Contents  on 28 February '09

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 28 February '09

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. Of these, six were "one nighters." So far The Tracking News has counted a total of fifteen listings on the NEOCP at some point today.

New MPECs  on 28 February '09

Minor Planet Electronic Circulars

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


MPEC 2009-D82 - "22:30 UT" - 2009 DN45


MPEC 2009-D81 - "22:24 UT" - 2009 DM45


MPEC 2009-D80 - "15:05 UT" - 2009 DD45


MPEC 2009-D79 - "14:59 UT" - 2009 DC45


MPEC 2009-D78 - "14:57 UT" - 2009 DB45


MPEC 2009-D77 - "14:52 UT" - 2009 DA45


<< DOU on 28 Feb. '09 >>  MPEC 2009-D76 - "07:08 UT" - Daily Orbit Update

Observers  on 28 February '09

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
B88Bigmuskie Obs., 1 in MPEC 2009-D76 -- 2006 BC10
235CAST Obs. in Italy, 1 in MPEC 2009-D81 -- 2009 DM45
B09Capannoli Obs. in Italy, 4 in MPEC 2009-D76 -- 2009 DR3, 162900, 4179, 3122
703Catalina Sky Survey (CSS) in Arizona, 24 in MPECs 2009-D76, 2009-D79 & 2009-D82 -- 2009 DN45, 2009 DH39, 2009 DD1, 2009 DD, 2009 DC45, 2009 CW1, 2009 CO5, 2009 CN5, 2009 BD2, 2008 EE, 2005 WS55, 2005 NJ1, 1991 JW, 55532, 36284, 22771, 162080, 155341, 144411, 142348, 138175, 5332, 3122, 2329
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-D76 -- 85867
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-D81 -- 2009 DM45
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 2 in MPECs 2009-D77 & 2009-D78 -- 2009 DB45, 2009 DA45
J95Great Shefford Obs. in England, 2 in MPECs 2009-D81 & 2009-D82 -- 2009 DN45, 2009 DM45
704LINEAR in New Mexico, 13 in MPEC 2009-D76 -- 2009 DS43, 2009 DO4, 2009 DF1, 2009 CV5, 2009 CS, 2008 QT3, 2006 GQ2, 2005 SG19, 206910, 161989, 141495, 4055, 2329
B33Libbiano Obs. in Italy, 1 in MPEC 2009-D81 -- 2009 DM45
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2009-D77, 2009-D78 & 2009-D79 -- 2009 DC45, 2009 DB45, 2009 DA45
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-D76 -- 2009 DH39
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-D76, 2009-D78 & 2009-D79 -- 2009 DC45, 2009 DB45, 2002 EB3, 206378, 6569, 4179, 3122
A24New Millennium Obs. in Italy, 1 in MPEC 2009-D76 -- 1620
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-D79 -- 2009 DC45
B04Saint-Barthelemy Obs. in Italy, 3 in MPECs 2009-D79, 2009-D81 & 2009-D82 -- 2009 DN45, 2009 DM45, 2009 DC45
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-D76 -- 2008 YE29
204Schiaparelli Obs. in Italy, 9 in MPEC 2009-D76 -- 2009 DN1, 2009 DF1, 2009 CZ2, 2009 CV5, 2009 CV, 2009 CG, 2008 EE, 2000 BL19, 1999 AQ10
E12Siding Spring Survey (SSS) in New South Wales, 10 in MPECs 2009-D76, 2009-D80 & 2009-D81 -- 2009 DT10, 2009 DQ4, 2009 DM45, 2009 DH39, 2009 DD45, 2009 CC3, 2009 BE77, 2008 EY5, 1998 FJ74, 32906
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2009-D76 & 2009-D77 -- 2009 DA45, 1996 BZ3, 99935
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2009-D76, 2009-D77, 2009-D78 & 2009-D79 -- 2009 DZ42, 2009 DS10, 2009 DO1, 2009 DC45, 2009 DC12, 2009 DB45, 2009 DA45, 2009 DA1, 2009 CT1, 2009 CS5, 2009 CR5, 2008 WZ13, 2006 JU41, 2005 YV128, 2004 MQ1, 2003 RW10, 2002 JR9, 2000 CK59
B01Taunus Obs. in Germany, 1 in MPEC 2009-D81 -- 2009 DM45
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 February '09

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
2009 DB45JPL Sentry17302023-2093208.0e-09-5.24-5.910JPL: "Analysis based on 18 observations spanning 1.0439 days (2009-Feb-27.25736 to 2009-Feb-28.30131)." Diameter approximately 0.450 km. from mean, weighted H=19.4.
2009 DA45JPL Sentry17302041-208153.2e-09-7.39-7.840JPL: "Analysis based on 21 observations spanning 1.1293 days (2009-Feb-27.16081 to 2009-Feb-28.29006)." Diameter approximately 0.100 km. from mean, weighted H=22.7.
2009 DV43NEODyS16002019-2088143.1e-08-6.30-6.540NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/02/27.295 to 2009/02/27.883."
2009 DT43NEODyS1600204413.45e-06-6.10-6.100NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/02/27.416 to 2009/02/27.533."
2009 DS43JPL Sentry16002014-2107399.6e-08-6.59-6.970JPL: "Analysis based on 19 observations spanning .19886 days (2009-Feb-27.26402 to 2009-Feb-27.46288)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
NEODyS16002014-2090514.09e-08-6.91-7.320NEODyS: "Based on 24 optical observations (of which 5 are rejected as outliers) from 2009/02/27.265 to 2009/02/27.464."
2009 DC43NEODyS16002012-20891337.08e-08-3.12-3.870NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/02/26.500 to 2009/02/27.500."
2009 DZ42JPL Sentry16002073-210636.5e-07-3.72-3.900JPL: "Analysis based on 42 observations spanning 2.0156 days (2009-Feb-26.12849 to 2009-Feb-28.14414)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS16002073-207725.28e-07-3.84-4.000NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/02/28.145."
2009 DA1NEODyS1600R E M O V E D-

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 28 February '09

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

2301Grabbed MPEC 2009-D81 - 2009 DM45 - see above
Grabbed MPEC 2009-D82 - 2009 DN45 - see above
1730Noted that JPL Sentry has posted 2009 DA45 as an impact risk - see above
Noted that JPL Sentry has posted 2009 DB45 as an impact risk - see above
1600Noted that NEODyS has removed 2009 DA1 as an impact risk - see above
Noted that NEODyS has posted 2009 DC43 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DS43 risk assessment - see above
Noted that NEODyS has posted 2009 DS43 as an impact risk - see above
Noted that NEODyS has posted 2009 DT43 as an impact risk - see above
Noted that NEODyS has posted 2009 DV43 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DZ42 risk assessment - see above
Noted that NEODyS has posted 2009 DZ42 as an impact risk - see above
Grabbed MPEC 2009-D76 - Daily Orbit Update - see above
Grabbed MPEC 2009-D77 - 2009 DA45 - see above
Grabbed MPEC 2009-D78 - 2009 DB45 - see above
Grabbed MPEC 2009-D79 - 2009 DC45 - see above
Grabbed MPEC 2009-D80 - 2009 DD45 - see above