Comet 103P/Hartley 2 viewed from EPOXI Deep Impact 
on 4 Nov. 2010. Credit: NASA/JPL/UM.

The University of Maryland and NASA report today that, contrary to previous belief "that water vapor from water ice was the propulsive force [it is] solar heating of subsurface frozen carbon dioxide (dry ice), directly to a gas [that] is powering the many jets of material coming from [103P/Hartley 2, something that] ground based telescopes can't detect ... and current space telescopes aren't tuned to look for." Image credit: NASA/JPL/UM.


Contents  on 11 November '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 11 November '10

The MPC's NEO Confirmation Page has 10 listings: 4 new, 6 updated

When last checked at 2303 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, seven were "one nighters." The Tracking News counted a total of fourteen listings on the NEOCP at some point on this day.

New MPECs  on 11 November '10

Minor Planet Electronic Circulars

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


<< DOU on 11 Nov. '10 >>  MPEC 2010-V115 - "07:12 UT" - Daily Orbit Update


MPEC 2010-V114 - "05:07 UT" - 2010 VQ98


MPEC 2010-V113 - "05:03 UT" - 2010 VP98


MPEC 2010-V112 - "02:10 UT" - 2010 VO98


MPEC 2010-V111 - "01:15 UT" - 2010 VN98

Observers  on 11 November '10

A total of 23 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2010-V115 -- 2010 VZ, 2010 VY, 2010 VV21, 2010 VR, 2010 VQ21, 2010 VO, 2010 VH1, 2010 VF1, 2010 VE, 2010 VD72, 2010 VC1, 2010 VB72, 2010 VB1, 2010 VB, 2010 UQ7, 2010 UA7, 2010 TP55, 2010 TL, 2010 TJ7, 2010 TF54, 2010 SA17
300Bisei Spaceguard Center in Japan, 12 in MPEC 2010-V115 -- 2010 UX6, 2010 TX168, 2010 TC55, 2010 PM10, 2010 LY63, 2007 RU17, 2003 UV11, 219071, 154029, 137062, 137032, 2212
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2010-V114 & 2010-V115 -- 2010 VQ98, 2010 UH7, 2010 NW117, 2007 TD71, 2006 BG, 2001 TX44, 96590, 65679, 250162, 21374, 177255, 169352, 12923, 3288
G58Chabot Obs. in northern California, 2 in MPEC 2010-V115 -- 2010 UF7, 88959
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-V111 -- 2010 VN98
J95Great Shefford Obs. in England, 1 in MPEC 2010-V115 -- 2010 UE51
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2010-V115 -- 2010 TC55, 2010 SC41, 2002 VE68, 2212
951Highworth Obs. in England, 3 in MPEC 2010-V115 -- 2010 TX168, 2010 TJ7, 2007 VC138
046Klet Obs. in the Czech Republic, 2 in MPEC 2010-V115 -- 2010 TX168, 2010 SD13
704LINEAR in New Mexico, 25 in MPECs 2010-V111 & 2010-V115 -- 2010 VY71, 2010 VT11, 2010 VN98, 2010 VN65, 2010 VM65, 2010 UQ7, 2010 UE51, 2010 TJ54, 2010 TC55, 2010 TC47, 2010 TA178, 1999 XR35, 1997 US2, 36236, 249595, 219071, 168378, 154300, 152978, 137062, 137032, 100926, 5869, 4688, 1580
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2010-V111, 2010-V112, 2010-V113, 2010-V114 & 2010-V115 -- 2010 VX39, 2010 VQ98, 2010 VP98, 2010 VO98, 2010 VN98, 2010 VB1, 2010 UR7
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-V115 -- 2010 TQ54
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2010-V112, 2010-V113 & 2010-V115 -- 2010 VP98, 2010 VO98, 2010 TA178, 2010 SC41, 2007 FS35, 2006 UP, 85867, 52762
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2010-V115 -- 2010 UO7, 2010 UM
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-V111 -- 2010 VN98
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-V111 -- 2010 VN98
204Schiaparelli Obs. in Italy, 3 in MPECs 2010-V112, 2010-V114 & 2010-V115 -- 2010 VQ98, 2010 VO98, 2010 QE2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-V115 -- 2008 EL
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-V115 -- 2010 PM10, 243025
291Spacewatch 1.8m telescope in Arizona, 19 in MPEC 2010-V115 -- 2010 VW75, 2010 VO, 2010 VH1, 2010 VG1, 2010 VC72, 2010 VB72, 2010 VA12, 2010 UT7, 2010 UK8, 2010 UB8, 2010 TS149, 2010 TP55, 2010 TM167, 2010 TK54, 2010 TA55, 2010 HQ80, 2004 BJ86, 2000 JQ66, 228502
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-V115 -- 4954
C51WISE in Earth polar orbit, 2 in MPEC 2010-V115 -- 66146, 6239
718Wiggins Obs. in Utah, 1 in MPEC 2010-V115 -- 2010 UE51
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 November '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2303 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 VQ98JPL Sentry16262071-2105245.3e-04-5.06-5.450JPL: "Analysis based on 16 observations spanning .69601 days (2010-Nov-10.43786 to 2010-Nov-11.13387)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
NEODyS16262068-2089152.51e-04-5.39-5.450NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010-11-10.439 to 2010-11-11.135."
2010 VW75NEODyS16262042-204211.5e-10-8.16-8.160NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2010-11-08.138 to 2010-11-11.094."
JPL Sentry1626R E M O V E DJPL: Risk listing removed at 1130 UTC.
2010 VC72JPL Sentry16262015-21102183.8e-06-4.15-4.380JPL: "Analysis based on 8 observations spanning 1.9061 days (2010-Nov-08.48226 to 2010-Nov-10.38833)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
NEODyS16262015-2085201.6e-06-4.48-4.670NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2010-11-08.483 to 2010-11-10.389."
2010 VB72JPL Sentry1626R E M O V E DJPL: Risk listing removed at 1127 UTC.
NEODyS1626R E M O V E D-
2010 VB1JPL Sentry16262034-2110491.5e-05-4.17-4.600JPL: "Analysis based on 42 observations spanning 8.1104 days (2010-Nov-02.27134 to 2010-Nov-10.38174)." Diameter approximately 0.075 km. from mean, weighted H=23.3.
NEODyS16262034-2088319.0e-06-4.29-4.60NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2010-11-02.272 to 2010-11-10.383."
2010 VZJPL Sentry1626R E M O V E DJPL: Risk listing removed at 1130 UTC.
2010 UR7JPL Sentry16262079-208632.4e-06-6.88-7.210JPL: "Analysis based on 49 observations spanning 11.238 days (2010-Oct-30.16358 to 2010-Nov-10.40179)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
NEODyS16262079-208642.33e-06-6.88-7.220NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2010-10-30.164 to 2010-11-10.403."

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 11 November '10

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

1626Noted that JPL Sentry has updated its 2010 UR7 risk assessment - see above
Noted that NEODyS has updated its 2010 UR7 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VB1 risk assessment - see above
Noted that NEODyS has updated its 2010 VB1 risk assessment - see above
Noted that JPL Sentry has removed 2010 VB72 as an impact risk - see above
Noted that NEODyS has removed 2010 VB72 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 VC72 risk assessment - see above
Noted that NEODyS has updated its 2010 VC72 risk assessment - see above
Noted that JPL Sentry has posted 2010 VQ98 as an impact risk - see above
Noted that NEODyS has posted 2010 VQ98 as an impact risk - see above
Noted that JPL Sentry has removed 2010 VW75 as an impact risk - see above
Noted that NEODyS has updated its 2010 VW75 risk assessment - see above
Noted that JPL Sentry has removed 2010 VZ as an impact risk - see above
Grabbed MPEC 2010-V115 - Daily Orbit Update - see above
0532Grabbed MPEC 2010-V113 - 2010 VP98 - see above
Grabbed MPEC 2010-V114 - 2010 VQ98 - see above
0214Grabbed MPEC 2010-V111 - 2010 VN98 - see above
Grabbed MPEC 2010-V112 - 2010 VO98 - see above