Contents  on 5 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 5 August '11

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 23 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 5 August '11

Minor Planet Electronic Circulars

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


MPEC 2011-P24 - "18:38 UT" - Comet P/2010 JC81 (WISE)


MPEC 2011-P23 - "17:04 UT" - Observations and Orbits of Comets


MPEC 2011-P22 - "16:29 UT" - 2011 PX


<< DOU on 5 Aug. '11 >>  MPEC 2011-P21 - "06:04 UT" - Daily Orbit Update


MPEC 2011-P20 - "00:06 UT" - Comet 45P/Honda-Mrkos-Pajdusakova

Observers  on 5 August '11

A total of 72 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 9 in MPEC 2011-P23 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 R1, 240P, 115P, 78P, 73P, 27P
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 1 in MPEC 2011-P21 -- 2000 CE59
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPECs 2011-P21, 2011-P22 & 2011-P23 -- 2011 PX, 2011 OY17, 2011 OB26, C/2011 O1, 2011 JK, 2011 GA62, 2011 BE38, 2008 GH110
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2011-P23 -- C/2011 L3, C/2009 P1
I99Blanquita Obs. in Spain, 4 in MPECs 2011-P21 & 2011-P23 -- C/2011 L3, C/2009 P1, C/2006 S3, 2000 CP101
B96Brixiis Obs. in Belgium, 3 in MPEC 2011-P23 -- C/2009 P1, C/2006 S3, 78P
G60Carroll Obs., 1 in MPEC 2011-P21 -- 3103
B53Casal Lumbroso Obs. in Italy, 1 in MPEC 2011-P23 -- C/2009 P1
160Castelmartini Obs. in Italy, 3 in MPEC 2011-P23 -- C/2011 L3, C/2009 P1, C/2006 S3
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2011-P21 -- 2011 OJ10, 2011 MF
A77Chante-Perdrix Obs. in France, 12 in MPEC 2011-P23 -- C/2009 Y1, C/2009 P1, C/2009 F2, C/2008 FK75, 242P, 213P, 130P, 115P, 78P, 49P, 21P, 9P
J01Cielo Profundo Obs. in Spain, 2 in MPEC 2011-P23 -- 213P, 48P
B50Corner Obs. in Germany, 1 in MPEC 2011-P23 -- C/2009 P1
095Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2011-P24 -- P/2010 JC81
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-P20 -- 45P
958Dax Obs. in France, 1 in MPEC 2011-P20 -- 45P
E85Farm Cove Obs. in New Zealand, 2 in MPEC 2011-P23 -- C/2011 A3, C/2006 S3
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 2 in MPEC 2011-P23 -- 213P, 2P
F659Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-P24 -- P/2010 JC81
203GiaGa Obs. in Italy, 3 in MPECs 2011-P21 & 2011-P23 -- 2011 OY17, C/2011 L3, 2008 TR10
E94Gisborne Obs. in New Zealand, 1 in MPEC 2011-P23 -- C/2010 X1
J95Great Shefford Obs. in England, 2 in MPECs 2011-P21 & 2011-P22 -- 2011 PX, 2011 OB26
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2011-P23 -- C/2009 P1
C43Hoyerswerda Obs., 1 in MPEC 2011-P23 -- C/2009 P1
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-P23 -- P/2011 NO1
585Kiev Comet Station in the Ukraine, 9 in MPECs 2011-P20 & 2011-P23 -- C/2011 L3, C/2011 F1, C/2011 A3, C/2010 G2, C/2009 P1, 213P, 130P, 78P, 45P
C04Kramatorsk Obs. in the Ukraine, 1 in MPEC 2011-P23 -- C/2009 P1
J31La Axarquia Obs. in Spain, 2 in MPEC 2011-P23 -- C/2011 L3, C/2009 P1
J38La Vara Obs. in Spain, 4 in MPECs 2011-P20 & 2011-P23 -- C/2009 P1, 213P, 78P, 45P
J59Linceo Obs. in Spain, 5 in MPEC 2011-P23 -- C/2009 P1, 213P, 130P, 78P, 48P
C01Lohrmann Obs. in Germany, 1 in MPEC 2011-P21 -- 2011 GA55
J48Mackay Obs. in the Canary Islands, 1 in MPEC 2011-P23 -- C/2009 P1
B82Maidbronn Obs. in Germany, 5 in MPEC 2011-P23 -- C/2011 L3, C/2010 R1, C/2009 UG89, C/2009 P1, 21P
C10Maisoncelles Obs. in France, 6 in MPEC 2011-P23 -- C/2011 L3, C/2009 P1, 213P, 78P, 65P, 9P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-P21 -- 2011 OE26
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-P21 -- 2011 JA8
152Moletai Obs. in Lithuania, 1 in MPEC 2011-P23 -- C/2006 S3
213Montcabre Obs. in Spain, 3 in MPECs 2011-P20 & 2011-P23 -- C/2009 P1, 213P, 45P
945Monte Deva Obs. in Spain, 3 in MPECs 2011-P20 & 2011-P23 -- C/2010 G2, C/2009 P1, 45P
108Montelupo Obs. in Italy, 1 in MPEC 2011-P23 -- C/2009 P1
900Moriyama Obs. in Japan, 3 in MPEC 2011-P23 -- C/2011 L3, C/2011 F1, C/2011 A3
J93Mt. Tuffley Obs. in England, 1 in MPEC 2011-P23 -- C/2009 P1
E07Murrumbateman Obs. in New South Wales, 5 in MPEC 2011-P23 -- C/2011 L2, C/2009 F4, C/2006 S3, 74P, 48P
A13Naef Obs. in Switzerland, 2 in MPEC 2011-P23 -- C/2009 S3, C/2008 FK75
J47Nazaret Obs. in Spain, 4 in MPEC 2011-P23 -- C/2011 L3, C/2010 X1, C/2009 P1, 21P
C47Nonndorf Obs., 5 in MPEC 2011-P23 -- C/2011 L3, C/2009 Y1, C/2009 P1, 213P, 78P
C23Olmen Obs. in Belgium, 2 in MPEC 2011-P23 -- 213P, 78P
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-P22 & 2011-P23 -- 2011 PX, 48P
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-P23 -- C/2009 P1
J52Pinsoro Obs. in Spain, 2 in MPEC 2011-P23 -- C/2009 Y1, C/2009 P1
J53Posadas Obs. in Spain, 1 in MPEC 2011-P23 -- C/2009 P1
I68Pousada dos Anoes Obs. in Brazil, 5 in MPEC 2011-P23 -- C/2011 L2, C/2010 X1, C/2009 Y1, C/2009 P1, C/2009 F4
I78Principia Obs., 1 in MPEC 2011-P23 -- C/2009 P1
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-P23 -- 213P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 8 in MPEC 2011-P23 -- P/2011 NO1, C/2011 M1, C/2011 C1, C/2010 U3, C/2010 A4, 158P, 45P, 36P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 7 in MPEC 2011-P23 -- C/2011 O1, C/2010 R1, C/2009 P1, C/2006 S3, 130P, 78P, 48P
D90|Hidetaka Sato in Japan via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-P24 -- P/2010 JC81
C09Rouet Obs. in France, 4 in MPEC 2011-P23 -- C/2009 P1, 213P, 78P, 48P
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-P23 -- C/2009 P2
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-P22 -- 2011 PX
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-P23 -- C/2009 P1
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2011-P21, 2011-P23 & 2011-P24 -- 2011 OB, P/2010 JC81, 2004 PY27, 45P, 2P
G68Sierra Stars Obs. in northern California, 3 in MPEC 2011-P23 -- C/2009 S3, C/2009 P1, C/2008 FK75
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2011-P22 -- 2011 PX
A78Stia Obs. in Italy, 2 in MPEC 2011-P21 -- 2006 YD, 68348
A71Stixendorf Obs. in Austria, 6 in MPECs 2011-P20 & 2011-P23 -- C/2010 S1, C/2009 P1, 213P, 130P, 48P, 45P
B30Szamotuly-Galowo Obs. in Poland, 3 in MPEC 2011-P23 -- C/2010 G2, 213P, 78P
I40TRAPPIST in Chile, 3 in MPEC 2011-P23 -- C/2009 P1, 213P, 9P
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-P23 -- C/2010 G2
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2011-P24 -- P/2010 JC81
B51Vallauris Obs. in France, 7 in MPEC 2011-P23 -- C/2011 L3, C/2010 S1, C/2009 P1, C/2008 FK75, 130P, 78P, 48P
H47Vicksburg Obs. in Mississippi, 9 in MPEC 2011-P23 -- C/2011 L3, C/2009 Y1, C/2009 P1, 213P, 130P, 115P, 78P, 48P, 21P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2011-P23 -- C/2011 L3, C/2009 P1, C/2008 FK75
C51WISE in Earth polar orbit, 1 in MPEC 2011-P24 -- P/2010 JC81
367Yatsuka Obs. in Japan, 8 in MPECs 2011-P20 & 2011-P23 -- C/2011 L3, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 P1, 48P, 45P, 27P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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 OB26JPL Sentry14292074-2109224.0e-05-4.95-5.390JPL: "Analysis based on 15 observations spanning 7.5460 days (2011-Jul-28.4734 to 2011-Aug-05.019421)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS14292085-208835.95e-09-8.61-8.980NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2011-07-28.474 to 2011-08-05.020."

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 5 August '11

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

1933Grabbed MPEC 2011-P24 - Comet P/2010 JC81 (WISE) - see above
1800Grabbed MPEC 2011-P23 - Observations and Orbits of Comets - see above
1704Grabbed MPEC 2011-P22 - 2011 PX - see above
1429Noted that JPL Sentry has updated its 2011 OB26 risk assessment - see above
Noted that NEODyS has updated its 2011 OB26 risk assessment - see above
Grabbed MPEC 2011-P21 - Daily Orbit Update - see above
0018Grabbed MPEC 2011-P20 - Comet 45P/Honda-Mrkos-Pajdusakova - see above