Scanning electron microscope view of particles 
from Hayabusa. Image (c) copyright JAXA.

They look like big chunks in this scanning electron microscope view of a "spatula" used to remove particles from the first of Hayabusa's two sample return compartments. Most are less than ten microns in diameter, but the excitement from the Japan Aerospace Exploration Agency is that about 1,500 of them consist of olivine and other minerals expected to come from an asteroid such as 25143 Itokawa rather than from other places on the spacecraft's long journey (Japan and Australia). Sky & Telescope has a report. Image ©copyright JAXA.

Contents  on 17 November '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 November '10

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of seven 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 November '10

Minor Planet Electronic Circulars

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

MPEC 2010-W08 - "23:44 UT" - 2010 VU198

<< DOU on 17 Nov. '10 >>  MPEC 2010-W07 - "07:12 UT" - Daily Orbit Update

MPEC 2010-W06 - "02:33 UT" - 2010 WC

Observers  on 17 November '10

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2010-W06, 2010-W07 & 2010-W08 -- 2010 WC, 2010 VZ139, 2010 VY190, 2010 VV98, 2010 VU198, 2010 VQ98, 2010 VQ21, 2010 VN98, 2010 VN139, 2010 VM65, 2010 VE139, 2010 VB72, 2010 UX7, 2010 SD13, 2010 OC, 2010 OA, 2010 BL2, 2007 VC138, 2002 VE68, 2001 VB2
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2010-W07 -- 2010 LF86
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2010-W06 & 2010-W07 -- 2010 WC, 2010 TJ54, 2010 TC47, 2010 SC41, 2008 EL, 2007 TD71, 2002 UR3, 25916, 154300, 100926
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2010-W07 -- 2010 US7
J95Great Shefford Obs. in England, 2 in MPEC 2010-W07 -- 2010 WA, 2010 VK139
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-W07 -- 2007 VC138
704LINEAR in New Mexico, 4 in MPEC 2010-W07 -- 2010 VY190, 2010 VN65, 2010 UE51, 2010 LF86
J75La Sagra Obs. in Spain, 1 in MPEC 2010-W07 -- 7839
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2010-W07 & 2010-W08 -- 2010 VU198, 2010 VA140, 2005 JR5, 136849
J69North Obs. in England, 2 in MPEC 2010-W07 -- 2010 VK139, 2010 UX6
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2010-W07 -- 2010 TU149, 2010 GJ65
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-W06 -- 2010 WC
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2010-W07 & 2010-W08 -- 2010 VU198, 2010 VJ, 2010 VF139, 2010 VF1, 2010 VE1, 2010 VD1, 2010 VC40, 2010 VA76, 2010 UD8, 2010 UA7, 2010 TP55, 2010 JA35, 2006 KV86
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPEC 2010-W07 -- 2010 VY190, 2010 VK139
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 November '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 VW194NEODyS16122047-2089232.23e-05-5.47-6.010NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2010-11-15.343 to 2010-11-16.393."
2010 VZ139NEODyS1612R E M O V E D-
2010 VQ98JPL Sentry1612210914.1e-06-7.43-7.430JPL: "Analysis based on 25 observations spanning 5.8457 days (2010-Nov-10.43786 to 2010-Nov-16.28357)." Diameter approximately 0.008 km. from mean, weighted H=28.1.
NEODyS1612R E M O V E D-
2010 UE51JPL Sentry16122077-207827.3e-05-6.10-6.370JPL: "Analysis based on 147 observations spanning 18.153 days (2010-Oct-29.25716 to 2010-Nov-16.41032)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS16122074-207411.3e-06-7.84-7.840NEODyS: "Based on 149 optical observations (of which 2 are rejected as outliers) from 2010-10-29.258 to 2010-11-16.411."

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 17 November '10

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

2359Grabbed MPEC 2010-W08 - 2010 VU198 - see above
1612Noted that JPL Sentry has updated its 2010 UE51 risk assessment - see above
Noted that NEODyS has updated its 2010 UE51 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VQ98 risk assessment - see above
Noted that NEODyS has removed 2010 VQ98 as an impact risk - see above
Noted that NEODyS has posted 2010 VW194 as an impact risk - see above
Noted that NEODyS has removed 2010 VZ139 as an impact risk - see above
Grabbed MPEC 2010-W07 - Daily Orbit Update - see above
0245Grabbed MPEC 2010-W06 - 2010 WC - see above