Contents  on 22 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 22 August '11

The MPC's NEO Confirmation Page has 1 listing

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed. This was a "one nighter." So far The Tracking News has counted a total of eight 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 22 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-Q13 - "16:37 UT" - 2010 RM64


MPEC 2011-Q12 - "16:28 UT" - Comet C/2011 Q1 (Panstarrs)


<< DOU on 22 Aug. '11 >>  MPEC 2011-Q11 - "06:02 UT" - Daily Orbit Update

Observers  on 22 August '11

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 1 in MPEC 2011-Q11 -- 2006 SU49
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2011-Q11, 2011-Q12 & 2011-Q13 -- C/2011 Q1, 2011 PU1, 2011 PO1, 2011 PE2, 2010 RM64
160Castelmartini Obs. in Italy, 2 in MPEC 2011-Q11 -- 2011 OY17, 2000 CP101
807|Robert Holmes via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-Q11 -- 2007 PH25
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2011-Q11 -- 2011 OC18, 2008 SR7
639Dresden Obs. in Germany, 3 in MPEC 2011-Q11 -- 2011 OV4, 2011 OQ5, 37336
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-Q12 -- C/2011 Q1
J95Great Shefford Obs. in England, 2 in MPEC 2011-Q11 -- 2011 QS2, 2011 PE2
704LINEAR in New Mexico, 1 in MPEC 2011-Q11 -- 2007 PH25
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2011-Q12 -- C/2011 Q1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-Q11 -- 2011 LJ19
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2011-Q11 -- 2011 OY17, 2011 LC19, 2011 GA55, 2000 CP101
C27Pallerols Obs. in Spain, 2 in MPEC 2011-Q11 -- 190208, 163760
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2011-Q11 & 2011-Q12 -- C/2011 Q1, 2004 QB17
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-Q13 -- 2010 RM64
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 4 in MPEC 2011-Q11 -- 2011 QT2, 2011 QS2, 2011 QE2, 2007 PH25
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 1 in MPEC 2011-Q11 -- 2007 PH25
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-Q11 -- 2008 VH
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-Q11 -- 2007 PH25
B38Santa Mama Obs. in Italy, 3 in MPEC 2011-Q11 -- 2011 JA8, 2000 CP101, 20086
204Schiaparelli Obs. in Italy, 9 in MPECs 2011-Q11 & 2011-Q12 -- C/2011 Q1, 2011 PU, 2011 OX4, 2011 ML, 2009 QZ6, 2006 SC6, 2004 JO2, 2000 RD34, 2000 CP101
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 Sentry15552027-210361.3e-04-2.57-2.620JPL: "Analysis based on 55 observations spanning 13.925 days (2011-Aug-08.06387 to 2011-Aug-21.98927)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
NEODyS15552027-209051.71e-04-2.45-2.490NEODyS: "Based on 55 optical observations (of which 0 are rejected as outliers) from 2011-08-08.065 to 2011-08-21.990."
2011 PU1JPL Sentry15552057-2105651.8e-04-4.08-4.690JPL: "Analysis based on 32 observations spanning 14.398 days (2011-Aug-06.9677 to 2011-Aug-21.365948)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
NEODyS15552061-2090922.01e-04-4.02-4.580NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2011-08-06.968 to 2011-08-21.367."

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 22 August '11

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

1643Grabbed MPEC 2011-Q12 - Comet C/2011 Q1 (Panstarrs) - see above
Grabbed MPEC 2011-Q13 - 2010 RM64 - see above
1555Noted that JPL Sentry has updated its 2011 PE2 risk assessment - see above
Noted that NEODyS has updated its 2011 PE2 risk assessment - 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-Q11 - Daily Orbit Update - see above