Contents  on 2 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 2 December '10

The MPC's NEO Confirmation Page has 18 listings: 2 new, 16 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and sixteen updated listings. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 34 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 2 December '10

Minor Planet Electronic Circulars

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


MPEC 2010-X28 - "23:32 UT" - 2010 XR


MPEC 2010-X27 - "23:27 UT" - 2010 XQ


MPEC 2010-X26 - "23:23 UT" - 2010 XP


MPEC 2010-X25 - "23:19 UT" - 2010 XO


MPEC 2010-X24 - "19:23 UT" - 2010 XN


MPEC 2010-X23 - "12:05 UT" - 2010 XM


MPEC 2010-X22 - "12:00 UT" - 2010 XL


MPEC 2010-X21 - "11:54 UT" - 2010 XK


MPEC 2010-X20 - "11:50 UT" - 2010 XJ


MPEC 2010-X19 - "11:27 UT" - 2010 XH


MPEC 2010-X18 - "09:26 UT" - 2010 XG


<< DOU on 2 Dec. '10 >>  MPEC 2010-X17 - "07:12 UT" - Daily Orbit Update


MPEC 2010-X16 - "05:03 UT" - 2010 XF


MPEC 2010-X15 - "00:07 UT" - 2010 XE


MPEC 2010-X14 - "00:02 UT" - 2010 XD

Observers  on 2 December '10

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2010-X17 & 2010-X25 -- 2010 XO, 2010 WE3, 2010 WD3
300Bisei Spaceguard Center in Japan, 3 in MPECs 2010-X15, 2010-X19 & 2010-X24 -- 2010 XN, 2010 XH, 2010 XE
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2010-X17 & 2010-X27 -- 2010 XQ, 2010 RP80, 2010 LF86, 2007 TD71, 251346, 249595, 243025, 207945, 100926
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2010-X17 -- 2010 SC41, 2010 RF181, 2006 VB14, 96590
704LINEAR in New Mexico, 13 in MPECs 2010-X17 & 2010-X18 -- 2010 XG, 2010 WZ8, 2010 WB9, 2010 SD13, 2010 LY63, 2010 LF86, 2004 YZ23, 1999 XM141, 96590, 189011, 138852, 137084, 4954
H01Magdalena Ridge Obs. (MRO) in New Mexico, 13 in MPECs 2010-X14, 2010-X16, 2010-X18, 2010-X19, 2010-X20, 2010-X21, 2010-X22, 2010-X23, 2010-X24, 2010-X25, 2010-X26, 2010-X27 & 2010-X28 -- 2010 XR, 2010 XQ, 2010 XP, 2010 XO, 2010 XN, 2010 XM, 2010 XL, 2010 XK, 2010 XJ, 2010 XH, 2010 XG, 2010 XF, 2010 XD
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-X17 -- 2010 PM58
900Moriyama Obs. in Japan, 1 in MPEC 2010-X17 -- 1999 XM141
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPECs 2010-X14, 2010-X15, 2010-X16, 2010-X17, 2010-X19, 2010-X20, 2010-X21, 2010-X22, 2010-X23, 2010-X24, 2010-X25, 2010-X26 & 2010-X28 -- 2010 XR, 2010 XP, 2010 XO, 2010 XN, 2010 XM, 2010 XL, 2010 XK, 2010 XJ, 2010 XH, 2010 XF, 2010 XE, 2010 XD, 2010 WT, 2010 WG3, 2010 UO7, 2010 UM, 68372, 163373, 3102, 1580
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-X17 -- 2010 WD9
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-X21 -- 2010 XK
204Schiaparelli Obs. in Italy, 10 in MPEC 2010-X17 -- 2010 WT, 2010 WS, 2010 WB, 2010 VX139, 2010 UX7, 2005 UO5, 2004 YZ23, 2003 WB25, 2001 XF1, 2000 AC6
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-X17 -- 2004 BW1, 144411
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2010-X17, 2010-X23 & 2010-X24 -- 2010 XN, 2010 XM, 2010 WT8, 2010 WS, 2010 WH3, 2010 WC3, 2010 WC1, 2010 VW75, 2010 VW194, 2010 VG1, 2010 VF139, 2010 UA7, 2010 TJ167, 2010 SS16, 2010 OL100, 2010 EH43, 2007 CN26, 2006 KV86
H10Tzec Maun Obs. Mayhill in New Mexico, 3 in MPECs 2010-X17 & 2010-X18 -- 2010 XG, 2010 WV8, 1997 XS2
C51WISE in Earth polar orbit, 5 in MPEC 2010-X17 -- 2010 PR66, 2005 WK4, 2003 OU, 154715, 7482
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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 XNJPL Sentry21152042-208831.2e-08-7.58-7.710JPL: "Analysis based on 18 observations spanning 1.0875 days (2010-Dec-01.30772 to 2010-Dec-02.39523)." Diameter approximately 0.041 km. from mean, weighted H=24.6.
2010 XJJPL Sentry16052067-210931.4e-09-6.44-6.590JPL: "Analysis based on 11 observations spanning .97215 days (2010-Dec-01.13551 to 2010-Dec-02.10766)." Diameter approximately 0.385 km. from mean, weighted H=19.7.
2010 XCNEODyS16052083-208311.2e-11-11.94-11.940NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2010-12-01.307 to 2010-12-01.366."
2010 XBJPL Sentry0100203613.0e-10-11.11-11.10JPL: "Analysis based on 13 observations spanning .18932 days (2010-Dec-01.34575 to 2010-Dec-01.53507)." Diameter approximately 0.005 km. from mean, weighted H=29.4.
2010 XANEODyS16052025-208045.28e-08-7.17-7.330NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010-12-01.193 to 2010-12-01.586."
2010 WD9JPL Sentry16052052-210971.6e-05-4.39-4.600JPL: "Analysis based on 26 observations spanning 1.0307 days (2010-Nov-30.47272 to 2010-Dec-01.50343)." Diameter approximately 0.065 km. from mean, weighted H=23.6.
2010 WC9NEODyS16052018-2089793.92e-06-4.05-4.210NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2010-11-30.081 to 2010-12-01.188."
2010 WA9NEODyS16052079-207915.8e-11-10.80-10.80NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010-11-30.270 to 2010-12-01.395."
2010 WZ8JPL Sentry16052069-209442.9e-07-4.56-4.750JPL: "Analysis based on 29 observations spanning 2.1084 days (2010-Nov-29.34132 to 2010-Dec-01.44976)." Diameter approximately 0.309 km. from mean, weighted H=20.2.
2010 WT8JPL Sentry1605210325.3e-09-7.16-7.400JPL: "Analysis based on 14 observations spanning 5.0251 days (2010-Nov-27.19228 to 2010-Dec-02.2174)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
2010 WH3JPL Sentry1605R E M O V E DJPL: Risk listing removed at 1050 UTC.
2010 WD3JPL Sentry16052014-2022352.8e-06-3.66-3.940JPL: "Analysis based on 11 observations spanning .10215 days (2010-Nov-28.11547 to 2010-Nov-28.217625)." Diameter approximately 0.089 km. from mean, weighted H=22.9.
2010 WC1JPL Sentry1605R E M O V E DJPL: Risk listing removed at 1056 UTC.
2010 VW194JPL Sentry16052042-2108274.3e-05-5.40-6.060JPL: "Analysis based on 30 observations spanning 16.099 days (2010-Nov-15.34197 to 2010-Dec-01.44077)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
NEODyS16052047-2089172.53e-05-5.58-6.020NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2010-11-15.343 to 2010-12-01.442."

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 2 December '10

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

2359Grabbed MPEC 2010-X27 - 2010 XQ - see above
Grabbed MPEC 2010-X28 - 2010 XR - see above
2326Grabbed MPEC 2010-X25 - 2010 XO - see above
Grabbed MPEC 2010-X26 - 2010 XP - see above
2115Noted that JPL Sentry has posted 2010 XN as an impact risk - see above
1934Grabbed MPEC 2010-X24 - 2010 XN - see above
1605Noted that JPL Sentry has updated its 2010 VW194 risk assessment - see above
Noted that NEODyS has updated its 2010 VW194 risk assessment - see above
Noted that NEODyS has posted 2010 WA9 as an impact risk - see above
Noted that JPL Sentry has removed 2010 WC1 as an impact risk - see above
Noted that NEODyS has posted 2010 WC9 as an impact risk - see above
Noted that JPL Sentry has posted 2010 WD3 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 WD9 risk assessment - see above
Noted that JPL Sentry has removed 2010 WH3 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 WT8 risk assessment - see above
Noted that JPL Sentry has updated its 2010 WZ8 risk assessment - see above
Noted that NEODyS has posted 2010 XA as an impact risk - see above
Noted that NEODyS has posted 2010 XC as an impact risk - see above
Noted that JPL Sentry has posted 2010 XJ as an impact risk - see above
Grabbed MPEC 2010-X17 - Daily Orbit Update - see above
Grabbed MPEC 2010-X18 - 2010 XG - see above
Grabbed MPEC 2010-X19 - 2010 XH - see above
Grabbed MPEC 2010-X20 - 2010 XJ - see above
Grabbed MPEC 2010-X21 - 2010 XK - see above
Grabbed MPEC 2010-X22 - 2010 XL - see above
Grabbed MPEC 2010-X23 - 2010 XM - see above
0505Grabbed MPEC 2010-X16 - 2010 XF - see above
0100Noted that JPL Sentry has posted 2010 XB as an impact risk - see above
0029Grabbed MPEC 2010-X14 - 2010 XD - see above
Grabbed MPEC 2010-X15 - 2010 XE - see above