Contents  on 6 December '10

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 6 December '10

The MPC's NEO Confirmation Page has 8 listings: 3 new, 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and five updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of thirteen 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 6 December '10

Minor Planet Electronic Circulars

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


<< DOU on 6 Dec. '10 >>  MPEC 2010-X65 - "07:07 UT" - Daily Orbit Update


MPEC 2010-X64 - "05:41 UT" - 2010 XJ11


MPEC 2010-X63 - "05:22 UT" - 2010 XH11


MPEC 2010-X62 - "05:18 UT" - 2010 XG11


MPEC 2010-X61 - "04:53 UT" - 2010 XF11


MPEC 2010-X60 - "04:26 UT" - 2010 XE11

Observers  on 6 December '10

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2010-X60 -- 2010 XE11
300Bisei Spaceguard Center in Japan, 3 in MPECs 2010-X60, 2010-X62 & 2010-X64 -- 2010 XJ11, 2010 XG11, 2010 XE11
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2010-X62 & 2010-X65 -- 2010 XG11, 2009 CQ5, 52761, 36236, 198856, 174050, 137199, 5828
8071Marc W. Buie via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2010-X65 -- 2010 SL13
639Dresden Obs. in Germany, 2 in MPEC 2010-X65 -- 2010 LF86, 2005 GC120
H20Eastern Illinois Univ. Obs. in Illinois, 6 in MPEC 2010-X65 -- 2010 XG, 2010 XF3, 2010 WP8, 2010 VN65, 2005 GC120, 2002 VE68
J95Great Shefford Obs. in England, 4 in MPECs 2010-X60, 2010-X61, 2010-X62 & 2010-X64 -- 2010 XJ11, 2010 XG11, 2010 XF11, 2010 XE11
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2010-X65 -- 2010 WL, 2010 RF181, 2010 LF86, 2006 VB14, 2005 GC120
240Herrenberg Obs. in Germany, 1 in MPEC 2010-X65 -- 152978
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-X65 -- 250162
704LINEAR in New Mexico, 5 in MPECs 2010-X60 & 2010-X65 -- 2010 XO10, 2010 XE11, 1999 XM141, 96590, 68278
A14Les Engarouines Obs. in France, 1 in MPEC 2010-X65 -- 249595
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-X60 -- 2010 XE11
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2010-X61 -- 2010 XF11
213Montcabre Obs. in Spain, 1 in MPEC 2010-X60 -- 2010 XE11
G96Mt. Lemmon Survey (MLS) in Arizona, 16 in MPECs 2010-X61, 2010-X63, 2010-X64 & 2010-X65 -- 2010 XJ11, 2010 XH11, 2010 XG11, 2010 XF11, 2010 XB11, 2010 WU8, 2010 WP8, 2010 VY190, 2010 RM42, 2007 BM8, 2006 SH7, 1999 XR35, 1994 XG, 30825, 203015, 162385
A24New Millennium Obs. in Italy, 1 in MPEC 2010-X65 -- 2010 XT10
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2010-X65 -- 2010 SD13, 2010 NW117, 2002 OS4
H36Sandlot Obs. in Kansas, 5 in MPECs 2010-X60, 2010-X61, 2010-X62, 2010-X63 & 2010-X64 -- 2010 XJ11, 2010 XH11, 2010 XG11, 2010 XF11, 2010 XE11
J26Spaceguard Centre in Wales, 1 in MPEC 2010-X65 -- 3838
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2010-X65 -- 2010 VA1, 2004 BW1, 155340
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2010-X65 -- 2010 XU, 2010 XR, 2010 XN, 2010 XK3, 2010 WA9, 2010 VE139, 2010 VC40, 2010 MF1, 2010 JH87
B18Terskol Obs. in Russia, 1 in MPEC 2010-X60 -- 2010 XE11
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-X65 -- 2010 LF86
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 December '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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2010 XD11NEODyS16382042-208271.5e-10-6.13-6.810NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2010-12-03.445 to 2010-12-05.509."
2010 XC11NEODyS16382013-208293.6e-09-4.40-4.540NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2010-12-03.306 to 2010-12-05.388."
2010 XK3NEODyS1638R E M O V E D-
JPL Sentry1638R E M O V E DJPL: Risk listing removed at 1050 UTC.
2010 XUJPL Sentry16382037-2103171.7e-07-7.17-7.650JPL: "Analysis based on 36 observations spanning 4.2450 days (2010-Dec-01.09924 to 2010-Dec-05.34423)." Diameter approximately 0.033 km. from mean, weighted H=25.1.
NEODyS16382034-2088131.34e-07-7.22-7.370NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2010-12-01.100 to 2010-12-05.345."
2010 XRJPL Sentry1638201315.3e-06-4.62-4.620JPL: "Analysis based on 14 observations spanning 3.0869 days (2010-Dec-02.35142 to 2010-Dec-05.43837)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS16382013-201317.1e-06-4.50-4.50NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2010-12-02.352 to 2010-12-05.439."
2010 XNJPL Sentry1638207521.6e-08-7.81-8.070JPL: "Analysis based on 21 observations spanning 4.0998 days (2010-Dec-01.30772 to 2010-Dec-05.40747)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS1638R E M O V E D-
2010 WA9JPL Sentry16382071-209827.4e-09-8.84-8.880JPL: "Analysis based on 25 observations spanning 5.1111 days (2010-Nov-30.26884 to 2010-Dec-05.37991)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
NEODyS16382051-205524.0e-11-10.79-11.040NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2010-11-30.270 to 2010-12-05.381."
2010 WK1NEODyS1638R E M O V E D-
2003 LN6JPL Sentry23592061-209931.6e-06-5.79-5.830JPL: "Analysis based on 98 observations spanning 14.896 days (2003-Jun-09.27598 to 2003-Jun-24.17244)." Diameter approximately 0.043 km. from mean, weighted H=24.5.
2001 GP2JPL Sentry23592043-2109371.0e-04-5.18-5.640JPL: "Analysis based on 28 observations spanning 27.002 days (2001-Apr-13.3245 to 2001-May-10.32697)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
2001 CA21JPL Sentry23592020-207349.8e-09-3.85-4.160JPL: "Analysis based on 13 observations spanning 1.9210 days (2001-Feb-02.45718 to 2001-Feb-04.37822)." Diameter approximately 0.677 km. from mean, weighted H=18.5.
2001 AV43JPL Sentry23592069-210757.1e-07-6.27-6.850JPL: "Analysis based on 1 radar Doppler and 46 optical observations spanning 182.44 days (2000-Aug-30.08073 to 2001-Feb-28.51881)." Diameter approximately 0.046 km. from mean, weighted H=24.4.
2000 SG344JPL Sentry23592068-21101352.3e-03-2.95-3.370JPL: "Analysis based on 31 observations spanning 507.40 days (1999-May-15.20482 to 2000-Oct-03.60723)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
1999 SF10JPL Sentry23592080-210862.5e-06-5.59-6.070JPL: "Analysis based on 49 observations spanning 9.2651 days (1999-Sep-30.16385 to 1999-Oct-09.42891)." Diameter approximately 0.053 km. from mean, weighted H=24.0.
1997 UA11JPL Sentry23592053-207321.5e-07-6.97-6.990JPL: "Analysis based on 29 observations spanning 12.938 days (1997-Oct-26.28929 to 1997-Nov-08.22721)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
1991 BAJPL Sentry23592014-2100127.3e-07-7.24-7.570JPL: "Analysis based on 7 observations spanning .19294 days (1991-Jan-18.2262 to 1991-Jan-18.41914)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
1979 XBJPL Sentry23592056-208623.0e-07-3.02-3.070JPL: "Analysis based on 17 observations spanning 3.9189 days (1979-Dec-11.51059 to 1979-Dec-15.42951)." Diameter approximately 0.687 km. from mean, weighted H=18.5.

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 6 December '10

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

2359Noted that JPL Sentry has updated its 1979 XB risk assessment - see above
Noted that JPL Sentry has updated its 1991 BA risk assessment - see above
Noted that JPL Sentry has updated its 1997 UA11 risk assessment - see above
Noted that JPL Sentry has updated its 1999 SF10 risk assessment - see above
Noted that JPL Sentry has updated its 2000 SG344 risk assessment - see above
Noted that JPL Sentry has updated its 2001 AV43 risk assessment - see above
Noted that JPL Sentry has updated its 2001 CA21 risk assessment - see above
Noted that JPL Sentry has updated its 2001 GP2 risk assessment - see above
Noted that JPL Sentry has updated its 2003 LN6 risk assessment - see above
1638Noted that JPL Sentry has updated its 2010 WA9 risk assessment - see above
Noted that NEODyS has updated its 2010 WA9 risk assessment - see above
Noted that NEODyS has removed 2010 WK1 as an impact risk - see above
Noted that NEODyS has posted 2010 XC11 as an impact risk - see above
Noted that NEODyS has posted 2010 XD11 as an impact risk - see above
Noted that JPL Sentry has removed 2010 XK3 as an impact risk - see above
Noted that NEODyS has removed 2010 XK3 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 XN risk assessment - see above
Noted that NEODyS has removed 2010 XN as an impact risk - see above
Noted that JPL Sentry has updated its 2010 XR risk assessment - see above
Noted that NEODyS has updated its 2010 XR risk assessment - see above
Noted that JPL Sentry has updated its 2010 XU risk assessment - see above
Noted that NEODyS has updated its 2010 XU risk assessment - see above
Grabbed MPEC 2010-X65 - Daily Orbit Update - see above
0606Grabbed MPEC 2010-X64 - 2010 XJ11 - see above
0537Grabbed MPEC 2010-X62 - 2010 XG11 - see above
Grabbed MPEC 2010-X63 - 2010 XH11 - see above
0508Grabbed MPEC 2010-X61 - 2010 XF11 - see above
0439Grabbed MPEC 2010-X60 - 2010 XE11 - see above