Contents  on 1 December '10

Resources:

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Radar Astrometry  on 1 December '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2101 UTC when the database was dated 1 Dec.

NEOCP Activity  on 1 December '10

The MPC's NEO Confirmation Page has 16 listings: 5 new, 11 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new and eleven updated listings. All of these were "one nighters." The Tracking News counted a total of 29 listings on the NEOCP at some point on this day.

New MPECs  on 1 December '10

Minor Planet Electronic Circulars

There were thirteen MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-X13 - "23:56 UT" - 2010 XC


MPEC 2010-X12 - "23:29 UT" - 2010 XB


MPEC 2010-X11 - "21:23 UT" - 2010 XA


MPEC 2010-X10 - "16:54 UT" - 2010 WE9


MPEC 2010-X09 - "16:32 UT" - 1999 XM141


MPEC 2010-X08 - "12:00 UT" - 2010 WD9


MPEC 2010-X07 - "11:45 UT" - 2010 WC9


MPEC 2010-X06 - "11:33 UT" - 2010 WB9


MPEC 2010-X05 - "11:22 UT" - 2010 WA9


MPEC 2010-X04 - "11:12 UT" - 2010 WZ8


MPEC 2010-X03 - "11:00 UT" - 2010 WY8


<< DOU on 1 Dec. '10 >>  MPEC 2010-X02 - "07:12 UT" - Daily Orbit Update


MPEC 2010-X01 - "04:58 UT" - 2010 WW8

Observers  on 1 December '10

Eighteen observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2010-X02 -- 2010 UX6, 2010 US7, 2010 UM, 2010 TY54, 2010 TK19, 2010 SK15, 2010 RT80, 2010 RK43, 2010 RB130
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-X11 -- 2010 XA
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2010-X02, 2010-X06, 2010-X08 & 2010-X09 -- 2010 WD9, 2010 WB9, 2010 RP80, 2001 XF1, 1999 XM141, 86324, 65679, 48603, 22753, 216115, 170086, 137062, 5869, 5496, 4257
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2005 GC120
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2010-X02 & 2010-X04 -- 2010 WZ8, 2010 WV8
704LINEAR in New Mexico, 9 in MPECs 2010-X02, 2010-X04 & 2010-X09 -- 2010 WZ8, 2010 WV8, 2010 WQ7, 2010 WP8, 2010 WJ, 2010 TJ7, 1999 XM141, 152978, 1864
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2010-X03, 2010-X04, 2010-X05, 2010-X06, 2010-X07, 2010-X09, 2010-X10 & 2010-X11 -- 2010 XA, 2010 WZ8, 2010 WY8, 2010 WE9, 2010 WC9, 2010 WB9, 2010 WA9, 1999 XM141
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-X02 -- 2010 UY6
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2010-X01, 2010-X02, 2010-X03, 2010-X05, 2010-X06, 2010-X07, 2010-X08, 2010-X11, 2010-X12 & 2010-X13 -- 2010 XC, 2010 XB, 2010 XA, 2010 WY8, 2010 WW8, 2010 WD9, 2010 WC9, 2010 WB9, 2010 WA9, 2010 VK, 2008 VK14, 2004 YZ23, 53426, 52689
473Remanzacco Obs. in Italy, 1 in MPEC 2010-X02 -- 2010 WU8
H11Rodeo Obs. in New Mexico, 1 in MPEC 2010-X09 -- 1999 XM141
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2010-X01, 2010-X06 & 2010-X09 -- 2010 WW8, 2010 WB9, 1999 XM141
H36Sandlot Obs. in Kansas, 7 in MPECs 2010-X03, 2010-X04, 2010-X05, 2010-X07, 2010-X08, 2010-X09 & 2010-X10 -- 2010 WZ8, 2010 WY8, 2010 WE9, 2010 WD9, 2010 WC9, 2010 WA9, 1999 XM141
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2010-X02, 2010-X03 & 2010-X05 -- 2010 WY8, 2010 WS, 2010 WH3, 2010 WA9, 2010 VW75, 2010 VW194, 2010 VJ139, 2010 VF139, 2010 VE1, 2010 VA76, 2010 VA1, 2010 UK8, 2010 SO16, 2010 SL13, 2010 MF1, 2010 KH, 2010 JG88, 2004 BW1
I19Tanti Obs. in Argentina, 1 in MPEC 2010-X02 -- 2005 GC120
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-X02 -- 2010 WV8
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-X12 -- 2010 XB
C51WISE in Earth polar orbit, 1 in MPEC 2010-X10 -- 2010 WE9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 December '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2231 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 XAJPL Sentry23592025-2110471.3e-06-6.35-7.080JPL: "Analysis based on 12 observations spanning .39315 days (2010-Dec-01.19178 to 2010-Dec-01.58493)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2010 WD9JPL Sentry17142052-210962.0e-05-4.35-4.690JPL: "Analysis based on 23 observations spanning 1.0018 days (2010-Nov-30.47272 to 2010-Dec-01.47456)." Diameter approximately 0.066 km. from mean, weighted H=23.6.
2010 WC9JPL Sentry17142027-21102161.1e-06-5.13-5.700JPL: "Analysis based on 20 observations spanning 1.1065 days (2010-Nov-30.08059 to 2010-Dec-01.18705)." Diameter approximately 0.072 km. from mean, weighted H=23.4.
2010 WA9JPL Sentry17142048-2108111.6e-06-6.32-6.450JPL: "Analysis based on 16 observations spanning 1.1255 days (2010-Nov-30.26884 to 2010-Dec-01.39432)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
2010 WZ8JPL Sentry17142057-209345.4e-06-3.29-3.450JPL: "Analysis based on 19 observations spanning 2.1084 days (2010-Nov-29.34132 to 2010-Dec-01.44976)." Diameter approximately 0.303 km. from mean, weighted H=20.2.
2010 WW8NEODyS17142022-2085122.63e-09-9.80-10.430NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010-11-30.374 to 2010-11-30.440."
2010 WT8JPL Sentry03152020-2109821.8e-06-4.57-5.450JPL: "Analysis based on 13 observations spanning 3.0847 days (2010-Nov-27.19228 to 2010-Nov-30.27703)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2010 WH3JPL Sentry17142081-209421.1e-08-5.92-5.940JPL #2 for the day: "Analysis based on 25 observations spanning 4.0504 days (2010-Nov-27.2164 to 2010-Dec-01.26684)." Diameter approximately 0.260 km. from mean, weighted H=20.6.
NEODyS1714R E M O V E D-
2010 WE3JPL Sentry03442011-211020879.4e-05-4.73-5.530JPL: "Analysis based on 9 observations spanning .06216 days (2010-Nov-28.24382 to 2010-Nov-28.30598)." Diameter approximately 0.019 km. from mean, weighted H=26.2.
2010 WK1JPL Sentry01112035-2107144.0e-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 Sentry03152038-21102487.1e-05-5.81-6.630JPL: "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 WSJPL Sentry1714R E M O V E DJPL #2 for the day: Risk listing removed at 1058 UTC.
2010 VW194JPL Sentry17142042-2108244.4e-05-5.39-6.030JPL: "Analysis based on 27 observations spanning 15.127 days (2010-Nov-15.34197 to 2010-Nov-30.46944)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
NEODyS17142042-2089232.83e-05-5.52-5.990NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2010-11-15.343 to 2010-11-30.470."
2010 VA140JPL Sentry05402105-210933.1e-09-9.41-9.770JPL: "Analysis based on 15 observations spanning 1.0145 days (2010-Nov-15.31982 to 2010-Nov-16.33427)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2010 VQ139JPL Sentry02272015-21102661.1e-05-6.47-7.330JPL: "Analysis based on 11 observations spanning .04669 days (2010-Nov-14.32797 to 2010-Nov-14.37466)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2010 VP139JPL Sentry03442012-21108082.3e-04-5.66-6.940JPL: "Analysis based on 12 observations spanning .04588 days (2010-Nov-14.27911 to 2010-Nov-14.32499)." Diameter approximately 0.006 km. from mean, weighted H=29.0.
2010 VO139JPL Sentry02272016-21104426.9e-05-4.79-5.550JPL: "Analysis based on 11 observations spanning .19581 days (2010-Nov-14.22693 to 2010-Nov-14.42274)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
2010 VL65JPL Sentry01112066-210962.3e-05-6.62-6.850JPL: "Analysis based on 9 observations spanning 1.0466 days (2010-Nov-06.2625 to 2010-Nov-07.30909)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2010 VT21JPL Sentry01112056-208331.9e-08-9.12-9.170JPL: "Analysis based on 15 observations spanning .12630 days (2010-Nov-06.31164 to 2010-Nov-06.43794)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2010 VB1JPL Sentry04422086-210231.7e-06-5.39-5.400JPL: "Analysis based on 62 observations spanning 11.923 days (2010-Nov-02.27134 to 2010-Nov-14.19471)." Diameter approximately 0.073 km. from mean, weighted H=23.3.
2010 VQJPL Sentry01112034-2107541.7e-04-5.06-5.210JPL: "Analysis based on 31 observations spanning 9.8531 days (2010-Nov-01.34102 to 2010-Nov-11.194152)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
2010 UY7JPL Sentry03442066-2110422.2e-04-5.80-6.250JPL: "Analysis based on 65 observations spanning 6.9849 days (2010-Oct-30.19349 to 2010-Nov-06.17842)." Diameter approximately 0.007 km. from mean, weighted H=28.5.
2010 UKJPL Sentry05402068-2108287.7e-04-4.24-4.250JPL: "Analysis based on 79 observations spanning 14.713 days (2010-Oct-17.49652 to 2010-Nov-01.2099)." Diameter approximately 0.014 km. from mean, weighted H=26.8.
2010 UJJPL Sentry01582019-21103412.0e-04-4.42-5.290JPL: "Analysis based on 12 observations spanning 1.0144 days (2010-Oct-17.45081 to 2010-Oct-18.46516)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2010 UHJPL Sentry05112044-2109331.4e-05-6.18-7.000JPL: "Analysis based on 18 observations spanning 14.935 days (2010-Oct-17.41946 to 2010-Nov-01.35435)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2010 TW54JPL Sentry05112074-2107163.0e-05-6.14-6.170JPL: "Analysis based on 70 observations spanning 4.9304 days (2010-Oct-11.34885 to 2010-Oct-16.27929)." Diameter approximately 0.010 km. from mean, weighted H=27.5.
2010 RF12JPL Sentry02272095-2110345.3e-02-3.32-3.320JPL: "Analysis based on 320 observations spanning 3.1100 days (2010-Sep-05.40477 to 2010-Sep-08.514787)." Diameter approximately 0.007 km. from mean, weighted H=28.4.

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 1 December '10

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

2359Noted that JPL Sentry has posted 2010 XA as an impact risk - see above
Grabbed MPEC 2010-X12 - 2010 XB - see above
Grabbed MPEC 2010-X13 - 2010 XC - see above
2231Grabbed MPEC 2010-X11 - 2010 XA - see above
2101Noted Radar Astrometry database update - see above
1714Noted 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 JPL Sentry has posted 2010 WA9 as an impact risk - see above
Noted that JPL Sentry has posted 2010 WC9 as an impact risk - see above
Noted that JPL Sentry has posted 2010 WD9 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 WH3 risk assessment - see above
Noted that NEODyS has removed 2010 WH3 as an impact risk - see above
Noted that JPL Sentry has removed 2010 WS as an impact risk - see above
Noted that NEODyS has posted 2010 WW8 as an impact risk - see above
Noted that JPL Sentry has posted 2010 WZ8 as an impact risk - see above
Grabbed MPEC 2010-X02 - Daily Orbit Update - see above
Grabbed MPEC 2010-X03 - 2010 WY8 - see above
Grabbed MPEC 2010-X04 - 2010 WZ8 - see above
Grabbed MPEC 2010-X05 - 2010 WA9 - see above
Grabbed MPEC 2010-X06 - 2010 WB9 - see above
Grabbed MPEC 2010-X07 - 2010 WC9 - see above
Grabbed MPEC 2010-X08 - 2010 WD9 - see above
Grabbed MPEC 2010-X09 - 1999 XM141 - see above
Grabbed MPEC 2010-X10 - 2010 WE9 - see above
0540Noted that JPL Sentry has updated its 2010 UK risk assessment - see above
Noted that JPL Sentry has posted 2010 VA140 as an impact risk - see above
0511Noted that JPL Sentry has updated its 2010 TW54 risk assessment - see above
Noted that JPL Sentry has updated its 2010 UH risk assessment - see above
0508Grabbed MPEC 2010-X01 - 2010 WW8 - see above
0442Noted that JPL Sentry has reposted 2010 VB1 as an impact risk - see above
0413Noted that JPL Sentry has updated its 2010 WH3 risk assessment - see above
0344Noted that JPL Sentry has updated its 2010 UY7 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VP139 risk assessment - see above
Noted that JPL Sentry has updated its 2010 WE3 risk assessment - see above
0315Noted that JPL Sentry has updated its 2010 WC1 risk assessment - see above
Noted that JPL Sentry has updated its 2010 WT8 risk assessment - see above
0227Noted that JPL Sentry has updated its 2010 RF12 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VO139 risk assessment - see above
Noted that JPL Sentry has posted 2010 VQ139 as an impact risk - see above
0158Noted that JPL Sentry has updated its 2010 UJ risk assessment - see above
Noted that JPL Sentry has updated its 2010 WS risk assessment - see above
0111Noted that JPL Sentry has posted 2010 VL65 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 VQ risk assessment - see above
Noted that JPL Sentry has posted 2010 VT21 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 WK1 risk assessment - see above