Contents  on 2 March '09


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 2 March '09

The MPC's NEO Confirmation Page has 19 listings: 1 new, 18 updated

When last checked at 2302 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and eighteen updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 24 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 2 March '09

Minor Planet Electronic Circulars

As of last check at 2302 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-E14 - "12:17 UT" - 2009 ED

MPEC 2009-E13 - "12:09 UT" - 2009 DE47

MPEC 2009-E12 - "12:06 UT" - 2009 DD47

<< DOU on 2 Mar. '09 >>  MPEC 2009-E11 - "07:08 UT" - Daily Orbit Update

MPEC 2009-E10 - "03:56 UT" - 2009 DD45

Observers  on 2 March '09

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
I77CEAMIG-REA in Brazil, 1 in MPEC 2009-E10 -- 2009 DD45
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-E11 -- 2009 DT43
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-E12 -- 2009 DD47
J95Great Shefford Obs. in England, 6 in MPECs 2009-E11, 2009-E12 & 2009-E13 -- 2009 DT43, 2009 DS43, 2009 DM45, 2009 DE47, 2009 DD47, 2009 DA43
A17Guidestar Obs. in Germany, 1 in MPEC 2009-E12 -- 2009 DD47
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-E11 -- 2009 DD45
857Iowa Robotic Obs. in Arizona, 1 in MPEC 2009-E11 -- 4179
H05Kline Obs. in Colorado, 1 in MPEC 2009-E11 -- 2009 DM45
704LINEAR in New Mexico, 14 in MPECs 2009-E11, 2009-E12 & 2009-E13 -- 2009 DV43, 2009 DJ46, 2009 DE47, 2009 DD47, 2009 DD1, 2008 RM98, 2004 EU9, 1991 JW, 52768, 22771, 203217, 155336, 12711, 3103
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2009-E11, 2009-E12 & 2009-E14 -- 2009 ED, 2009 DV43, 2009 DD47
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-E11 & 2009-E14 -- 2009 ED, 2009 DR3, 2009 DD1, 2009 DC12, 2009 DB12, 2009 CX2, 2008 SC85, 2004 FM17
J93Mt. Tuffley Obs. in England, 5 in MPEC 2009-E11 -- 85953, 162900, 14402, 3554, 1036
A24New Millennium Obs. in Italy, 5 in MPEC 2009-E11 -- 2005 TZ51, 85236, 162679, 4183, 1620
A32Panker Obs. in Germany, 3 in MPEC 2009-E11 -- 2008 EE5, 207398, 1627
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E12 -- 2009 DD47
A41Rezman Obs. in Slovenia, 16 in MPEC 2009-E11 -- 2008 YE29, 2008 QT3, 2008 EE, 2007 BT2, 2003 YX1, 52768, 36284, 22753, 203217, 162900, 101873, 7358, 4179, 3554, 1917, 1863
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-E12 & 2009-E13 -- 2009 DE47, 2009 DD47
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-E12 -- 2009 DD47
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2009-E11 -- 2005 NJ1, 2002 PG80, 154589, 141495, 3122
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2009-E11 & 2009-E12 -- 2009 DZ42, 2009 DT43, 2009 DD47, 2009 CA3, 2009 BH58, 2003 SJ84
I13Washington D.C. Obs. in Washington, D.C., 1 in MPEC 2009-E11 -- 4179
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 March '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2302 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.





Notes for Today's Latest Risk Assessments
2009 DE47JPL Sentry15002011-2106673.6e-08-3.20-3.290JPL: "Analysis based on 11 observations spanning 1.9616 days (2009-Feb-28.43091 to 2009-Mar-02.39247)." Diameter approximately 0.986 km. from mean, weighted H=17.7.
2009 DL46JPL Sentry01212029-2104225.3e-08-5.47-5.770JPL: "Analysis based on 22 observations spanning .96725 days (2009-Feb-28.41984 to 2009-Mar-01.38709)." Diameter approximately 0.194 km. from mean, weighted H=21.2.
2009 DT43JPL Sentry1500R E M O V E DJPL: Risk listing removed at 0950 UTC.
NEODyS1500R E M O V E D-
2009 DZ42NEODyS1501207314.3e-09-5.92-5.920NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/03/02.111."
JPL Sentry1500207311.4e-08-5.38-5.380JPL: "Analysis based on 45 observations spanning 3.9822 days (2009-Feb-26.12849 to 2009-Mar-02.11068)." Diameter approximately 0.410 km. from mean, weighted H=19.6.

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 2 March '09

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

1501Noted that NEODyS has updated its 2009 DZ42 risk assessment - see above
1500Noted that JPL Sentry has posted 2009 DE47 as an impact risk - see above
Noted that JPL Sentry has removed 2009 DT43 as an impact risk - see above
Noted that NEODyS has removed 2009 DT43 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DZ42 risk assessment - see above
Grabbed MPEC 2009-E11 - Daily Orbit Update - see above
Grabbed MPEC 2009-E12 - 2009 DD47 - see above
Grabbed MPEC 2009-E13 - 2009 DE47 - see above
Grabbed MPEC 2009-E14 - 2009 ED - see above
0406Grabbed MPEC 2009-E10 - 2009 DD45 - see above
0121Noted that JPL Sentry has posted 2009 DL46 as an impact risk - see above