Contents  on 3 March '09

Resources:

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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 3 March '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." The Tracking News counted a total of 25 listings on the NEOCP at some point on this day.

New MPECs  on 3 March '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there were 23 MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-E37 - "23:54 UT" - 2009 EM1


MPEC 2009-E36 - "23:51 UT" - 2009 EK1


MPEC 2009-E35 - "17:25 UT" - 2009 EJ1


MPEC 2009-E34 - "17:22 UT" - 2009 EH1


MPEC 2009-E33 - "15:12 UT" - 2009 EG1


MPEC 2009-E32 - "15:09 UT" - 2009 EF1


MPEC 2009-E31 - "15:06 UT" - 2009 EE1


MPEC 2009-E30 - "15:03 UT" - 2009 ED1


MPEC 2009-E29 - "14:56 UT" - 2009 EC1


MPEC 2009-E28 - "14:53 UT" - 2009 EB1


MPEC 2009-E27 - "14:50 UT" - 2009 EA1


MPEC 2009-E26 - "14:45 UT" - 2009 EZ


MPEC 2009-E25 - "14:42 UT" - 2009 EY


MPEC 2009-E24 - "14:39 UT" - 2009 EX


MPEC 2009-E23 - "14:36 UT" - 2009 EW


MPEC 2009-E22 - "14:33 UT" - 2009 EV


MPEC 2009-E21 - "14:30 UT" - 2009 EU


MPEC 2009-E20 - "14:27 UT" - 2009 ET


MPEC 2009-E19 - "14:24 UT" - 2009 ES


MPEC 2009-E18 - "14:21 UT" - 2009 ER


MPEC 2009-E17 - "14:18 UT" - 2009 EQ


MPEC 2009-E16 - "14:15 UT" - 2009 EP


<< DOU on 3 Mar. '09 >>  MPEC 2009-E15 - "07:08 UT" - Daily Orbit Update

Observers  on 3 March '09

Nineteen observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPECs 2009-E15, 2009-E35, 2009-E36 & 2009-E37 -- 2009 EM1, 2009 EK1, 2009 EJ1, 2009 EA, 2009 DW, 2009 DV42, 2009 DL46, 2009 DL1, 2009 DE47, 2009 CV5, 2009 CB3, 2009 CA2
703Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2009-E15, 2009-E16, 2009-E18, 2009-E23, 2009-E29, 2009-E32 & 2009-E37 -- 2009 EW, 2009 ER, 2009 EP, 2009 EM1, 2009 EF1, 2009 EC1, 2009 DO45, 2009 DN45, 2009 BP58, 2009 BB11, 2008 UC95, 2006 SX217, 2005 EM30, 2003 WP25, 2002 CT11, 2000 KN44, 25916, 198856, 153953, 152889, 7822, 3103
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-E16 -- 2009 EP
J95Great Shefford Obs. in England, 4 in MPECs 2009-E15, 2009-E16, 2009-E18 & 2009-E23 -- 2009 EW, 2009 ER, 2009 EP, 2009 DD45
A17Guidestar Obs. in Germany, 1 in MPEC 2009-E15 -- 2009 DE47
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2009-E15 -- 2009 DR3, 4179
857Iowa Robotic Obs. in Arizona, 2 in MPEC 2009-E15 -- 2009 DV42, 2009 DL1
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2009-E15 -- 2009 DD45
704LINEAR in New Mexico, 17 in MPECs 2009-E15, 2009-E26 & 2009-E30 -- 2009 EZ, 2009 ED1, 2009 DR3, 2009 DL1, 2009 DD1, 2009 CW1, 2009 CO5, 2006 BC10, 2004 EU9, 2002 EB3, 22771, 206910, 141495, 138883, 8566, 4596, 4179
H01Magdalena Ridge Obs. (MRO) in New Mexico, 14 in MPECs 2009-E16, 2009-E17, 2009-E18, 2009-E19, 2009-E20, 2009-E21, 2009-E22, 2009-E23, 2009-E25, 2009-E26, 2009-E29, 2009-E32, 2009-E33 & 2009-E37 -- 2009 EZ, 2009 EY, 2009 EW, 2009 EV, 2009 EU, 2009 ET, 2009 ES, 2009 ER, 2009 EQ, 2009 EP, 2009 EM1, 2009 EG1, 2009 EF1, 2009 EC1
474Mt. John Obs. in New Zealand, 12 in MPECs 2009-E15, 2009-E31, 2009-E34 & 2009-E35 -- 2009 EJ1, 2009 EH1, 2009 EE1, 2009 EA, 2009 DZ42, 2009 DT43, 2009 DS36, 2009 DL1, 2009 DD45, 2009 DA43, 2009 CT, 2009 AD16
G96Mt. Lemmon Survey (MLS) in Arizona, 25 in MPECs 2009-E15, 2009-E16, 2009-E17, 2009-E18, 2009-E19, 2009-E20, 2009-E21, 2009-E22, 2009-E24, 2009-E25, 2009-E27, 2009-E28, 2009-E29, 2009-E30, 2009-E31, 2009-E33, 2009-E34 & 2009-E36 -- 2009 EY, 2009 EX, 2009 EV, 2009 EU, 2009 ET, 2009 ES, 2009 ER, 2009 EQ, 2009 EP, 2009 EK1, 2009 EH1, 2009 EG1, 2009 EE1, 2009 ED1, 2009 EC1, 2009 EB1, 2009 EA1, 2009 DV43, 2009 DB45, 2009 BA71, 2008 RS26, 2008 LW8, 203015, 138883, 4596
854Sabino Canyon Obs. in Arizona, 8 in MPECs 2009-E16, 2009-E18, 2009-E23, 2009-E29, 2009-E30, 2009-E32, 2009-E33 & 2009-E37 -- 2009 EW, 2009 ER, 2009 EP, 2009 EM1, 2009 EG1, 2009 EF1, 2009 ED1, 2009 EC1
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-E15 -- 2009 DM45, 2009 DH39, 2009 DD45
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2009-E15 & 2009-E35 -- 2009 EJ1, 2009 BD2, 2006 SD6, 2004 EU9, 1996 BZ3, 8566, 7753
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-E15, 2009-E17, 2009-E21, 2009-E22, 2009-E24, 2009-E28, 2009-E35 & 2009-E36 -- 2009 EX, 2009 EV, 2009 EU, 2009 EQ, 2009 EK1, 2009 EJ1, 2009 EB1, 2009 DL46, 2009 DK46, 2009 DC43, 2009 CT1, 2009 CR4, 2009 CB3, 2009 BM58, 7753
611Starkenburg Obs. in Germany, 1 in MPEC 2009-E37 -- 2009 EM1
H53Thompsonville Obs. in Illinois, 6 in MPEC 2009-E15 -- 2009 DR3, 2009 DQ4, 2009 BD77, 2006 WZ2, 2006 BC10, 2004 EU9
B89Tiana Obs., 1 in MPEC 2009-E15 -- 4179
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 March '09

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
2009 EJ1JPL Sentry19012036-208695.9e-09-9.78-9.980JPL: "Analysis based on 21 observations spanning .32485 days (2009-Mar-03.27933 to 2009-Mar-03.60418)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
2009 EH1JPL Sentry19302048-207672.2e-08-8.94-9.080JPL: "Analysis based on 18 observations spanning .32144 days (2009-Mar-03.25773 to 2009-Mar-03.57917)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
2009 EE1JPL Sentry1700207211.4e-10-10.20-10.20JPL: "Analysis based on 19 observations spanning .29351 days (2009-Mar-03.25773 to 2009-Mar-03.55124)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
2009 EWJPL Sentry17002063-2081171.7e-05-5.47-5.640JPL: "Analysis based on 22 observations spanning 1.0561 days (2009-Mar-02.29194 to 2009-Mar-03.348)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
2009 EVJPL Sentry16302011-2090741.8e-08-4.28-4.730JPL: "Analysis based on 13 observations spanning .88685 days (2009-Mar-02.26506 to 2009-Mar-03.15191)." Diameter approximately 0.359 km. from mean, weighted H=19.9.
2009 ESJPL Sentry16302026-2098202.9e-08-4.92-5.220JPL: "Analysis based on 14 observations spanning 1.0041 days (2009-Mar-02.21182 to 2009-Mar-03.21594)." Diameter approximately 0.320 km. from mean, weighted H=20.1.
2009 DE47JPL Sentry1600R E M O V E DJPL: Risk listing removed at 1031 UTC.
2009 DL46JPL Sentry1600207211.0e-10-8.60-8.600JPL: "Analysis based on 28 observations spanning 2.0028 days (2009-Feb-28.41984 to 2009-Mar-02.422627)." Diameter approximately 0.170 km. from mean, weighted H=21.5.
2009 DC43NEODyS1600207014.94e-11-6.76-6.760NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2009/02/26.500 to 2009/03/02.389."
JPL Sentry1600R E M O V E DJPL: Risk listing removed at 0951 UTC.
2009 DZ42JPL Sentry1600207315.7e-09-5.77-5.770JPL: "Analysis based on 49 observations spanning 4.3018 days (2009-Feb-26.12849 to 2009-Mar-02.43025)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS1600207311.26e-09-6.45-6.450NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/03/02.431."

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 3 March '09

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

2359Grabbed MPEC 2009-E36 - 2009 EK1 - see above
Grabbed MPEC 2009-E37 - 2009 EM1 - see above
1930Noted that JPL Sentry has posted 2009 EH1 as an impact risk - see above
1901Noted that JPL Sentry has posted 2009 EJ1 as an impact risk - see above
1732Grabbed MPEC 2009-E34 - 2009 EH1 - see above
Grabbed MPEC 2009-E35 - 2009 EJ1 - see above
1700Noted that JPL Sentry has posted 2009 EE1 as an impact risk - see above
Noted that JPL Sentry has posted 2009 EW as an impact risk - see above
1630Noted that JPL Sentry has posted 2009 ES as an impact risk - see above
Noted that JPL Sentry has posted 2009 EV as an impact risk - see above
1600Noted that JPL Sentry has removed 2009 DC43 as an impact risk - see above
Noted that NEODyS has updated its 2009 DC43 risk assessment - see above
Noted that JPL Sentry has removed 2009 DE47 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 DL46 risk assessment - 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
Grabbed MPEC 2009-E15 - Daily Orbit Update - see above
Grabbed MPEC 2009-E16 - 2009 EP - see above
Grabbed MPEC 2009-E17 - 2009 EQ - see above
Grabbed MPEC 2009-E18 - 2009 ER - see above
Grabbed MPEC 2009-E19 - 2009 ES - see above
Grabbed MPEC 2009-E20 - 2009 ET - see above
Grabbed MPEC 2009-E21 - 2009 EU - see above
Grabbed MPEC 2009-E22 - 2009 EV - see above
Grabbed MPEC 2009-E23 - 2009 EW - see above
Grabbed MPEC 2009-E24 - 2009 EX - see above
Grabbed MPEC 2009-E25 - 2009 EY - see above
Grabbed MPEC 2009-E26 - 2009 EZ - see above
Grabbed MPEC 2009-E27 - 2009 EA1 - see above
Grabbed MPEC 2009-E28 - 2009 EB1 - see above
Grabbed MPEC 2009-E29 - 2009 EC1 - see above
Grabbed MPEC 2009-E30 - 2009 ED1 - see above
Grabbed MPEC 2009-E31 - 2009 EE1 - see above
Grabbed MPEC 2009-E32 - 2009 EF1 - see above
Grabbed MPEC 2009-E33 - 2009 EG1 - see above