Contents  on 2 September '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 2 September '11

The MPC's NEO Confirmation Page has 20 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 20 objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 28 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 2 September '11

Minor Planet Electronic Circulars

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


MPEC 2011-R12 - "23:07 UT" - 2005 NX44


MPEC 2011-R11 - "17:54 UT" - Observations and Orbits of Comets


MPEC 2011-R10 - "17:26 UT" - 2009 DN1


MPEC 2011-R09 - "17:10 UT" - 2011 QD50


MPEC 2011-R08 - "16:07 UT" - 2010 SG13


<< DOU on 2 Sept. '11 >>  MPEC 2011-R07 - "06:03 UT" - Daily Orbit Update


MPEC 2011-R06 - "00:21 UT" - 2011 QS49

Observers  on 2 September '11

A total of 76 observers appear in today's MPECs.

CodeObserver / observatory
J57Alto Turia Obs. in Spain, 1 in MPEC 2011-R11 -- C/2006 S3
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-R11 -- 131P
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2011-R06, 2011-R07, 2011-R08 & 2011-R10 -- 2011 QV37, 2011 QS49, 2011 QS2, 2010 SG13, 2009 DN1
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-R07 -- 2011 OA
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2011-R11 -- 48P
I99Blanquita Obs. in Spain, 6 in MPEC 2011-R11 -- C/2009 Y1, C/2009 P1, C/2006 S3, 213P, 130P, 78P
215Buchloe Obs. in Germany, 18 in MPEC 2011-R11 -- C/2011 P2, P/2011 P1, C/2011 O1, C/2011 C1, C/2010 S1, P/2010 JC81, C/2010 G2, C/2009 Y1, C/2009 P2, C/2006 S3, 242P, 215P, 213P, 158P, 49P, 36P, 9P, 2P
235CAST Obs. in Italy, 5 in MPEC 2011-R11 -- C/2011 L3, C/2009 P1, C/2008 FK75, 213P, 78P
B66Casasco Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
I75Castellon Obs., 1 in MPEC 2011-R11 -- C/2009 P1
160Castelmartini Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
E00Castlemaine Obs. in Victoria, 1 in MPEC 2011-R11 -- C/2011 Q2
J01Cielo Profundo Obs. in Spain, 6 in MPEC 2011-R11 -- C/2010 G2, C/2009 P1, C/2008 FK75, 213P, 130P, 49P
B55Comeglians Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
C13Como Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2011-R11 -- C/2011 Q3
B50Corner Obs. in Germany, 3 in MPEC 2011-R11 -- C/2011 L3, C/2009 P1, 21P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-R07 -- 2011 PT1
113Drebach Obs. in Germany, 1 in MPEC 2011-R07 -- 2008 VH
639Dresden Obs. in Germany, 2 in MPEC 2011-R07 -- 2011 QF23, 37336
J19El Maestrat Obs. in Spain, 1 in MPEC 2011-R11 -- C/2009 P1
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 2 in MPEC 2011-R11 -- 213P, 2P
762Four Winds Obs. in Michigan, 1 in MPEC 2011-R11 -- C/2009 P1
372Geisei Obs. in Japan, 2 in MPEC 2011-R11 -- C/2011 Q1, P/2011 P1
J95Great Shefford Obs. in England, 3 in MPECs 2011-R06, 2011-R11 & 2011-R12 -- 2011 QS49, C/2011 Q3, 2005 NX44
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2011-R11 -- C/2011 Q2
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-R11 -- C/2009 P1
C32Ka-Dar Obs. TAU Station in Russia, 9 in MPEC 2011-R11 -- C/2010 R1, C/2008 S3, 242P, 158P, 130P, 81P, 78P, 36P, 21P
585Kiev Comet Station in the Ukraine, 7 in MPEC 2011-R11 -- C/2009 P1, 213P, 130P, 78P, 49P, 48P, 9P
046Klet Obs. in the Czech Republic, 1 in MPEC 2011-R11 -- C/2009 P1
C04Kramatorsk Obs. in the Ukraine, 2 in MPEC 2011-R11 -- 213P, 78P
D95Kurihara Obs. in Japan, 4 in MPEC 2011-R11 -- C/2011 F1, C/2011 A3, C/2009 P1, C/2006 S3
704LINEAR in New Mexico, 3 in MPECs 2011-R06 & 2011-R11 -- 2011 QS49, C/2006 S3, 213P
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 2 in MPEC 2011-R07 -- 2010 XB24, 101955
J38La Vara Obs. in Spain, 7 in MPEC 2011-R11 -- C/2010 R1, C/2009 P1, C/2008 FK75, 213P, 130P, 78P, 9P
J59Linceo Obs. in Spain, 7 in MPEC 2011-R11 -- C/2009 Y1, C/2009 P1, C/2006 S3, 213P, 130P, 78P, 48P
C10Maisoncelles Obs. in France, 8 in MPEC 2011-R11 -- C/2011 O1, C/2011 L3, C/2009 P1, C/2006 S3, 213P, 78P, 65P, 2P
J40Malaga Obs. in Spain, 2 in MPEC 2011-R11 -- 213P, 78P
B90Malina River Obs. in Italy, 1 in MPEC 2011-R11 -- C/2010 S1
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2011-R11 -- C/2011 L4, C/2010 D4, C/2010 D3
G49Minnetonka Obs., 1 in MPEC 2011-R11 -- C/2009 P1
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2011-R07 -- 2004 JO2, 2000 DQ110
118Modra Obs. in Slovakia, 1 in MPEC 2011-R11 -- C/2009 P1
213Montcabre Obs. in Spain, 1 in MPEC 2011-R11 -- C/2009 P1
945Monte Deva Obs. in Spain, 5 in MPEC 2011-R11 -- C/2010 S1, C/2010 G2, C/2009 P1, C/2008 FK75, C/2006 S3
108Montelupo Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
900Moriyama Obs. in Japan, 6 in MPEC 2011-R11 -- C/2011 L3, C/2009 P1, C/2006 S3, 213P, 78P, 48P
474Mt. John Obs. in New Zealand, 5 in MPECs 2011-R06, 2011-R07 & 2011-R09 -- 2011 QS49, 2011 QF14, 2011 QE23, 2011 QD50, 2008 RG1
E07Murrumbateman Obs. in New South Wales, 7 in MPEC 2011-R11 -- C/2011 Q3, C/2011 N2, C/2011 L2, P/2010 J5, 130P, 74P, 48P
A13Naef Obs. in Switzerland, 2 in MPEC 2011-R11 -- 78P, 36P
J47Nazaret Obs. in Spain, 3 in MPEC 2011-R11 -- C/2011 A3, C/2009 P1, 213P
I89Nerpio Obs. in Italy, 1 in MPEC 2011-R11 -- C/2010 S1
261&Rob Matson in southern California using the Palomar Digitized Sky Survey in southern California, 1 in MPEC 2011-R10 -- 2009 DN1
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2011-R11 -- 213P, 158P, 143P
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-R11 -- C/2009 P1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPECs 2011-R07 & 2011-R11 -- 2011 OV4, C/2011 L3, 2011 GA55, C/2009 P1, 2008 SR7, C/2008 FK75, 213P
J53Posadas Obs. in Spain, 1 in MPEC 2011-R11 -- C/2009 P1
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-R11 -- C/2009 P1
H06+program code "+" (20) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-R07 -- 226514
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 6 in MPEC 2011-R11 -- C/2011 Q3, C/2011 P2, P/2011 P1, C/2011 L3, P/2010 JC81, C/2010 G2
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 4 in MPECs 2011-R07, 2011-R09 & 2011-R11 -- 2011 QE48, 2011 QD50, 130P, 78P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 4 in MPEC 2011-R11 -- C/2011 Q2, C/2011 N2, C/2010 X1, C/2009 F4
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-R06 -- 2011 QS49
233San Vito Obs. in Italy, 1 in MPEC 2011-R11 -- C/2009 P1
C71Sant Marti Sesgueioles Obs., 2 in MPEC 2011-R11 -- C/2011 L3, C/2007 VO53
B38Santa Mama Obs. in Italy, 2 in MPEC 2011-R07 -- 2011 QS2, 37336
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2011-R09 & 2011-R11 -- 2011 QD50, C/2010 X1, 2P
G68Sierra Stars Obs. in northern California, 2 in MPEC 2011-R11 -- C/2011 L3, C/2009 P1
645Sloan Digital Sky Survey (SDSS) in New Mexico, 66 in MPEC 2011-R07 -- 2005 YS, 2005 NB7, 96744, 87311, 85709, 30825, 277475, 276786, 276392, 275558, 26760, 250697, 249816, 244670, 236716, 223456, 203217, 202411, 190135, 189008, 171819, 170903, 163692, 163000, 162980, 162911, 162741, 162186, 162149, 161998, 161995, 159504, 159368, 155140, 154658, 154347, 153591, 153249, 153243, 152964, 144411, 143637, 141354, 138847, 137099, 137078, 136849, 136618, 136564, 111253, 100004, 9202, 9162, 8201, 7025, 6569, 5646, 5587, 5143, 4183, 4015, 3352, 2201, 1943, 1627, 1221
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2011-R07 -- 2011 PE2, 2008 RG1
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2011-R06 -- 2011 QS49
A78Stia Obs. in Italy, 3 in MPEC 2011-R07 -- 2011 QS2, 2011 QF23, 16960
A71Stixendorf Obs. in Austria, 8 in MPEC 2011-R11 -- C/2011 O1, C/2011 A3, P/2010 JC81, C/2010 G2, 213P, 130P, 78P, 48P
C35Terrassa Obs., 2 in MPEC 2011-R11 -- C/2009 P1, 78P
B51Vallauris Obs. in France, 2 in MPEC 2011-R11 -- C/2009 P1, 213P
A48Verona Obs. in Italy, 2 in MPEC 2011-R07 -- 2011 OV4, 2011 MV1
H47Vicksburg Obs. in Mississippi, 6 in MPEC 2011-R11 -- C/2009 Y1, 213P, 130P, 78P, 48P, 9P
B42Vitebsk Obs. in Belarus, 7 in MPEC 2011-R11 -- C/2011 Q1, C/2011 L3, C/2010 S1, C/2008 FK75, 213P, 131P, 78P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 September '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 QF48NEODyS06082064-208232.08e-07-6.73-6.90NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2011-08-30.702 to 2011-09-01.652."
2011 QD48NEODyS06082014-2090593.29e-07-2.16-2.420NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2011-08-30.544 to 2011-09-01.605."
2011 PE2JPL Sentry15002027-210342.8e-04-2.17-2.170JPL: "Analysis based on 74 observations spanning 24.401 days (2011-Aug-08.06387 to 2011-Sep-01.4651)." Diameter approximately 0.084 km. from mean, weighted H=23.0.
NEODyS15002027-209028.19e-05-2.70-2.70NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2011-08-08.065 to 2011-09-01.466."

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 2 September '11

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

2359Grabbed MPEC 2011-R12 - 2005 NX44 - see above
1907Grabbed MPEC 2011-R09 - 2011 QD50 - see above
Grabbed MPEC 2011-R10 - 2009 DN1 - see above
Grabbed MPEC 2011-R11 - Observations and Orbits of Comets - see above
1649Grabbed MPEC 2011-R08 - 2010 SG13 - see above
1500Noted that JPL Sentry has updated its 2011 PE2 risk assessment - see above
Noted that NEODyS has updated its 2011 PE2 risk assessment - see above
Grabbed MPEC 2011-R07 - Daily Orbit Update - see above
0607Noted that NEODyS has posted 2011 QD48 as an impact risk - see above
Noted that NEODyS has posted 2011 QF48 as an impact risk - see above
0037Grabbed MPEC 2011-R06 - 2011 QS49 - see above