Contents  on 6 March '11

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 6 March '11

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of fifteen listings on the NEOCP 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 6 March '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-E38 - "22:54 UT" - 2011 EE17


MPEC 2011-E37 - "13:54 UT" - 2011 BE38


MPEC 2011-E36 - "11:46 UT" - 2011 EA17


MPEC 2011-E35 - "10:15 UT" - 2011 EF15


<< DOU on 6 Mar. '11 >>  MPEC 2011-E34 - "07:08 UT" - Daily Orbit Update


MPEC 2011-E33 - "06:15 UT" - 2011 EW16

Observers  on 6 March '11

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-E34 -- 175189
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2011-E34, 2011-E36, 2011-E37 & 2011-E38 -- 2011 EE17, 2011 EA17, 2011 BE38, 2011 AO52, 2003 WX87, 2003 TN1, 1999 TK12, 85990, 53435, 40267, 7474, 4401
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2011-E34 & 2011-E37 -- 2011 BE38, 2002 SZ
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 6 in MPECs 2011-E34 & 2011-E37 -- 2011 EX4, 2011 ET4, 2011 EM11, 2011 CY46, 2011 CG2, 2011 BE38
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2011-E36 & 2011-E38 -- 2011 EE17, 2011 EA17
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-E34 -- 2011 EC12
A17Guidestar Obs. in Germany, 2 in MPECs 2011-E34 & 2011-E38 -- 2011 EX4, 2011 EE17
355Hadano Obs. in Japan, 6 in MPEC 2011-E34 -- 2011 ET4, 2011 CY46, 2011 CH71, 2011 BO59, 2011 AO52, 2002 TD60
B86Hagen Obs. in Germany, 1 in MPEC 2011-E38 -- 2011 EE17
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-E34 -- 2011 CH71, 1999 TK12, 36284
240Herrenberg Obs. in Germany, 1 in MPEC 2011-E34 -- 1864
B15Inastars Obs. in Germany, 1 in MPEC 2011-E36 -- 2011 EA17
695]Mark Trueblood via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2011-E34 -- 2011 DY4
704LINEAR in New Mexico, 3 in MPEC 2011-E34 -- 2011 ET4, 2005 EY169, 2001 DQ8
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2011-E33, 2011-E34, 2011-E36, 2011-E37 & 2011-E38 -- 2011 EW16, 2011 EE17, 2011 EB, 2011 EA17, 2011 DU9, 2011 BE38
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2011-E33, 2011-E34 & 2011-E35 -- 2011 EW16, 2011 EF15, 2011 DU, 2011 BW18, 2010 PR10, 2004 EM20, 175706, 6037
A13Naef Obs. in Switzerland, 3 in MPEC 2011-E34 -- 2011 EC12, 2011 EB12, 228368
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2011-E34 -- 2011 CY46, 1999 TK12, 36284, 144332
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-E37 -- 2011 BE38
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-E37 -- 2011 BE38
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-E38 -- 2011 EE17
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-E36 -- 2011 EA17
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-E34, 2011-E36 & 2011-E37 -- 2011 EA17, 2011 BE38, 2007 EX, 2002 YZ3
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-E38 -- 2011 EE17
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2011-E34 & 2011-E37 -- 2011 BE38, 2000 CR101
291Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2011-E34, 2011-E35 & 2011-E38 -- 2011 EW4, 2011 EW16, 2011 ES4, 2011 EL11, 2011 EF15, 2011 EE17, 2011 DU, 2011 DS9, 2011 DS, 2011 CM50, 2011 BT15, 2011 AR26, 2010 XZ67, 2010 XY82, 2010 WE9, 2006 DP14, 1990 UA
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2011-E36 -- 2011 EA17
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-E37 -- 2011 BE38
C44Volta Obs., 4 in MPECs 2011-E34, 2011-E36 & 2011-E38 -- 2011 EE17, 2011 ED12, 2011 EB12, 2011 EA17
C42Xingming Obs. in China, 1 in MPEC 2011-E38 -- 2011 EE17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 March '11

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. Both also post impact solutions beyond 100 years for a few special 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
2011 EL11NEODyS17272013-20891998.64e-07-2.67-2.850NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-03-04.305 to 2011-03-06.288."
JPL Sentry17262015-21113599.4e-07-3.10-4.040JPL: "Analysis based on 17 observations spanning 1.9835 days (2011-Mar-04.30394 to 2011-Mar-06.28747)." Diameter approximately 0.376 km. from mean, weighted H=19.8.
2011 EW4JPL Sentry17262055-2106131.1e-08-7.23-7.930JPL: "Analysis based on 27 observations spanning 3.9249 days (2011-Mar-02.32289 to 2011-Mar-06.24777)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
NEODyS17262089-208913.9e-11-9.65-9.650NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2011-03-02.324 to 2011-03-06.249."
2011 ES4JPL Sentry17262031-2109472.7e-05-5.06-5.530JPL: "Analysis based on 45 observations spanning 4.0365 days (2011-Mar-02.19847 to 2011-Mar-06.23495)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
NEODyS17262031-2090552.19e-05-5.11-5.560NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2011-03-02.199 to 2011-03-06.236."
2011 EBJPL Sentry17262070-211042.8e-05-5.60-5.700JPL: "Analysis based on 32 observations spanning 3.9042 days (2011-Mar-01.38036 to 2011-Mar-05.28458)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
NEODyS17262070-207732.72e-05-5.62-5.720NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2011-03-01.381 to 2011-03-05.285."
2011 DU9JPL Sentry17262046-205942.0e-04-4.44-4.450JPL: "Analysis based on 51 observations spanning 6.3026 days (2011-Feb-27.01686 to 2011-Mar-05.31941)." Diameter approximately 0.016 km. from mean, weighted H=26.6.
NEODyS17262041-205961.94e-04-4.44-4.450NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2011-02-27.018 to 2011-03-05.320."
2011 DS9JPL Sentry17262056-210061.0e-08-5.85-6.120JPL: "Analysis based on 89 observations spanning 7.4400 days (2011-Feb-25.92799 to 2011-Mar-05.36798)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS17262056-207756.22e-09-6.00-6.060NEODyS: "Based on 89 optical observations (of which 0 are rejected as outliers) from 2011-02-25.929 to 2011-03-05.369."
2011 DSJPL Sentry17262067-2108121.5e-05-6.15-6.390JPL: "Analysis based on 64 observations spanning 9.8967 days (2011-Feb-23.39905 to 2011-Mar-05.29575)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
NEODyS17262065-2084111.24e-05-6.20-6.380NEODyS: "Based on 64 optical observations (of which 0 are rejected as outliers) from 2011-02-23.400 to 2011-03-05.297."
2011 BT15JPL Sentry17262037-2110887.6e-05-2.90-3.340JPL: "Analysis based on 69 observations spanning 40.917 days (2011-Jan-24.28933 to 2011-Mar-06.20673)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
NEODyS17262062-2090272.53e-05-3.34-3.520NEODyS: "Based on 70 optical observations (of which 3 are rejected as outliers) from 2011-01-24.290 to 2011-03-06.207."

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 6 March '11

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

2327Grabbed MPEC 2011-E38 - 2011 EE17 - see above
1727Noted that NEODyS has updated its 2011 EL11 risk assessment - see above
1726Noted that JPL Sentry has updated its 2011 BT15 risk assessment - see above
Noted that NEODyS has updated its 2011 BT15 risk assessment - see above
Noted that JPL Sentry has updated its 2011 DS risk assessment - see above
Noted that NEODyS has updated its 2011 DS risk assessment - see above
Noted that JPL Sentry has updated its 2011 DS9 risk assessment - see above
Noted that NEODyS has updated its 2011 DS9 risk assessment - see above
Noted that JPL Sentry has updated its 2011 DU9 risk assessment - see above
Noted that NEODyS has updated its 2011 DU9 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EB risk assessment - see above
Noted that NEODyS has updated its 2011 EB risk assessment - see above
Noted that JPL Sentry has updated its 2011 EL11 risk assessment - see above
Noted that JPL Sentry has updated its 2011 ES4 risk assessment - see above
Noted that NEODyS has updated its 2011 ES4 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EW4 risk assessment - see above
Noted that NEODyS has updated its 2011 EW4 risk assessment - see above
Grabbed MPEC 2011-E34 - Daily Orbit Update - see above
Grabbed MPEC 2011-E35 - 2011 EF15 - see above
Grabbed MPEC 2011-E36 - 2011 EA17 - see above
Grabbed MPEC 2011-E37 - 2011 BE38 - see above
0621Grabbed MPEC 2011-E33 - 2011 EW16 - see above