Contents  on 25 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 25 March '11

The MPC's NEO Confirmation Page has 13 listings: 5 new, 8 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new and eight updated listings. Of these, nine were "one nighters."

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 25 March '11

Minor Planet Electronic Circulars

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


MPEC 2011-F23 - "16:17 UT" - Observations and Orbits of Comets


<< DOU on 25 Mar. '11 >>  MPEC 2011-F22 - "07:08 UT" - Daily Orbit Update

Observers  on 25 March '11

A total of 61 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 7 in MPEC 2011-F23 -- C/2011 C1, C/2011 A3, C/2010 G2, C/2010 FB87, C/2010 B1, C/2006 S3, 103P
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2011-F22 -- 23187, 11885
C60Argelander Institute for Astronomy Obs. in Germany, 1 in MPEC 2011-F23 -- C/2011 F1
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2011-F23 -- C/2010 FB87
B59Borken Obs. in Germany, 1 in MPEC 2011-F23 -- C/2010 G2
B96Brixiis Obs. in Belgium, 7 in MPEC 2011-F23 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, 123P, 71P, 29P
215Buchloe Obs. in Germany, 10 in MPEC 2011-F23 -- C/2011 F1, C/2010 X1, P/2010 WK, C/2009 U5, C/2009 K5, C/2007 D1, 248P, 162P, 123P, 29P
160Castelmartini Obs. in Italy, 15 in MPECs 2011-F22 & 2011-F23 -- C/2011 F1, 2011 EW29, 2011 CH71, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 UG89, 68350, 22771, 163250, 137170, 11885, 8566, 3554, 123P
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2011-F22 -- 2011 DU, 85953
A77Chante-Perdrix Obs. in France, 7 in MPEC 2011-F23 -- C/2011 F1, C/2011 C1, 240P, 231P, 73P, 71P, 29P
J18Churchstoke Obs. in Wales, 3 in MPECs 2011-F22 & 2011-F23 -- 2011 EW74, 2011 EN40, 29P
J01Cielo Profundo Obs. in Spain, 4 in MPEC 2011-F23 -- C/2011 F1, C/2011 A3, C/2010 X1, 29P
958Dax Obs. in France, 18 in MPEC 2011-F23 -- C/2011 F1, C/2011 C1, C/2011 A3, P/2011 A1, C/2010 X1, P/2010 WK, C/2010 B1, C/2009 UG89, C/2009 F2, C/2007 Q3, C/2005 L3, 247P, 240P, 162P, 103P, 73P, 43P, 29P
448Desert Moon Obs. in New Mexico, 3 in MPEC 2011-F22 -- 2011 EW29, 2011 CG71, 2004 XN50
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2011-F23 -- C/2010 X1
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-F23 -- 29P
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-F22 -- 2010 QE2
372Geisei Obs. in Japan, 1 in MPEC 2011-F23 -- C/2011 C1
E94Gisborne Obs. in New Zealand, 1 in MPEC 2011-F23 -- C/2009 F4
J95Great Shefford Obs. in England, 2 in MPEC 2011-F22 -- 2011 EW74, 2011 ES74
C46Horizon Obs., 3 in MPEC 2011-F23 -- C/2005 L3, 123P, 103P
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2011-F22 & 2011-F23 -- 2011 EW74, C/2010 X1
A21Irmtraut Obs. in Germany, 5 in MPEC 2011-F23 -- C/2011 F1, C/2005 L3, 247P, 123P, 103P
585Kiev Comet Station in the Ukraine, 6 in MPEC 2011-F23 -- C/2011 C1, 240P, 123P, 103P, 31P, 29P
704LINEAR in New Mexico, 12 in MPECs 2011-F22 & 2011-F23 -- C/2010 X1, P/2010 WK, C/2007 Q3, C/2005 L3, 96590, 267759, 188174, 184990, 1864, 247P, 240P, 123P
J87La Canada Obs. in Spain, 1 in MPEC 2011-F23 -- 103P
212La Dehesilla Obs. in Spain, 3 in MPEC 2011-F23 -- C/2010 G2, 240P, 123P
J38La Vara Obs. in Spain, 4 in MPEC 2011-F23 -- C/2011 F1, C/2010 S1, 71P, 29P
B82Maidbronn Obs. in Germany, 10 in MPEC 2011-F23 -- C/2011 F1, C/2010 X1, P/2010 WK, C/2010 S1, 247P, 240P, 228P, 123P, 103P, 29P
C10Maisoncelles Obs. in France, 5 in MPEC 2011-F23 -- C/2011 A3, C/2010 X1, C/2010 G2, 73P, 29P
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-F22 -- 2001 QP181
118Modra Obs. in Slovakia, 1 in MPEC 2011-F23 -- C/2011 F1
213Montcabre Obs. in Spain, 10 in MPEC 2011-F23 -- C/2011 F1, C/2011 C1, C/2011 A3, C/2010 X1, P/2010 WK, 240P, 123P, 103P, 71P, 29P
945Monte Deva Obs. in Spain, 4 in MPEC 2011-F23 -- C/2010 X1, 123P, 103P, 29P
900Moriyama Obs. in Japan, 5 in MPEC 2011-F23 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2005 L3, 29P
E07Murrumbateman Obs. in New South Wales, 3 in MPEC 2011-F23 -- C/2010 FB87, 103P, 37P
J47Nazaret Obs. in Spain, 3 in MPEC 2011-F23 -- C/2010 X1, 103P, 29P
C47Nonndorf Obs., 1 in MPEC 2011-F23 -- C/2011 F1
C23Olmen Obs. in Belgium, 3 in MPEC 2011-F23 -- C/2010 X1, C/2010 G2, 29P
B49Paus Obs. in Spain, 1 in MPEC 2011-F23 -- C/2005 L3
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2011-F22 -- 2011 AN16, 2002 TD60, 4954
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2011-F23 -- C/2011 A3, C/2010 X1, P/2010 WK, 240P, 123P, 103P, 29P
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 5 in MPEC 2011-F23 -- C/2011 C1, C/2010 J2, C/2010 FB87, C/2010 B1, C/2006 S3
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-F22 -- 2011 CG2
473Remanzacco Obs. in Italy, 1 in MPEC 2011-F23 -- 103P
C09Rouet Obs. in France, 3 in MPEC 2011-F23 -- C/2011 F1, C/2010 X1, 29P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-F22 -- 2005 GW119
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-F23 -- C/2011 F1
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-F22 -- 2003 FF5
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-F22 -- 2011 DL19
510Siegen Obs. in Germany, 2 in MPEC 2011-F23 -- C/2011 F1, 123P
291Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2011-F22 -- 2011 ET74, 2011 EO51, 2011 EO40, 2011 EM51, 2011 EG17, 2011 EF15, 2011 ED12, 2011 EC41, 2011 DV, 2011 AH37, 2010 LN14
A78Stia Obs. in Italy, 1 in MPEC 2011-F22 -- 2011 DS9
A71Stixendorf Obs. in Austria, 5 in MPEC 2011-F23 -- C/2010 X1, 231P, 123P, 73P, 29P
H10Tzec Maun Obs. Mayhill in New Mexico, 6 in MPEC 2011-F23 -- C/2011 C1, C/2010 X1, C/2010 S1, C/2009 UG89, C/2009 K5, 73P
D96Tzec Maun Obs. Moorook in South Australia, 3 in MPEC 2011-F23 -- C/2010 FB87, C/2009 F4, 9P
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2011-F22 -- 17274
H47Vicksburg Obs. in Mississippi, 11 in MPEC 2011-F23 -- C/2010 X1, C/2010 G2, C/2009 UG89, 247P, 203P, 103P, 73P, 71P, 43P, 31P, 29P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2011-F23 -- 203P, 71P, 31P
940Waterlooville Obs. in England, 1 in MPEC 2011-F23 -- 123P
C42Xingming Obs. in China, 4 in MPEC 2011-F23 -- C/2011 F1, C/2010 X1, C/2005 L3, 29P
367Yatsuka Obs. in Japan, 2 in MPEC 2011-F23 -- C/2011 C1, C/2010 G2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 ET74JPL Sentry1534R E M O V E DJPL: Risk listing removed at 1058 UTC.
2011 DVJPL Sentry15342108-211053.0e-07-4.83-5.010JPL: "Analysis based on 84 observations spanning 29.979 days (2011-Feb-22.51614 to 2011-Mar-24.49498)." Diameter approximately 0.270 km. from mean, weighted H=20.5.

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 25 March '11

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

1801Grabbed MPEC 2011-F23 - Observations and Orbits of Comets - see above
1534Noted that JPL Sentry has updated its 2011 DV risk assessment - see above
Noted that JPL Sentry has removed 2011 ET74 as an impact risk - see above
Grabbed MPEC 2011-F22 - Daily Orbit Update - see above