Contents  on 20 February '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 20 February '10

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. So far The Tracking News has counted a total of twelve 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 20 February '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-D57 - "15:00 UT" - 2010 DE2


<< DOU on 20 Feb. '10 >>  MPEC 2010-D56 - "07:22 UT" - Daily Orbit Update

Observers  on 20 February '10

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 3 in MPEC 2010-D56 -- 86067, 54789, 27346
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 14 in MPEC 2010-D56 -- 2010 DL, 2010 DJ1, 2010 DH1, 2010 DG1, 2010 DF, 2010 CN44, 2010 CJ18, 2010 CH19, 2010 CG19, 2010 CF19, 2010 CD55, 2010 CC19, 2010 BU2, 2010 AN61
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2010-D56 & 2010-D57 -- 2010 DE2, 2010 CM44
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-D56 -- 2010 CD19, 1998 OK1, 1993 RA, 141525
J95Great Shefford Obs. in England, 2 in MPEC 2010-D56 -- 2010 DW1, 2010 DJ1
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2010-D56 -- 2009 UN3, 2001 PT9, 2000 CO101, 54789
704LINEAR in New Mexico, 1 in MPEC 2010-D56 -- 2010 DO
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2010-D56 -- 2010 DJ1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D56 -- 2009 OF
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2010-D56 -- 2010 CQ19, 230420, 4015
H23Pear Tree Obs. in Florida, 1 in MPEC 2010-D56 -- 2002 AJ129
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2010-D56 -- 2009 XC2, 2009 UV18, 2009 UN3, 2004 TB18, 229007
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-D57 -- 2010 DE2
204Schiaparelli Obs. in Italy, 8 in MPEC 2010-D56 -- 2010 CK1, 2010 CA, 2009 UN3, 2008 EE, 2003 BT47, 2002 NW16, 2002 AJ129, 2001 PT9
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-D56 -- 26760
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2010-D56 -- 2010 DP, 2010 DM, 2010 DJ1, 2010 DG1, 2010 CN44, 2010 CH55, 2010 CG19
926Tenagra II Obs. in Arizona, 11 in MPECs 2010-D56 & 2010-D57 -- 2010 DZ1, 2010 DX1, 2010 DJ1, 2010 DE2, 2010 DC, 2010 CO19, 2010 CK1, 2010 CJ18, 2010 CF19, 2010 CD55, 2010 CC19
C51WISE in Earth polar orbit, 6 in MPEC 2010-D56 -- 2010 CH18, 2010 AJ30, 2009 UX17, 2008 EV5, 2008 CN1, 2002 YF4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 February '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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 DW1JPL Sentry1640R E M O V E DJPL #2 for the day: Risk listing removed at 1132 UTC.
2010 DG1JPL Sentry16402027-204224.7e-09-7.41-7.440JPL: "Analysis based on 28 observations spanning 2.1136 days (2010-Feb-17.2105 to 2010-Feb-19.324051)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
NEODyS16402027-204221.12e-09-8.15-8.380NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/02/17.211 to 2010/02/19.325."
2010 DMJPL Sentry16402030-210863.6e-09-4.55-4.720JPL: "Analysis based on 22 observations spanning 2.9669 days (2010-Feb-16.32523 to 2010-Feb-19.29217)." Diameter approximately 0.697 km. from mean, weighted H=18.4.
NEODyS16402030-206131.64e-09-4.69-4.750NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2010/02/16.326 to 2010/02/19.293."
2010 CH55JPL Sentry16402028-204281.9e-09-5.70-6.430JPL: "Analysis based on 35 observations spanning 3.8977 days (2010-Feb-15.466 to 2010-Feb-19.36371)." Diameter approximately 0.529 km. from mean, weighted H=19.0.
NEODyS1640R E M O V E D-
2010 CN44JPL Sentry16402040-207164.1e-07-3.58-3.720JPL: "Analysis based on 21 observations spanning 4.0584 days (2010-Feb-15.11003 to 2010-Feb-19.16839)." Diameter approximately 0.480 km. from mean, weighted H=19.2.
NEODyS16402040-207032.94e-07-3.79-4.020NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2010/02/15.111 to 2010/02/19.169."
2010 CQ19JPL Sentry1640210515.0e-08-8.53-8.530JPL: "Analysis based on 22 observations spanning 4.0576 days (2010-Feb-15.27907 to 2010-Feb-19.33667)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2010 CG19JPL Sentry1640R E M O V E DJPL: Risk listing removed at 1049 UTC.
NEODyS1640R E M O V E D-
2010 CAJPL Sentry1640202215.2e-06-4.33-4.330JPL: "Analysis based on 61 observations spanning 8.9008 days (2010-Feb-05.19638 to 2010-Feb-14.097229)." Diameter approximately 0.043 km. from mean, weighted H=24.5.

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 20 February '10

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

1640Noted that JPL Sentry has updated its 2010 CA risk assessment - see above
Noted that JPL Sentry has removed 2010 CG19 as an impact risk - see above
Noted that NEODyS has removed 2010 CG19 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 CH55 risk assessment - see above
Noted that NEODyS has removed 2010 CH55 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 CN44 risk assessment - see above
Noted that NEODyS has updated its 2010 CN44 risk assessment - see above
Noted that JPL Sentry has updated its 2010 CQ19 risk assessment - see above
Noted that JPL Sentry has updated its 2010 DG1 risk assessment - see above
Noted that NEODyS has updated its 2010 DG1 risk assessment - see above
Noted that JPL Sentry has updated its 2010 DM risk assessment - see above
Noted that NEODyS has updated its 2010 DM risk assessment - see above
Noted that JPL Sentry has removed 2010 DW1 as an impact risk - see above
Grabbed MPEC 2010-D56 - Daily Orbit Update - see above
Grabbed MPEC 2010-D57 - 2010 DE2 - see above
0007Noted that JPL Sentry has posted 2010 DW1 as an impact risk - see above