Contents  on 10 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 10 March '11

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of nineteen 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 10 March '11

Minor Planet Electronic Circulars

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


MPEC 2011-E57 - "17:28 UT" - Observations and Orbits of Comets


MPEC 2011-E56 - "17:15 UT" - 2011 EM40


MPEC 2011-E55 - "17:11 UT" - 2011 EL40


MPEC 2011-E54 - "17:05 UT" - 2011 EK40


<< DOU on 10 Mar. '11 >>  MPEC 2011-E53 - "07:10 UT" - Daily Orbit Update


MPEC 2011-E52 - "00:39 UT" - 2011 EX29


MPEC 2011-E51 - "00:33 UT" - 2011 EW29


MPEC 2011-E50 - "00:28 UT" - 2011 EV29


MPEC 2011-E49 - "00:23 UT" - 2011 EU29


MPEC 2011-E48 - "00:18 UT" - 2011 ET29

Observers  on 10 March '11

A total of 70 observers appear in today's MPECs.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 9 in MPEC 2011-E57 -- C/2009 K5, 247P, 240P, 231P, 123P, 103P, 71P, 31P, 29P
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-E53 -- 2011 EG17
300Bisei Spaceguard Center in Japan, 7 in MPECs 2011-E49, 2011-E50, 2011-E51, 2011-E52 & 2011-E53 -- 2011 EX29, 2011 EW29, 2011 EV29, 2011 EU29, 85953, 8507, 8176
B59Borken Obs. in Germany, 1 in MPEC 2011-E57 -- 29P
B96Brixiis Obs. in Belgium, 12 in MPEC 2011-E57 -- C/2011 A3, C/2010 X1, P/2010 WK, C/2010 S1, C/2010 G2, C/2009 K5, C/2007 Q3, 247P, 240P, 123P, 103P, 29P
215Buchloe Obs. in Germany, 22 in MPEC 2011-E57 -- C/2011 C3, P/2011 C2, C/2011 C1, P/2011 A1, C/2010 S1, C/2010 KW7, C/2010 B1, C/2009 F2, C/2005 L3, 246P, 241P, 231P, 203P, 152P, 117P, 105P, 103P, 74P, 73P, 71P, 31P, 29P
160Castelmartini Obs. in Italy, 12 in MPECs 2011-E49, 2011-E51, 2011-E53 & 2011-E57 -- 2011 EW29, 2011 EU29, P/2010 WK, C/2010 B1, C/2009 K5, 85990, 40267, 23183, 22771, 215167, 4954, 123P
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2011-E50, 2011-E53, 2011-E55, 2011-E56 & 2011-E57 -- 2011 EV29, 2011 EM40, 2011 EL40, C/2011 A3, C/2010 X1, 2004 FG1, 2001 CA32, 265196, 264308, 249595, 169675, 162421, 144332, 136874, 1916, 248P, 246P, 162P, 73P, 71P, 31P
G58Chabot Obs. in northern California, 3 in MPEC 2011-E53 -- 2011 EX4, 2011 EU29, 2011 ET29
A77Chante-Perdrix Obs. in France, 3 in MPEC 2011-E57 -- P/2011 C2, 247P, 73P
J01Cielo Profundo Obs. in Spain, 4 in MPEC 2011-E57 -- C/2010 X1, C/2005 L3, 103P, 29P
850Cordell-Lorenz Obs. in Tennessee, 3 in MPEC 2011-E57 -- C/2011 A3, C/2010 X1, C/2010 G2
B50Corner Obs. in Germany, 2 in MPEC 2011-E57 -- 123P, 103P
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2011-E53 -- 263976, 13651
958Dax Obs. in France, 23 in MPEC 2011-E57 -- C/2011 A3, P/2011 A1, C/2010 X1, P/2010 WK, C/2010 S1, C/2010 B1, C/2009 K5, C/2009 F2, C/2007 Q3, C/2005 L3, 247P, 241P, 240P, 228P, 223P, 203P, 162P, 123P, 103P, 73P, 71P, 43P, 29P
B60Deep Sky Obs. in Germany, 4 in MPEC 2011-E53 -- 2011 BO59, 68350, 164400, 1864
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2011-E57 -- 43P
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2011-E48, 2011-E49 & 2011-E50 -- 2011 EV29, 2011 EU29, 2011 ET29
372Geisei Obs. in Japan, 3 in MPEC 2011-E57 -- C/2011 C1, 103P, 29P
B83Gieres Obs. in France, 3 in MPEC 2011-E57 -- C/2010 X1, 103P, 29P
J95Great Shefford Obs. in England, 4 in MPECs 2011-E48, 2011-E49, 2011-E50 & 2011-E53 -- 2011 EV29, 2011 EU29, 2011 EU20, 2011 ET29
E16Grove Creek Obs. in New South Wales, 2 in MPEC 2011-E57 -- C/2010 FB87, 103P
240Herrenberg Obs. in Germany, 1 in MPEC 2011-E57 -- 103P
D88Hiratsuka Obs. in Japan, 4 in MPEC 2011-E57 -- C/2010 FB87, C/2010 B1, 240P, 123P
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-E57 -- C/2010 X1, 231P, 31P
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2011-E57 -- 103P
585Kiev Comet Station in the Ukraine, 7 in MPEC 2011-E57 -- C/2011 C1, C/2010 G2, C/2009 Y1, 240P, 123P, 103P, 31P
D95Kurihara Obs. in Japan, 6 in MPEC 2011-E57 -- C/2010 X1, C/2010 B1, C/2005 L3, 240P, 103P, 29P
704LINEAR in New Mexico, 17 in MPECs 2011-E49, 2011-E53 & 2011-E57 -- 2011 EX4, 2011 EU29, 2011 EB12, 2011 DS9, 2011 BO59, C/2011 A3, C/2010 X1, C/2009 UG89, 2001 DQ8, 68350, 215167, 163081, 144332, 143381, 231P, 71P, 31P
J38La Vara Obs. in Spain, 9 in MPEC 2011-E57 -- C/2010 X1, C/2010 S1, C/2010 G2, C/2010 B1, 247P, 240P, 123P, 103P, 29P
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2011-E53, 2011-E54, 2011-E55 & 2011-E56 -- 2011 EM40, 2011 EL40, 2011 EK40, 2011 BM45
B82Maidbronn Obs. in Germany, 16 in MPEC 2011-E57 -- P/2011 C2, C/2010 X1, P/2010 WK, C/2010 S1, C/2009 U5, C/2009 K5, C/2005 L3, 247P, 240P, 228P, 123P, 103P, 73P, 71P, 29P, 10P
C10Maisoncelles Obs. in France, 17 in MPEC 2011-E57 -- C/2011 A3, P/2011 A2, C/2010 X1, C/2010 G2, C/2010 B1, C/2009 UG89, C/2009 F2, C/2008 FK75, C/2007 VO53, C/2007 Q3, C/2005 L3, 231P, 103P, 73P, 71P, 31P, 29P
A01Masia Cal Maciarol Modul 1 in Spain, 1 in MPEC 2011-E57 -- C/2010 G2
232Masquefa Obs. in Spain, 3 in MPEC 2011-E57 -- C/2010 B1, 123P, 29P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-E53 -- 2011 BM45
118Modra Obs. in Slovakia, 1 in MPEC 2011-E49 -- 2011 EU29
152Moletai Obs. in Lithuania, 2 in MPEC 2011-E57 -- 103P, 29P
945Monte Deva Obs. in Spain, 5 in MPEC 2011-E57 -- C/2010 X1, C/2010 B1, 123P, 103P, 29P
900Moriyama Obs. in Japan, 4 in MPEC 2011-E57 -- P/2011 A1, C/2010 S1, 103P, 71P
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2011-E51, 2011-E52, 2011-E53, 2011-E54 & 2011-E57 -- 2011 EX29, 2011 EW29, 2011 EU20, 2011 EM11, 2011 EK40, 99935, 53550, 231P, 227P, 203P, 31P
J93Mt. Tuffley Obs. in England, 1 in MPEC 2011-E57 -- 103P
E07Murrumbateman Obs. in New South Wales, 5 in MPEC 2011-E57 -- C/2010 FB87, C/2010 B1, C/2009 T1, 103P, 43P
D81Nagano Obs. in Japan, 1 in MPEC 2011-E57 -- C/2010 G2
J47Nazaret Obs. in Spain, 3 in MPEC 2011-E57 -- C/2010 X1, 103P, 29P
A24New Millennium Obs. in Italy, 1 in MPEC 2011-E49 -- 2011 EU29
C23Olmen Obs. in Belgium, 8 in MPEC 2011-E57 -- C/2010 X1, C/2010 S1, C/2010 G2, 247P, 240P, 123P, 103P, 29P
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2011-E57 -- C/2010 G2
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-E51 -- 2011 EW29
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPEC 2011-E57 -- C/2011 C3, C/2011 C1
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPEC 2011-E57 -- P/2011 A2, C/2010 FB87, 115P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 2 in MPEC 2011-E57 -- C/2009 F4, C/2006 W3
473Remanzacco Obs. in Italy, 1 in MPEC 2011-E57 -- C/2010 B1
C09Rouet Obs. in France, 6 in MPEC 2011-E57 -- C/2011 A3, C/2009 UG89, C/2008 FK75, 73P, 31P, 29P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-E48 -- 2011 ET29
619Sabadell Obs. in Spain, 1 in MPEC 2011-E57 -- 123P
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2011-E49, 2011-E50 & 2011-E55 -- 2011 EV29, 2011 EU29, 2011 EL40
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-E57 -- C/2007 VO53
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-E57 -- 103P
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2011-E53 & 2011-E57 -- C/2010 X1, 159635, 5646
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2011-E52 & 2011-E53 -- 2011 EX29, 2011 EW4, 2011 EG17, 2011 EC7, 2011 DV, 2011 DS9, 2011 CG22, 2011 BR15, 2011 BJ24, 2010 XY82, 2001 AD2
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2011-E48 & 2011-E49 -- 2011 EU29, 2011 ET29
A71Stixendorf Obs. in Austria, 3 in MPEC 2011-E57 -- C/2010 X1, 247P, 123P
6734Mike Hicks via Table Mtn. Obs. in southern California, 1 in MPEC 2011-E49 -- 2011 EU29
H10Tzec Maun Obs. Mayhill in New Mexico, 17 in MPECs 2011-E53 & 2011-E57 -- 2011 DV, P/2011 C2, P/2011 A2, C/2010 X1, C/2010 L3, C/2010 G3, C/2010 G2, C/2007 VO53, 247P, 241P, 231P, 203P, 152P, 73P, 71P, 29P, 10P
D96Tzec Maun Obs. Moorook in South Australia, 3 in MPEC 2011-E57 -- C/2010 FB87, C/2009 F4, 9P
H47Vicksburg Obs. in Mississippi, 8 in MPEC 2011-E57 -- C/2011 A3, C/2010 X1, C/2010 G2, 123P, 103P, 71P, 43P, 29P
B42Vitebsk Obs. in Belarus, 3 in MPECs 2011-E51 & 2011-E57 -- 2011 EW29, C/2011 A3, C/2010 X1
C44Volta Obs. in Italy, 1 in MPEC 2011-E49 -- 2011 EU29
940Waterlooville Obs. in England, 1 in MPEC 2011-E57 -- 123P
C42Xingming Obs. in China, 2 in MPEC 2011-E57 -- C/2011 A3, C/2010 X1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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 EM40JPL Sentry20352018-21102286.5e-06-6.54-7.350JPL: "Analysis based on 9 observations spanning .07818 days (2011-Mar-10.37855 to 2011-Mar-10.45673)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2011 EL40JPL Sentry19182054-2103232.6e-07-7.19-7.540JPL: "Analysis based on 24 observations spanning .20997 days (2011-Mar-10.24148 to 2011-Mar-10.45145)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2011 EK40JPL Sentry22302013-21116565.1e-07-7.12-8.260JPL: "Analysis based on 8 observations spanning .17744 days (2011-Mar-10.21421 to 2011-Mar-10.39165)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
2011 EU29JPL Sentry17062013-2110826.0e-07-3.24-3.890JPL #2 for the day: "Analysis based on 46 observations spanning 1.9761 days (2011-Mar-08.20041 to 2011-Mar-10.17652)." Diameter approximately 0.372 km. from mean, weighted H=19.8.
NEODyS17062013-2089934.59e-07-3.29-3.90NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-10.177."
2011 EC7JPL Sentry1706R E M O V E DJPL: Risk listing removed at 1253 UTC.
2011 EW4JPL Sentry1706R E M O V E DJPL: Risk listing removed at 1329 UTC.
NEODyS1706R E M O V E D-
2011 DVJPL Sentry17062075-2110396.5e-06-3.45-4.230JPL: "Analysis based on 62 observations spanning 14.990 days (2011-Feb-22.51614 to 2011-Mar-09.50649)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS17062088-209039.9e-08-5.19-5.40NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2011-02-22.517 to 2011-03-09.507."
2011 BM45JPL Sentry1706R E M O V E DJPL: Risk listing removed at 1247 UTC.
NEODyS1706R 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 10 March '11

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

2230Noted that JPL Sentry has posted 2011 EK40 as an impact risk - see above
2035Noted that JPL Sentry has posted 2011 EM40 as an impact risk - see above
1918Noted that JPL Sentry has posted 2011 EL40 as an impact risk - see above
1807Grabbed MPEC 2011-E54 - 2011 EK40 - see above
Grabbed MPEC 2011-E55 - 2011 EL40 - see above
Grabbed MPEC 2011-E56 - 2011 EM40 - see above
Grabbed MPEC 2011-E57 - Observations and Orbits of Comets - see above
1706Noted that JPL Sentry has removed 2011 BM45 as an impact risk - see above
Noted that NEODyS has removed 2011 BM45 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 DV risk assessment - see above
Noted that NEODyS has updated its 2011 DV risk assessment - see above
Noted that JPL Sentry has removed 2011 EC7 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 EU29 risk assessment - see above
Noted that NEODyS has posted 2011 EU29 as an impact risk - see above
Noted that JPL Sentry has removed 2011 EW4 as an impact risk - see above
Noted that NEODyS has removed 2011 EW4 as an impact risk - see above
Grabbed MPEC 2011-E53 - Daily Orbit Update - see above
0319Noted that the NEOCP has become active
0231Noted that the NEOCP has become empty
0211Noted that JPL Sentry has posted 2011 EU29 as an impact risk - see above
0124Grabbed MPEC 2011-E48 - 2011 ET29 - see above
Grabbed MPEC 2011-E49 - 2011 EU29 - see above
Grabbed MPEC 2011-E50 - 2011 EV29 - see above
Grabbed MPEC 2011-E51 - 2011 EW29 - see above
Grabbed MPEC 2011-E52 - 2011 EX29 - see above