Contents  on 18 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 18 February '10

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of nineteen 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 18 February '10

Minor Planet Electronic Circulars

As of last check at 2350 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-D46 - "22:30 UT" - 2010 DE1


MPEC 2010-D45 - "17:56 UT" - 2007 LV19


MPEC 2010-D44 - "17:54 UT" - 2009 EF3


MPEC 2010-D43 - "15:41 UT" - 2010 DJ1


MPEC 2010-D42 - "15:36 UT" - 2010 DH1


MPEC 2010-D41 - "15:31 UT" - 2010 DG1


MPEC 2010-D40 - "15:26 UT" - 2010 DF1


<< DOU on 18 Feb. '10 >>  MPEC 2010-D39 - "07:21 UT" - Daily Orbit Update

Observers  on 18 February '10

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 9 in MPECs 2010-D39, 2010-D41, 2010-D42 & 2010-D43 -- 2010 DJ1, 2010 DH1, 2010 DG1, 2010 CF19, 2010 CC19, 2010 CB19, 2010 BT3, 2006 BN6, 2002 XY38
703Catalina Sky Survey (CSS) in Arizona, 13 in MPEC 2010-D39 -- 2009 WO6, 2008 JG, 1996 BA1, 68216, 40267, 40263, 162882, 162038, 11066, 4544, 4015, 1865, 1864
G58Chabot Obs. in northern California, 4 in MPECs 2010-D39 & 2010-D43 -- 2010 DJ1, 2010 CL1, 2010 CF19, 2010 CB19
B84Cyclops Obs. in The Netherlands, 2 in MPEC 2010-D39 -- 27346, 2212
448Desert Moon Obs. in New Mexico, 5 in MPEC 2010-D39 -- 2010 BL2, 2010 BC3, 2006 EE1, 2004 XK4, 9950
J95Great Shefford Obs. in England, 2 in MPEC 2010-D39 -- 2010 CD55, 2010 CC19
046Klet Obs. in the Czech Republic, 8 in MPEC 2010-D39 -- 2010 CF19, 2010 CD19, 2010 BB3, 2005 MC, 2004 XD50, 2003 BT47, 2002 AJ129, 2001 PT9
J38La Vara Obs. in Spain, 1 in MPEC 2010-D39 -- 4015
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2010-D40, 2010-D41, 2010-D42 & 2010-D43 -- 2010 DJ1, 2010 DH1, 2010 DG1, 2010 DF1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D45 -- 2007 LV19
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2010-D39, 2010-D42, 2010-D43 & 2010-D46 -- 2010 DJ1, 2010 DH1, 2010 DE1, 2010 CO44, 2010 CM, 2010 CL19, 2010 BB3, 2006 AO4, 2005 UK1, 22753, 137052, 10165, 4015, 3288
E12Siding Spring Survey (SSS) in New South Wales, 10 in MPEC 2010-D39 -- 2010 DA, 2010 CT, 2010 CN1, 2009 SV171, 218863, 212359, 163132, 159686, 143947, 7822
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2010-D39, 2010-D40 & 2010-D41 -- 2010 DG1, 2010 DF1, 2008 GE1, 2007 CN26, 27031, 190161, 141053, 8567
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2010-D39, 2010-D40, 2010-D41 & 2010-D42 -- 2010 DM, 2010 DJ, 2010 DH1, 2010 DG1, 2010 DF1, 2010 DA, 2010 CS19, 2010 CR5, 2010 CQ19, 2010 CG19, 2004 FG11, 2001 RX11
926Tenagra II Obs. in Arizona, 5 in MPECs 2010-D40, 2010-D41, 2010-D42, 2010-D43 & 2010-D44 -- 2010 DJ1, 2010 DH1, 2010 DG1, 2010 DF1, 2009 EF3
0122Thierry Pauwels via Uccle Obs. in Belgium, 1 in MPEC 2010-D39 -- 153249
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 18 February '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. 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 DJ1JPL Sentry1801203111.5e-09-9.06-9.060JPL: "Analysis based on 25 observations spanning .94758 days (2010-Feb-17.40179 to 2010-Feb-18.34937)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2010 DH1JPL Sentry18012014-2106534.9e-08-4.17-4.600JPL: "Analysis based on 23 observations spanning .98082 days (2010-Feb-17.37743 to 2010-Feb-18.35825)." Diameter approximately 0.420 km. from mean, weighted H=19.5.
2010 DG1JPL Sentry1702207712.1e-10-9.35-9.350JPL: "Analysis based on 23 observations spanning 1.0763 days (2010-Feb-17.2105 to 2010-Feb-18.286763)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2010 DPNEODyS14472020-205961.55e-10-6.20-6.470NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2010/02/16.522 to 2010/02/17.516."
2010 DMJPL Sentry14472030-210871.7e-09-4.88-5.110JPL: "Analysis based on 16 observations spanning 1.9256 days (2010-Feb-16.32523 to 2010-Feb-18.25086)." Diameter approximately 0.617 km. from mean, weighted H=18.8.
NEODyS14472030-206967.8e-10-5.04-5.270NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010/02/16.326 to 2010/02/18.252."
2010 DJJPL Sentry1447R E M O V E DJPL: Risk listing removed at 1133 UTC.
2010 DAJPL Sentry1447R E M O V E DJPL: Risk listing removed at 1101 UTC.
NEODyS1447R E M O V E D-
2010 CH55NEODyS14472016-2088447.25e-08-4.04-4.750NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2010/02/15.467 to 2010/02/17.483."
2010 CS19JPL Sentry1447210442.8e-05-6.40-6.460JPL: "Analysis based on 26 observations spanning 2.0445 days (2010-Feb-15.32692 to 2010-Feb-17.37139)." Diameter approximately 0.009 km. from mean, weighted H=28.0.
NEODyS1447208811.04e-08-9.74-9.740NEODyS: "Based on 27 optical observations (of which 1 are rejected as outliers) from 2010/02/15.328 to 2010/02/17.372."
2010 CQ19JPL Sentry1447R E M O V E DJPL: Risk listing removed at 1051 UTC.
NEODyS1447R E M O V E D-
2010 CG19JPL Sentry14472019-209054.9e-08-4.31-4.610JPL: "Analysis based on 19 observations spanning 3.9260 days (2010-Feb-14.28339 to 2010-Feb-18.20934)." Diameter approximately 0.370 km. from mean, weighted H=19.8.
NEODyS14472019-208764.9e-08-4.28-4.630NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2010/02/14.284 to 2010/02/18.210."
2010 CR5JPL Sentry14472030-2107151.5e-07-3.99-4.310JPL: "Analysis based on 32 observations spanning 8.8621 days (2010-Feb-09.3273 to 2010-Feb-18.1894)." Diameter approximately 0.384 km. from mean, weighted H=19.7.
NEODyS14472019-2087161.29e-07-4.02-4.320NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2010/02/09.328 to 2010/02/18.190."

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 18 February '10

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

2302Grabbed MPEC 2010-D46 - 2010 DE1 - see above
1802Grabbed MPEC 2010-D44 - 2009 EF3 - see above
Grabbed MPEC 2010-D45 - 2007 LV19 - see above
1801Noted that JPL Sentry has posted 2010 DH1 as an impact risk - see above
Noted that JPL Sentry has posted 2010 DJ1 as an impact risk - see above
1702Noted that JPL Sentry has posted 2010 DG1 as an impact risk - see above
1612Grabbed MPEC 2010-D42 - 2010 DH1 - see above
Grabbed MPEC 2010-D43 - 2010 DJ1 - see above
1536Grabbed MPEC 2010-D40 - 2010 DF1 - see above
Grabbed MPEC 2010-D41 - 2010 DG1 - see above
1447Noted that JPL Sentry has posted 2010 CG19 as an impact risk - see above
Noted that NEODyS has updated its 2010 CG19 risk assessment - see above
Noted that NEODyS has posted 2010 CH55 as an impact risk - see above
Noted that JPL Sentry has removed 2010 CQ19 as an impact risk - see above
Noted that NEODyS has removed 2010 CQ19 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 CR5 risk assessment - see above
Noted that NEODyS has updated its 2010 CR5 risk assessment - see above
Noted that JPL Sentry has updated its 2010 CS19 risk assessment - see above
Noted that NEODyS has updated its 2010 CS19 risk assessment - see above
Noted that JPL Sentry has removed 2010 DA as an impact risk - see above
Noted that NEODyS has removed 2010 DA as an impact risk - see above
Noted that JPL Sentry has removed 2010 DJ as an impact risk - see above
Noted that JPL Sentry has updated its 2010 DM risk assessment - see above
Noted that NEODyS has posted 2010 DM as an impact risk - see above
Noted that NEODyS has posted 2010 DP as an impact risk - see above
Grabbed MPEC 2010-D39 - Daily Orbit Update - see above