Contents  on 27 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 27 November '10

The MPC's NEO Confirmation Page has 12 listings: 1 new, 11 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and eleven updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of sixteen 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 27 November '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-W42 - "15:45 UT" - 2010 WK1

MPEC 2010-W41 - "15:41 UT" - 2010 WJ1

MPEC 2010-W40 - "15:32 UT" - 2010 WH1

MPEC 2010-W39 - "15:24 UT" - 2010 WG1

MPEC 2010-W38 - "15:21 UT" - 2010 WF1

MPEC 2010-W37 - "15:16 UT" - 2010 WE1

MPEC 2010-W36 - "15:11 UT" - 2010 WD1

MPEC 2010-W35 - "15:04 UT" - 2010 WC1

<< DOU on 27 Nov. '10 >>  MPEC 2010-W34 - "07:13 UT" - Daily Orbit Update

Observers  on 27 November '10

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPEC 2010-W34 -- 2010 WL, 2010 WJ, 2010 WH, 2010 WB, 2010 VY190, 2010 VW98, 2010 VL1, 2010 VB140, 2010 UX7, 2010 SA12, 2010 JF88
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-W34 -- 2010 WT
703Catalina Sky Survey in Arizona, 1 in MPEC 2010-W42 -- 2010 WK1
448Desert Moon Obs. in New Mexico, 3 in MPEC 2010-W34 -- 2010 VL1, 2010 VE, 2010 QE2
203GiaGa Obs. in Italy, 4 in MPEC 2010-W34 -- 2010 TC47, 2010 SC41, 2010 LF86, 2008 YU32
J95Great Shefford Obs. in England, 1 in MPEC 2010-W34 -- 2010 UE51
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2010-W34 -- 2010 SC41, 2010 RF181, 2007 VC138, 2006 VB14, 5869
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-W34 -- 2010 RN80
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-W34 -- 2010 TK54
711McDonald Obs. in Texas, 2 in MPEC 2010-W34 -- 2010 WB, 2010 VY190
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2010-W34, 2010-W35, 2010-W36, 2010-W37, 2010-W38, 2010-W39, 2010-W40 & 2010-W41 -- 2010 WJ1, 2010 WH1, 2010 WG1, 2010 WF1, 2010 WE1, 2010 WD1, 2010 WC1, 2010 UH7, 52761
H36Sandlot Obs. in Kansas, 3 in MPEC 2010-W34 -- 2010 WJ, 2010 WH, 2010 VB140
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-W34 -- 2000 UP30
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2010-W34 -- 2010 LF86
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 WK1JPL Sentry18302035-210793.9e-06-6.86-7.000JPL: "Analysis based on 12 observations spanning .06593 days (2010-Nov-27.46218 to 2010-Nov-27.52811)." Diameter approximately 0.008 km. from mean, weighted H=28.3.
2010 WC1JPL Sentry17452046-2109197.7e-07-7.76-8.180JPL: "Analysis based on 8 observations spanning .99848 days (2010-Nov-26.29789 to 2010-Nov-27.29637)." Diameter approximately 0.010 km. from mean, weighted H=27.6.
2010 UE51NEODyS17102074-207854.06e-05-6.37-6.560NEODyS: "Based on 169 optical observations (of which 4 are rejected as outliers) from 2010-10-29.258 to 2010-11-25.010."
JPL Sentry1710R E M O V E D-

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 27 November '10

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

1830Noted that JPL Sentry has posted 2010 WK1 as an impact risk - see above
1745Noted that JPL Sentry has posted 2010 WC1 as an impact risk - see above
1710Noted that JPL Sentry has removed 2010 UE51 as an impact risk - see above
Noted that NEODyS has updated its 2010 UE51 risk assessment - see above
Grabbed MPEC 2010-W34 - Daily Orbit Update - see above
Grabbed MPEC 2010-W35 - 2010 WC1 - see above
Grabbed MPEC 2010-W36 - 2010 WD1 - see above
Grabbed MPEC 2010-W37 - 2010 WE1 - see above
Grabbed MPEC 2010-W38 - 2010 WF1 - see above
Grabbed MPEC 2010-W39 - 2010 WG1 - see above
Grabbed MPEC 2010-W40 - 2010 WH1 - see above
Grabbed MPEC 2010-W41 - 2010 WJ1 - see above
Grabbed MPEC 2010-W42 - 2010 WK1 - see above