Contents  on 16 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 16 March '11

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and three updated listings. All of these 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 16 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-F02 - "18:50 UT" - Observations and Orbits of Comets


<< DOU on 16 Mar. '11 >>  MPEC 2011-F01 - "07:10 UT" - Daily Orbit Update

Observers  on 16 March '11

A total of 45 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 8 in MPEC 2011-F02 -- C/2011 C1, C/2010 X1, P/2010 WK, C/2010 S1, C/2009 UG89, C/2009 T1, 241P, 29P
B54Ager Obs. in Spain, 2 in MPEC 2011-F02 -- 240P, 123P
J24Altamira Obs. in the Canary Islands, 3 in MPEC 2011-F02 -- C/2011 A3, P/2010 WK, 103P
C07Anysllum Obs. in Spain, 3 in MPEC 2011-F02 -- 240P, 103P, 29P
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2011-F01 -- 2011 EX29, 2011 EW29, 2011 EV29, 2011 EM11, 2011 EK, 2011 CY46, 2011 BR15, 2011 BA12
565Bassano Bresciano Obs. in Italy, 2 in MPEC 2011-F02 -- 123P, 103P
215Buchloe Obs. in Germany, 2 in MPEC 2011-F02 -- C/2009 UG89, C/2006 S3
B20Carmelita Obs. in Spain, 1 in MPEC 2011-F02 -- 29P
160Castelmartini Obs. in Italy, 13 in MPECs 2011-F01 & 2011-F02 -- C/2011 A3, P/2010 WK, C/2010 G2, C/2007 VO53, 1999 TK12, 250614, 162463, 144332, 8566, 247P, 123P, 71P, 31P
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2011-F02 -- C/2011 A3, 231P, 152P, 73P
A77Chante-Perdrix Obs. in France, 1 in MPEC 2011-F02 -- 71P
J01Cielo Profundo Obs. in Spain, 4 in MPEC 2011-F02 -- C/2010 X1, 103P, 31P, 29P
958Dax Obs. in France, 16 in MPEC 2011-F02 -- C/2011 A3, P/2011 A1, C/2010 X1, P/2010 WK, C/2010 S1, C/2010 B1, C/2009 UG89, C/2005 L3, 241P, 228P, 203P, 162P, 103P, 73P, 71P, 29P
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2011-F02 -- 31P
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-F02 -- 29P
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-F02 -- 29P
D88Hiratsuka Obs. in Japan, 2 in MPEC 2011-F02 -- C/2010 FB87, 103P
H15ISON-NM Obs. in New Mexico, 4 in MPEC 2011-F02 -- C/2011 C3, C/2010 X1, C/2010 D4, 152P
A21Irmtraut Obs. in Germany, 1 in MPEC 2011-F02 -- 29P
400Kitami Obs. in Japan, 3 in MPEC 2011-F02 -- C/2011 A3, C/2010 X1, C/2010 G2
704LINEAR in New Mexico, 11 in MPECs 2011-F01 & 2011-F02 -- C/2011 A3, P/2011 A1, C/2010 X1, C/2009 UG89, 2003 FC5, 1916, 246P, 203P, 162P, 73P, 43P
J31La Axarquia Obs. in Spain, 1 in MPEC 2011-F02 -- C/2011 A3
212La Dehesilla Obs. in Spain, 2 in MPEC 2011-F02 -- 247P, 31P
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2011-F01 -- 2011 EW16
B82Maidbronn Obs. in Germany, 1 in MPEC 2011-F02 -- 241P
J40Malaga Obs. in Spain, 1 in MPEC 2011-F02 -- 29P
118Modra Obs. in Slovakia, 1 in MPEC 2011-F02 -- P/2011 A1
900Moriyama Obs. in Japan, 11 in MPEC 2011-F02 -- C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G2, C/2007 VO53, C/2005 L3, 103P, 71P, 43P, 31P, 29P
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2011-F01 & 2011-F02 -- 2011 EW16, C/2010 X1, 2010 VX39, 82P
E07Murrumbateman Obs. in New South Wales, 3 in MPEC 2011-F02 -- P/2011 A2, C/2010 X1, 43P
E81Nelson Obs., 1 in MPEC 2011-F02 -- C/2010 X1
A24New Millennium Obs. in Italy, 2 in MPEC 2011-F01 -- 2011 BO59, 6455
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPECs 2011-F01 & 2011-F02 -- 2011 EW74, 2011 CY46, C/2010 X1, 2002 TD60, 2000 EF104, 1999 TK12, 247P, 29P
5611Janos Kelemen via Piszkesteto Sta. in Hungary, 8 in MPEC 2011-F02 -- P/2011 C2, C/2011 A3, P/2011 A2, P/2011 A1, C/2010 X1, P/2010 WK, P/2010 U2, C/2010 S1
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2011-F02 -- C/2010 X1, 29P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-F02 -- 37P
473Remanzacco Obs. in Italy, 1 in MPEC 2011-F02 -- C/2010 B1
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-F01 -- 2011 EB41
510Siegen Obs. in Germany, 3 in MPEC 2011-F02 -- P/2011 C2, C/2010 X1, 103P
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2011-F01 -- 2011 DV
I28Starhoo Obs. in Massachusetts, 2 in MPEC 2011-F01 -- 4401, 1866
H10Tzec Maun Obs. Mayhill in New Mexico, 4 in MPEC 2011-F02 -- C/2010 X1, C/2010 G2, 115P, 29P
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2011-F02 -- C/2010 X1
H47Vicksburg Obs. in Mississippi, 4 in MPEC 2011-F02 -- 240P, 103P, 31P, 29P
D79YSVP Obs., 1 in MPEC 2011-F02 -- C/2010 FB87
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 EB74NEODyS17112033-20902432.75e-04-4.60-5.530NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-03-15.404 to 2011-03-15.503."
2011 DVJPL Sentry13302095-2110205.2e-06-3.59-4.070JPL: "Analysis based on 77 observations spanning 21.003 days (2011-Feb-22.51614 to 2011-Mar-15.51878)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS13302090-209019.1e-09-6.26-6.260NEODyS: "Based on 77 optical observations (of which 0 are rejected as outliers) from 2011-02-22.517 to 2011-03-15.520."

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 16 March '11

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

2008Grabbed MPEC 2011-F02 - Observations and Orbits of Comets - see above
1710Noted that NEODyS has posted 2011 EB74 as an impact risk - see above
1330Noted that JPL Sentry has updated its 2011 DV risk assessment - see above
Noted that NEODyS has updated its 2011 DV risk assessment - see above
Grabbed MPEC 2011-F01 - Daily Orbit Update - see above