Contents  on 10 August '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 August '11

The MPC's NEO Confirmation Page is currently empty

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

New MPECs  on 10 August '11

Minor Planet Electronic Circulars

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


MPEC 2011-P44 - "16:48 UT" - Observations and Orbits of Comets


MPEC 2011-P43 - "13:48 UT" - 2011 OF45


<< DOU on 10 Aug. '11 >>  MPEC 2011-P42 - "06:06 UT" - Daily Orbit Update

Observers  on 10 August '11

A total of 58 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 4 in MPEC 2011-P44 -- P/2010 JC81, C/2010 G2, 213P, 9P
I92Astreo Obs., 2 in MPEC 2011-P44 -- C/2010 S1, C/2009 P1
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2011-P42 & 2011-P43 -- 2011 PX, 2011 PU, 2011 PS, 2011 OF45, 2011 OC18, 2011 OA
I99Blanquita Obs. in Spain, 5 in MPEC 2011-P44 -- C/2011 L3, C/2009 Y1, C/2009 P1, 213P, 78P
B96Brixiis Obs. in Belgium, 6 in MPEC 2011-P44 -- C/2011 L3, C/2009 Y1, C/2009 P1, C/2006 S3, 213P, 130P
B20Carmelita Obs. in Spain, 2 in MPEC 2011-P44 -- C/2009 P1, 213P
B53Casal Lumbroso Obs. in Italy, 1 in MPEC 2011-P44 -- C/2009 P1
A77Chante-Perdrix Obs. in France, 8 in MPEC 2011-P44 -- P/2011 P1, C/2011 C1, C/2009 P1, 213P-B, 213P, 158P, 65P, 2P
970Chelmsford Obs. in England, 3 in MPEC 2011-P44 -- C/2009 S3, C/2009 P1, C/2008 FK75
J01Cielo Profundo Obs. in Spain, 3 in MPEC 2011-P44 -- C/2009 P1, C/2008 FK75, 213P
B50Corner Obs. in Germany, 1 in MPEC 2011-P44 -- C/2011 L3
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2011-P44 -- C/2009 P1
J19El Maestrat Obs. in Spain, 2 in MPEC 2011-P44 -- C/2009 P1, 213P
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 3 in MPEC 2011-P44 -- P/2011 P1, 213P-B, 213P
E94Gisborne Obs. in New Zealand, 1 in MPEC 2011-P44 -- C/2009 F4
J95Great Shefford Obs. in England, 2 in MPEC 2011-P42 -- 2011 PU1, 2011 PE2
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2011-P44 -- 48P
C43Hoyerswerda Obs., 1 in MPEC 2011-P44 -- C/2009 P1
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2011-P44 -- 213P-B, 213P
D95Kurihara Obs. in Japan, 3 in MPEC 2011-P44 -- C/2011 F1, 115P, 21P
704LINEAR in New Mexico, 4 in MPECs 2011-P42 & 2011-P44 -- 2011 PO1, 2011 PE2, C/2009 UG89, 2009 AV
J31La Axarquia Obs. in Spain, 3 in MPEC 2011-P44 -- C/2009 Y1, 213P, 78P
J38La Vara Obs. in Spain, 4 in MPEC 2011-P44 -- C/2009 P1, C/2006 S3, 130P, 78P
J59Linceo Obs. in Spain, 3 in MPEC 2011-P44 -- C/2009 Y1, C/2009 P1, 48P
130Lumezzane Obs. in Italy, 4 in MPEC 2011-P44 -- C/2009 Y1, C/2009 P1, 130P, 48P
C10Maisoncelles Obs. in France, 3 in MPEC 2011-P44 -- P/2011 P1, 213P, 2P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-P43 -- 2011 OF45
213Montcabre Obs. in Spain, 1 in MPEC 2011-P44 -- C/2009 P1
945Monte Deva Obs. in Spain, 4 in MPEC 2011-P44 -- C/2010 G2, C/2009 P1, C/2006 S3, 213P
900Moriyama Obs. in Japan, 8 in MPEC 2011-P44 -- C/2009 Y1, C/2006 S3, 213P, 78P, 65P, 48P, 45P, 9P
I89Nerpio Obs. in Italy, 2 in MPEC 2011-P44 -- P/2011 P1, C/2009 Y1
557Ondrejov Obs. in the Czech Republic, 2 in MPEC 2011-P42 -- 267759, 3103
C27Pallerols Obs. in Spain, 1 in MPEC 2011-P42 -- 2000 CP101
F51Pan-STARRS 1 (PS1) in Hawaii, 21 in MPECs 2011-P42, 2011-P43 & 2011-P44 -- 2011 OX17, 2011 OV18, 2011 OS15, 2011 OF45, 2011 OE16, 2011 OE, 2011 OC18, 2011 NP, C/2011 L3, 2009 BB11, 2008 QF, 2007 YF1, 2006 WP127, 2006 SC6, 231134, 216115, 154268, 139345, 7888, 5731, 81P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2011-P44 -- C/2009 Y1, C/2009 P1, 213P, 78P
5611Janos Kelemen via Piszkesteto Station in Hungary, 1 in MPEC 2011-P42 -- 2008 LV16
941Pla D'Arguines Obs. in Spain, 1 in MPEC 2011-P44 -- 213P
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-P42 -- 2011 NZ
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 3 in MPEC 2011-P44 -- P/2011 P1, C/2011 C1, P/2010 JC81
D90|Hidetaka Sato in Japan via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-P44 -- P/2010 JC81
473Remanzacco Obs. in Italy, 1 in MPEC 2011-P44 -- C/2006 S3
939Rodeno Obs. in Spain, 6 in MPEC 2011-P44 -- C/2010 S1, C/2009 Y1, C/2009 P1, 213P, 130P, 78P
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-P44 -- 213P
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-P42 -- 2011 OW4
C71Sant Marti Sesgueioles Obs., 3 in MPEC 2011-P44 -- C/2009 Y1, 213P, 78P
B56Sant Pere Obs. in Spain, 2 in MPEC 2011-P44 -- C/2009 P1, 213P
204Schiaparelli Obs. in Italy, 4 in MPEC 2011-P44 -- C/2011 L3, C/2009 S3, C/2008 FK75, 81P
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2011-P42 & 2011-P44 -- 2011 PF2, P/2011 P1, 2009 QO5, 2009 OO9, 26760, 45P
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-P44 -- C/2011 L3
645Sloan Digital Sky Survey (SDSS) in New Mexico, 3 in MPEC 2011-P42 -- 154276, 144898, 139211
I93St. Pardon de Conques Obs. in France, 2 in MPEC 2011-P44 -- 213P-B, 213P
A71Stixendorf Obs. in Austria, 3 in MPEC 2011-P44 -- C/2009 P1, 213P, 48P
B51Vallauris Obs. in France, 2 in MPEC 2011-P44 -- 213P, 2P
H47Vicksburg Obs. in Mississippi, 7 in MPEC 2011-P44 -- C/2009 Y1, C/2009 P1, 213P, 130P, 78P, 48P, 9P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2011-P44 -- C/2011 L3, 213P, 78P
C28Wellinghofen Obs. in Germany, 1 in MPEC 2011-P44 -- C/2009 P1
C42Xingming Obs. in China, 1 in MPEC 2011-P44 -- 213P
367Yatsuka Obs. in Japan, 6 in MPEC 2011-P44 -- C/2011 O1, C/2009 P1, 213P, 130P, 115P, 48P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 August '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 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 PE2JPL Sentry16462027-211176.3e-05-2.87-2.930JPL: "Analysis based on 27 observations spanning 1.8819 days (2011-Aug-08.06387 to 2011-Aug-09.9458)." Diameter approximately 0.087 km. from mean, weighted H=23.0.
NEODyS16462027-209077.46e-05-2.80-2.860NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2011-08-08.065 to 2011-08-09.947."
2011 PU1JPL Sentry16462048-2109932.9e-04-3.90-4.380JPL: "Analysis based on 20 observations spanning 2.9505 days (2011-Aug-06.9677 to 2011-Aug-09.91821)." Diameter approximately 0.030 km. from mean, weighted H=25.2.
NEODyS16462048-20901092.45e-04-3.99-4.440NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2011-08-06.968 to 2011-08-09.919."

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 August '11

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

1823Grabbed MPEC 2011-P44 - Observations and Orbits of Comets - see above
1646Noted that JPL Sentry has updated its 2011 PE2 risk assessment - see above
Noted that NEODyS has posted 2011 PE2 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 PU1 risk assessment - see above
Noted that NEODyS has updated its 2011 PU1 risk assessment - see above
Grabbed MPEC 2011-P42 - Daily Orbit Update - see above
Grabbed MPEC 2011-P43 - 2011 OF45 - see above
Noted that the NEOCP has become empty