Two images of 2867 Steins from Rosetta 
on 5 Sept. 2008. (c)Copyright ESA.

The European Space Agency yesterday previewed the coming July 10th Rosetta flyby of Main Belt asteroid 21 Lutetia, which the mission studied distantly in January 2007. This object's properties are poorly understood but it is considerably larger than Main Belter 2867 Steins, flown past in September 2008. These two Rosetta OSIRIS shots of Steins are similar enough to "free view" (defocus your eyes and let the two fuse into a third) in 3D. ©Copyright 2008 ESA.

Contents  on 16 June '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 16 June '10

The MPC's NEO Confirmation Page has 7 listings: 2 new, 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and five updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of fourteen 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 16 June '10

Minor Planet Electronic Circulars

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

MPEC 2010-M10 - "22:55 UT" - 2010 MA

MPEC 2010-M09 - "16:26 UT" - Comet C/2010 L3 (Catalina)

MPEC 2010-M08 - "14:47 UT" - 2010 LO33

MPEC 2010-M07 - "13:23 UT" - 2010 LM68

MPEC 2010-M06 - "13:17 UT" - 2010 LL68

MPEC 2010-M05 - "13:06 UT" - 2010 LK68

MPEC 2010-M04 - "13:02 UT" - 2010 LJ68

<< DOU on 16 June '10 >>  MPEC 2010-M03 - "06:10 UT" - Daily Orbit Update

MPEC 2010-M02 - "03:12 UT" - 2007 OG3 = 1975 UW

MPEC 2010-M01 - "00:31 UT" - 2010 LE68

Observers  on 16 June '10

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2010-M07 & 2010-M09 -- 2010 LM68, C/2010 L3
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2010-M03, 2010-M07, 2010-M09 & 2010-M10 -- 2010 MA, 2010 LM68, 2010 LL34, C/2010 L3, 85818, 152889, 140158, 137170
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2010-M08 -- 2010 LO33
448Desert Moon Obs. in New Mexico, 6 in MPECs 2010-M03, 2010-M07 & 2010-M09 -- 2010 LM68, 2010 LJ14, C/2010 L3, 2010 FO92, 2010 AE, 159609
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-M07 -- 2010 LM68
651Grasslands Obs. in Arizona, 2 in MPECs 2010-M01 & 2010-M07 -- 2010 LM68, 2010 LE68
J95Great Shefford Obs. in England, 5 in MPECs 2010-M01, 2010-M02, 2010-M07, 2010-M09 & 2010-M10 -- 2010 MA, 2010 LM68, 2010 LE68, C/2010 L3, 2007 OG3
A17Guidestar Obs. in Germany, 1 in MPEC 2010-M07 -- 2010 LM68
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2010-M07 & 2010-M09 -- 2010 LM68, C/2010 L3
B15Inastars Obs. in Germany, 2 in MPECs 2010-M07 & 2010-M09 -- 2010 LM68, C/2010 L3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2010-M01, 2010-M03, 2010-M04, 2010-M05, 2010-M06, 2010-M07, 2010-M09 & 2010-M10 -- 2010 MA, 2010 LM68, 2010 LL68, 2010 LL34, 2010 LK68, 2010 LJ68, 2010 LE68, 2010 LD64, 2010 LC64, C/2010 L3, 2010 JH110
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-M03 -- 2010 HX107
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2010-M01, 2010-M03, 2010-M08 & 2010-M10 -- 2010 MA, 2010 LO33, 2010 LE68, 2010 LA64, 2010 KD, 68348
658Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2010-M09 -- C/2010 L3
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2010-M07 -- 2010 LM68
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-M09 -- C/2010 L3
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-M07 -- 2010 LM68
H36Sandlot Obs. in Kansas, 2 in MPECs 2010-M07 & 2010-M09 -- 2010 LM68, C/2010 L3
204Schiaparelli Obs. in Italy, 4 in MPEC 2010-M03 -- 2010 LF, 2010 JF88, 2004 KH17, 2003 RN10
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-M03 -- 2010 CL18
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-M03 -- 2010 LJ61, 2010 LJ14, 2010 KP10, 2010 JG87, 2010 GX62, 2010 GW62, 2010 GR75, 2003 HB
926Tenagra II Obs. in Arizona, 8 in MPECs 2010-M03, 2010-M07 & 2010-M09 -- 2010 LM68, 2010 LM34, 2010 LK34, 2010 LG14, 2010 LC64, 2010 LB64, 2010 LA64, C/2010 L3
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPECs 2010-M07 & 2010-M09 -- 2010 LM68, C/2010 L3
C51WISE in Earth polar orbit, 7 in MPECs 2010-M03, 2010-M04, 2010-M05 & 2010-M06 -- 2010 LL68, 2010 LK68, 2010 LJ68, 2010 LE15, 2010 JG, 2008 EB9, 2004 LG
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2010-M03 -- 2009 KD5, 241370
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 June '10

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 CLOMON (backup) risk pages.





Notes for Today's Latest Risk Assessments
2010 LJ68JPL Sentry15502015-2092387.4e-08-5.82-6.520JPL: "Analysis based on 20 observations spanning 4.4811 days (2010-Jun-11.74037 to 2010-Jun-16.22142)." Diameter approximately 0.090 km. from mean, weighted H=22.9.
2010 LD64NEODyS15502057-206531.72e-08-8.18-8.200NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2010/06/14.288 to 2010/06/15.347."

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 16 June '10

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

2309Grabbed MPEC 2010-M10 - 2010 MA - see above
1710Grabbed MPEC 2010-M09 - Comet C/2010 L3 (Catalina) - see above
1550Noted that NEODyS has updated its 2010 LD64 risk assessment - see above
Noted that JPL Sentry has posted 2010 LJ68 as an impact risk - see above
Grabbed MPEC 2010-M03 - Daily Orbit Update - see above
Grabbed MPEC 2010-M04 - 2010 LJ68 - see above
Grabbed MPEC 2010-M05 - 2010 LK68 - see above
Grabbed MPEC 2010-M06 - 2010 LL68 - see above
Grabbed MPEC 2010-M07 - 2010 LM68 - see above
Grabbed MPEC 2010-M08 - 2010 LO33 - see above
0348Grabbed MPEC 2010-M02 - 2007 OG3 = 1975 UW - see above
0113Grabbed MPEC 2010-M01 - 2010 LE68 - see above