Contents  on 5 December '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 5 December '10

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. Of these, four 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 5 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.

MPEC 2010-X59 - "13:51 UT" - 2010 XD11

MPEC 2010-X58 - "13:45 UT" - 2010 XC11

MPEC 2010-X57 - "13:38 UT" - 2010 XB11

<< DOU on 5 Dec. '10 >>  MPEC 2010-X56 - "07:07 UT" - Daily Orbit Update

MPEC 2010-X55 - "04:35 UT" - 2010 XA11

MPEC 2010-X54 - "02:56 UT" - 2010 XU10

Observers  on 5 December '10

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2010-X56 -- 2010 TY54, 2010 TM3, 2010 TK19, 2010 TB54, 2010 RY3, 2010 RV30, 2010 RT3, 2010 RH43, 2010 RB, 2010 PR66, 2010 OL101, 2010 LR68, 2010 KZ117
E18BDI Obs. in New South Wales, 1 in MPEC 2010-X56 -- 2010 LY63
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-X55 -- 2010 XA11
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2010-X55 & 2010-X56 -- 2010 XA11, 2010 VK188, 2010 UK8, 2010 TC47, 2003 SV222, 1999 XR35, 96590, 242211, 143381, 138852
113Drebach Obs. in Germany, 3 in MPEC 2010-X56 -- 2010 XJ3, 2010 XG3, 2010 WP8
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2010-X55 & 2010-X58 -- 2010 XC11, 2010 XA11
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2010-X56 -- 2010 WL, 2010 SC41, 2010 RF181, 2010 LF86, 2006 VB14, 2005 GC120
704LINEAR in New Mexico, 7 in MPEC 2010-X56 -- 2010 XO10, 2010 LR68, 96590, 241370, 216115, 12923, 3288
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-X54, 2010-X57, 2010-X58 & 2010-X59 -- 2010 XU10, 2010 XD11, 2010 XC11, 2010 XB11
A06Mataro Obs. in Spain, 1 in MPEC 2010-X56 -- 96590
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2010-X54, 2010-X56, 2010-X57, 2010-X58 & 2010-X59 -- 2010 XY, 2010 XU10, 2010 XF3, 2010 XD11, 2010 XC11, 2010 XB11, 2010 VK188, 2009 BA71, 194268, 168378
A24New Millennium Obs. in Italy, 1 in MPEC 2010-X55 -- 2010 XA11
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2010-X56 -- 2010 WP8, 2010 WL, 2010 VY190, 2010 TM3, 1999 XR35, 141498, 1580
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2010-X56 -- 2010 VX139
473Remanzacco Obs. in Italy, 1 in MPEC 2010-X55 -- 2010 XA11
H36Sandlot Obs. in Kansas, 4 in MPECs 2010-X55, 2010-X56, 2010-X57 & 2010-X59 -- 2010 XU10, 2010 XD11, 2010 XB11, 2010 XA11
204Schiaparelli Obs. in Italy, 4 in MPECs 2010-X55 & 2010-X56 -- 2010 XA11, 2003 YT124, 2003 MJ4, 2001 VB2
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2010-X56 & 2010-X59 -- 2010 XD11, 2010 WS, 2010 WA9, 2010 TU5, 2010 MF1
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-X56 -- 2010 WZ8
I15Wishing Star Obs. in Rhode Island, 5 in MPEC 2010-X56 -- 2010 SC41, 2008 YU32, 2005 GC120, 207945, 153814
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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.





Notes for Today's Latest Risk Assessments
2010 XD11JPL Sentry1726206811.4e-10-6.21-6.210JPL: "Analysis based on 21 observations spanning 2.0643 days (2010-Dec-03.44398 to 2010-Dec-05.50826)." Diameter approximately 0.790 km. from mean, weighted H=18.2.
2010 XC11JPL Sentry17262013-2098191.1e-08-4.15-4.320JPL: "Analysis based on 26 observations spanning 2.0819 days (2010-Dec-03.30502 to 2010-Dec-05.38692)." Diameter approximately 0.453 km. from mean, weighted H=19.4.
2010 WA9JPL Sentry17262067-209839.6e-08-7.60-7.950JPL: "Analysis based on 22 observations spanning 4.0689 days (2010-Nov-30.26884 to 2010-Dec-04.33774)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
NEODyS17262040-206721.36e-10-10.22-10.440NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2010-11-30.270 to 2010-12-04.339."
2007 YMJPL Sentry04132011-21071095.8e-06-5.20-5.320JPL: "Analysis based on 12 observations spanning .12805 days (2007-Dec-17.39661 to 2007-Dec-17.52466)." Diameter approximately 0.020 km. from mean, weighted H=26.1.

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 5 December '10

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

1726Noted 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 JPL Sentry has posted 2010 XC11 as an impact risk - see above
Noted that JPL Sentry has posted 2010 XD11 as an impact risk - see above
Grabbed MPEC 2010-X56 - Daily Orbit Update - see above
Grabbed MPEC 2010-X57 - 2010 XB11 - see above
Grabbed MPEC 2010-X58 - 2010 XC11 - see above
Grabbed MPEC 2010-X59 - 2010 XD11 - see above
0442Grabbed MPEC 2010-X55 - 2010 XA11 - see above
0413Noted that JPL Sentry has updated its 2007 YM risk assessment - see above
0316Grabbed MPEC 2010-X54 - 2010 XU10 - see above