Contents  on 16 February '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 February '11

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were three listings noted earlier today.

New MPECs  on 16 February '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-D06 - "16:27 UT" - Observations and Orbits of Comets


MPEC 2011-D05 - "12:40 UT" - 2011 BU59


<< DOU on 16 Feb. '11 >>  MPEC 2011-D04 - "07:12 UT" - Daily Orbit Update


MPEC 2011-D03 - "01:52 UT" - 2011 CY71


MPEC 2011-D02 - "01:44 UT" - 2011 BT59


MPEC 2011-D01 - "01:13 UT" - Comet C/2011 C3 (Gibbs)

Observers  on 16 February '11

A total of 86 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 8 in MPEC 2011-D06 -- C/2011 C1, P/2011 A2, P/2010 V1, P/2010 U2, C/2010 KW7, C/2009 Y1, 162P, 117P
B54Ager Obs. in Spain, 4 in MPEC 2011-D06 -- C/2010 X1, C/2010 G2, 240P, 123P
J97Alginet Obs. in Spain, 1 in MPEC 2011-D06 -- 123P
J24Altamira Obs. in the Canary Islands, 4 in MPEC 2011-D06 -- C/2010 X1, 71P, 31P, 29P
C07Anysllum Obs. in Spain, 2 in MPEC 2011-D06 -- C/2010 S1, 29P
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2011-D01 & 2011-D04 -- 2011 CY46, 2011 CM50, 2011 CL50, 2011 CJ50, 2011 CG50, 2011 CG2, 2011 CB50, C/2011 C3, 2011 BA12, 2011 AO52, 2010 UX7, 2008 EE, 2004 BW58, 2002 TD60
918Badlands Obs. in South Dakota, 2 in MPEC 2011-D06 -- 31P, 29P
B75Betelgeuse Station in Italy, 5 in MPEC 2011-D06 -- P/2010 WK, C/2010 S1, 247P, 240P, 123P
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-D06 -- C/2011 C1
I99Blanquita Obs. in Spain, 4 in MPEC 2011-D06 -- P/2010 WK, 240P, 123P, 29P
B96Brixiis Obs. in Belgium, 7 in MPEC 2011-D06 -- P/2010 WK, C/2010 S1, C/2009 K5, 240P, 123P, 103P, 29P
215Buchloe Obs. in Germany, 20 in MPEC 2011-D06 -- C/2011 A3, P/2011 A2, C/2010 X1, C/2010 U3, P/2010 U2, C/2010 G2, C/2010 B1, C/2009 Y1, C/2009 T1, C/2008 S3, C/2007 VO53, C/2007 Q3, C/2007 G1, 244P, 241P, 236P, 228P, 223P, 103P, 43P
J96Cantabria Obs. in Spain, 3 in MPEC 2011-D06 -- C/2010 B1, 247P, 103P
B66Casasco Obs. in Italy, 3 in MPEC 2011-D06 -- C/2010 X1, 73P, 29P
703Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2011-D06 -- P/2011 A2, P/2010 U2, P/2010 D2, C/2010 B1, C/2009 K5, 247P, 246P, 231P, 203P, 117P, 73P, 31P
A77Chante-Perdrix Obs. in France, 11 in MPEC 2011-D06 -- P/2011 A4, P/2010 U2, P/2010 D2, C/2009 UG89, 248P, 123P, 117P, 88P, 73P, 43P, 29P
J01Cielo Profundo Obs. in Spain, 6 in MPEC 2011-D06 -- C/2010 X1, C/2010 G2, C/2009 K5, 247P, 123P, 103P
850Cordell-Lorenz Obs. in Tennessee, 3 in MPEC 2011-D06 -- C/2011 C1, C/2010 X1, 241P
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2011-D06 -- 162P
958Dax Obs. in France, 25 in MPEC 2011-D06 -- C/2011 A3, P/2011 A2, P/2011 A1, C/2010 X1, P/2010 WK, P/2010 U2, C/2010 S1, C/2010 B1, C/2009 Y1, C/2009 K5, C/2009 F2, C/2008 S3, 247P, 246P, 241P, 240P, 228P, 203P, 162P, 123P, 103P, 73P, 43P, 29P, 10P
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-D06 -- 103P
C18Frasnes-Lez-Anvaing Obs., 1 in MPEC 2011-D06 -- P/2010 WK
372Geisei Obs. in Japan, 9 in MPEC 2011-D06 -- C/2011 A3, P/2011 A1, C/2010 X1, P/2010 WK, P/2010 V1, P/2010 T1, C/2010 B1, 103P, 29P
203GiaGa Obs. in Italy, 2 in MPEC 2011-D06 -- 247P, 123P
B83Gieres Obs. in France, 3 in MPEC 2011-D06 -- C/2010 B1, 103P, 29P
379Hamamatsu-Yuto Obs. in Japan, 2 in MPECs 2011-D04 & 2011-D06 -- 2011 CG2, 103P
D88Hiratsuka Obs. in Japan, 3 in MPEC 2011-D06 -- C/2010 B1, 247P, 103P
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-D06 -- C/2011 C1, C/2010 X1, C/2010 D4
C15ISON-Ussuriysk Obs. in Russia, 2 in MPEC 2011-D06 -- C/2010 X1, 103P
J28Jaen Obs. in Spain, 2 in MPEC 2011-D06 -- P/2010 WK, 247P
G92Jarnac Obs. in Arizona, 1 in MPEC 2011-D06 -- 123P
585Kiev Comet Station in the Ukraine, 10 in MPEC 2011-D06 -- P/2011 A1, C/2010 B1, C/2009 K5, C/2005 L3, 240P, 123P, 103P, 43P, 31P, 29P
046Klet Obs. in the Czech Republic, 3 in MPEC 2011-D06 -- C/2010 X1, P/2010 WK, C/2009 K5
D95Kurihara Obs. in Japan, 10 in MPEC 2011-D06 -- C/2010 X1, P/2010 V1, C/2010 G2, C/2010 B1, C/2009 Y1, 247P, 103P, 81P, 74P, 29P
704LINEAR in New Mexico, 12 in MPECs 2011-D04 & 2011-D06 -- C/2011 A3, P/2011 A1, 23183, 5496, 241P, 231P, 228P, 203P, 162P, 117P, 71P, 31P
J31La Axarquia Obs. in Spain, 3 in MPEC 2011-D06 -- 240P, 103P, 31P
212La Dehesilla Obs. in Spain, 9 in MPEC 2011-D06 -- P/2011 A1, 241P, 240P, 231P, 203P, 123P, 103P, 31P, 29P
J38La Vara Obs. in Spain, 10 in MPEC 2011-D06 -- C/2010 S1, C/2010 B1, 247P, 241P, 240P, 223P, 123P, 103P, 31P, 29P
130Lumezzane Obs. in Italy, 9 in MPEC 2011-D06 -- C/2011 A3, P/2010 WK, C/2010 G3, C/2010 B1, C/2009 K5, 248P, 247P, 241P, 203P
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2011-D06 -- 9P
B82Maidbronn Obs. in Germany, 6 in MPEC 2011-D06 -- C/2010 S1, C/2010 B1, C/2009 K5, 247P, 223P, 123P
C10Maisoncelles Obs. in France, 3 in MPEC 2011-D06 -- 73P, 71P, 29P
J40Malaga Obs. in Spain, 5 in MPEC 2011-D06 -- C/2011 A3, P/2011 A1, C/2010 X1, 71P, 29P
A01Masia Cal Maciarol Modul 1 (MCM1) in Spain, 2 in MPEC 2011-D06 -- C/2010 G2, 29P
A06Mataro Obs. in Spain, 1 in MPEC 2011-D06 -- 240P
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2011-D02, 2011-D05 & 2011-D06 -- 2011 BU59, 2011 BT59, 9P
118Modra Obs. in Slovakia, 4 in MPEC 2011-D06 -- P/2010 WK, C/2010 S1, C/2009 K5, 247P
213Montcabre Obs. in Spain, 4 in MPEC 2011-D06 -- P/2011 A2, C/2010 B1, 123P, 103P
945Monte Deva Obs. in Spain, 10 in MPEC 2011-D06 -- C/2010 X1, P/2010 WK, C/2010 G2, C/2010 B1, C/2005 L3, 247P, 240P, 103P, 31P, 29P
B06Montseny Obs. in Spain, 3 in MPEC 2011-D06 -- C/2010 G2, 103P, 29P
900Moriyama Obs. in Japan, 10 in MPEC 2011-D06 -- P/2011 A1, C/2010 S1, C/2010 B1, C/2009 Y1, C/2009 K5, C/2005 L3, 247P, 123P, 103P, 31P
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2011-D01, 2011-D03 & 2011-D06 -- 2011 CY71, C/2011 C3, P/2010 D2, 244P, 137P
D81Nagano Obs. in Japan, 1 in MPEC 2011-D06 -- C/2005 L3
J47Nazaret Obs. in Spain, 9 in MPEC 2011-D06 -- C/2010 X1, C/2010 G2, C/2009 K5, C/2007 Q3, 247P, 241P, 103P, 29P, 10P
C23Olmen Obs. in Belgium, 2 in MPEC 2011-D06 -- C/2010 S1, 240P
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-D02 & 2011-D05 -- 2011 BU59, 2011 BT59
B49Paus Obs. in Spain, 1 in MPEC 2011-D06 -- 29P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2011-D06 -- C/2010 B1, C/2009 Y1, C/2009 K5
J53Posadas Obs. in Spain, 5 in MPEC 2011-D06 -- P/2010 WK, 247P, 240P, 123P, 103P
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-D06 -- C/2011 C1
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 7 in MPEC 2011-D06 -- P/2011 A4, C/2010 F3, P/2009 SK280, P/2009 QG31, C/2006 K4, 232P, 64P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 4 in MPEC 2011-D06 -- C/2010 FB87, 43P, 37P, 29P
E03`program code "`" (30) via RAS Obs. Victoria in Victoria, 1 in MPEC 2011-D06 -- C/2010 FB87
473Remanzacco Obs. in Italy, 1 in MPEC 2011-D06 -- C/2010 B1
071Rhozen Obs. in Bulgaria, 3 in MPEC 2011-D06 -- C/2010 G2, C/2009 K5, C/2007 Q3
939Rodeno Obs. in Spain, 4 in MPEC 2011-D06 -- C/2010 G2, 247P, 240P, 29P
C09Rouet Obs. in France, 7 in MPEC 2011-D06 -- P/2010 WK, C/2010 B1, 247P, 241P, 123P, 103P, 29P
461SZTE Asteroid Program in Hungary, 2 in MPEC 2011-D06 -- C/2010 G3, C/2008 P1
104San Marcello Pistoiese Obs. in Italy, 5 in MPEC 2011-D06 -- P/2010 U2, C/2010 S1, C/2010 B1, C/2009 T1, C/2009 K5
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-D01 -- C/2011 C3
B56Sant Pere Obs. in Spain, 1 in MPEC 2011-D06 -- 29P
B74Santa Maria de Montmagastrell Obs. in Spain, 4 in MPEC 2011-D06 -- C/2009 K5, 223P, 123P, 10P
204Schiaparelli Obs. in Italy, 11 in MPEC 2011-D06 -- C/2010 X1, C/2010 KW7, C/2009 Y1, C/2008 S3, C/2008 P1, 248P, 244P, 236P, 228P, 88P, 10P
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-D06 -- 9P
510Siegen Obs. in Germany, 1 in MPEC 2011-D06 -- 103P
G68Sierra Stars Obs. in northern California, 2 in MPEC 2011-D06 -- 105P, 103P
C14Sky Vistas Obs. in Austria, 3 in MPEC 2011-D06 -- 247P, 240P, 29P
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2011-D01, 2011-D04 & 2011-D06 -- 2011 CU4, 2011 CT4, 2011 CJ50, 2011 CB50, C/2011 C3, 2011 BV15, P/2011 A2
I28Starhoo Obs. in Massachusetts, 1 in MPEC 2011-D06 -- 231P
A71Stixendorf Obs. in Austria, 13 in MPEC 2011-D06 -- C/2011 A3, P/2011 A2, P/2011 A1, C/2010 X1, C/2010 G2, C/2010 B1, 247P, 240P, 231P, 228P, 203P, 123P, 29P
I40TRAPPIST in Chile, 2 in MPEC 2011-D06 -- 103P, 9P
H10Tzec Maun Obs. Mayhill in New Mexico, 17 in MPEC 2011-D06 -- C/2011 A3, P/2011 A2, P/2011 A1, C/2010 X1, P/2010 WK, C/2010 U3, C/2010 B1, 247P, 241P, 240P, 231P, 123P, 103P, 73P, 71P, 29P, 10P
D96Tzec Maun Obs. Moorook in South Australia, 6 in MPEC 2011-D06 -- C/2010 X1, C/2010 FB87, C/2009 F4, C/2006 W3, 103P, 29P
H47Vicksburg Obs. in Mississippi, 8 in MPEC 2011-D06 -- C/2010 X1, C/2010 G2, C/2010 B1, C/2009 K5, C/2005 L3, 123P, 43P, 29P
C42Xingming Obs. in China, 1 in MPEC 2011-D06 -- C/2011 C1
367Yatsuka Obs. in Japan, 12 in MPEC 2011-D06 -- P/2010 V1, C/2010 S1, C/2010 G2, C/2010 B1, C/2009 K5, C/2005 L3, 247P, 240P, 123P, 103P, 29P, 2P
J08Zonalunar Obs. in Spain, 2 in MPEC 2011-D06 -- 247P, 103P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 February '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 CL50JPL Sentry17272036-2110851.2e-04-5.65-6.050JPL: "Analysis based on 23 observations spanning 2.8545 days (2011-Feb-12.46221 to 2011-Feb-15.31668)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS17272043-2090672.18e-05-6.22-6.770NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-02-12.463 to 2011-02-15.317."
2011 CJ50JPL Sentry1727R E M O V E DJPL: Risk listing removed at 1128 UTC.
NEODyS1727R E M O V E D-
2011 CB50JPL Sentry1727210014.4e-08-5.57-5.570JPL: "Analysis based on 28 observations spanning 5.0434 days (2011-Feb-10.48858 to 2011-Feb-15.53201)." Diameter approximately 0.240 km. from mean, weighted H=20.7.
2011 CY46JPL Sentry1727R E M O V E DJPL: Risk listing removed at 1130 UTC.
NEODyS1727R E M O V E D-
2011 BU59JPL Sentry17272085-2110151.3e-05-5.72-5.810JPL: "Analysis based on 10 observations spanning 8.0869 days (2011-Jan-30.47535 to 2011-Feb-07.562215)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2011 BT59NEODyS17272041-208141.0e-08-5.24-5.250NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2011-01-30.537 to 2011-02-07.530."
JPL Sentry04112041-2107112.6e-07-4.30-4.650JPL: "Analysis based on 8 observations spanning 7.9934 days (2011-Jan-30.53603 to 2011-Feb-07.529449)." Diameter approximately 0.180 km. from mean, weighted H=21.3.
2011 BA12JPL Sentry17272079-211025.3e-09-7.47-7.510JPL: "Analysis based on 154 observations spanning 21.153 days (2011-Jan-25.1938 to 2011-Feb-15.34706)." Diameter approximately 0.100 km. from mean, weighted H=22.6.

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 February '11

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

1727Noted that JPL Sentry has updated its 2011 BA12 risk assessment - see above
Noted that NEODyS has posted 2011 BT59 as an impact risk - see above
Noted that JPL Sentry has posted 2011 BU59 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 CB50 risk assessment - see above
Noted that JPL Sentry has removed 2011 CJ50 as an impact risk - see above
Noted that NEODyS has removed 2011 CJ50 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 CL50 risk assessment - see above
Noted that NEODyS has updated its 2011 CL50 risk assessment - see above
Noted that JPL Sentry has removed 2011 CY46 as an impact risk - see above
Noted that NEODyS has removed 2011 CY46 as an impact risk - see above
Grabbed MPEC 2011-D04 - Daily Orbit Update - see above
Grabbed MPEC 2011-D05 - 2011 BU59 - see above
Grabbed MPEC 2011-D06 - Observations and Orbits of Comets - see above
0411Noted that JPL Sentry has posted 2011 BT59 as an impact risk - see above
0157Grabbed MPEC 2011-D01 - Comet C/2011 C3 (Gibbs) - see above
Grabbed MPEC 2011-D02 - 2011 BT59 - see above
Grabbed MPEC 2011-D03 - 2011 CY71 - see above
Noted that the NEOCP has become empty