Contents  on 4 March '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 4 March '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two 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 by Birtwhistle et al. at Suno Observatory.

New MPECs  on 4 March '09

Minor Planet Electronic Circulars

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


<< DOU on 4 Mar. '09 >>  MPEC 2009-E38 - "07:09 UT" - Daily Orbit Update

Observers  on 4 March '09

Sixteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 36 in MPEC 2009-E38 -- 2009 EZ, 2009 EW, 2009 EU, 2009 ER, 2009 EG1, 2009 EF1, 2009 ED1, 2009 EB1, 2009 DZ42, 2009 DV43, 2009 DV42, 2009 DT10, 2009 DR36, 2009 DR3, 2009 DQ4, 2009 DN45, 2009 DN1, 2009 DM45, 2009 DM1, 2009 DL46, 2009 DL1, 2009 DH39, 2009 DG9, 2009 DF1, 2009 DE47, 2009 DD1, 2009 DC43, 2009 DC1, 2009 CS1, 2009 BL2, 2009 BH81, 2009 AF16, 2008 UZ94, 2008 UV91, 2008 TK157, 2008 OB9
432Boambee Obs. in New South Wales, 6 in MPEC 2009-E38 -- 2008 QT3, 2000 BL19, 16834, 4957, 4055, 1917
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-E38 -- 2008 UV91, 2008 EE
J95Great Shefford Obs. in England, 1 in MPEC 2009-E38 -- 2008 UV91
A17Guidestar Obs. in Germany, 3 in MPEC 2009-E38 -- 2009 CR2, 2001 CK32, 162080
704LINEAR in New Mexico, 6 in MPEC 2009-E38 -- 2009 EZ, 2009 DL1, 2009 DH39, 2006 GQ2, 2005 SG19, 1996 BZ3
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-E38 -- 2008 UV91
474Mt. John Obs. in New Zealand, 4 in MPEC 2009-E38 -- 2009 EZ, 2009 ED1, 2009 DS36, 2009 DQ4
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-E38 -- 2009 DK46, 2009 DA45
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E38 -- 2009 EZ
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-E38 -- 2008 UV91
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-E38 -- 5604
510Siegen Obs. in Germany, 1 in MPEC 2009-E38 -- 2009 DD45
691Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2009-E38 -- 2009 DL1, 2006 SD6, 2005 GW119, 2004 VV, 2000 ST20, 2000 GU127, 22771, 206910, 138325, 8034, 3551, 3102
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-E38 -- 2009 DO1, 2009 DL46, 2009 DE47, 2009 DC43
0122Thierry Pauwels via Uccle Obs. in Belgium, 1 in MPEC 2009-E38 -- 2001 CK32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 March '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 EK1JPL Sentry03062016-21081007.2e-07-4.26-4.680JPL: "Analysis based on 17 observations spanning 1.0678 days (2009-Mar-02.34255 to 2009-Mar-03.41031)." Diameter approximately 0.178 km. from mean, weighted H=21.4.
2009 EJ1NEODyS16142025-2090301.72e-07-8.26-8.840NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/03/03.280 to 2009/03/03.605."
2009 EH1NEODyS16142040-2076132.76e-08-8.82-8.930NEODyS: "Based on 19 optical observations (of which 1 are rejected as outliers) from 2009/03/03.258 to 2009/03/03.580."
2009 EWJPL Sentry15362063-2081221.6e-05-5.55-5.760JPL: "Analysis based on 25 observations spanning 1.0561 days (2009-Mar-02.29194 to 2009-Mar-03.348)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
NEODyS15362063-2081221.7e-05-5.53-5.730NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/03/02.293 to 2009/03/03.349."
2009 EVNEODyS15362010-20902362.69e-08-4.19-4.900NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/03/02.266 to 2009/03/03.153."
2009 ESNEODyS15362016-2083171.55e-08-5.12-5.610NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/03/02.213 to 2009/03/03.217."
2009 DL46JPL Sentry1536R E M O V E DJPL: Risk listing removed at 1134 UTC.
2009 DC43NEODyS1536R E M O V E D-
2009 DZ42JPL Sentry1536207311.3e-10-7.41-7.410JPL: "Analysis based on 52 observations spanning 4.9185 days (2009-Feb-26.12849 to 2009-Mar-03.046956)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS1536207311.4e-11-8.40-8.400NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/03/03.048."

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 4 March '09

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

1614Noted that NEODyS has posted 2009 EH1 as an impact risk - see above
Noted that NEODyS has posted 2009 EJ1 as an impact risk - see above
1536Noted that NEODyS has removed 2009 DC43 as an impact risk - see above
Noted that JPL Sentry has removed 2009 DL46 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DZ42 risk assessment - see above
Noted that NEODyS has updated its 2009 DZ42 risk assessment - see above
Noted that NEODyS has posted 2009 ES as an impact risk - see above
Noted that NEODyS has posted 2009 EV as an impact risk - see above
Noted that JPL Sentry has updated its 2009 EW risk assessment - see above
Noted that NEODyS has posted 2009 EW as an impact risk - see above
Grabbed MPEC 2009-E38 - Daily Orbit Update - see above
0306Noted that JPL Sentry has posted 2009 EK1 as an impact risk - see above