 - Comet 45P/Honda-Mrkos-Pajdusakova - see above
1823Grabbed MPEC 2011-O52 - 2011 OJ10 - see above
1603Grabbed MPEC 2011-O51 - Daily Orbit Update - see above
0356Grabbed MPEC 2011-O49 - 2011 OQ5 - see above
Grabbed MPEC 2011-O50 - 2011 OR5 - see above
0131Grabbed MPEC 2011-O43 - 2011 OJ5 - see above
Grabbed MPEC 2011-O44 - 2011 OK5 - see above
Grabbed MPEC 2011-O45 - 2011 OL5 - see above
Grabbed MPEC 2011-O46 - 2011 OM5 - see above
Grabbed MPEC 2011-O47 - 2004 KV18 - see above
Grabbed MPEC 2011-O48 - Five New TNOs - see above