Contents  on 29 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 29 August '11

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2304 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 27 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 29 August '11

Minor Planet Electronic Circulars

As of last check at 2304 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-Q51 - "19:35 UT" - 2011 QY37


MPEC 2011-Q50 - "19:33 UT" - 2011 QW37


MPEC 2011-Q49 - "19:31 UT" - 2011 QV37


MPEC 2011-Q48 - "19:29 UT" - 2011 QU37


MPEC 2011-Q47 - "16:39 UT" - 2010 XB24


<< DOU on 29 Aug. '11 >>  MPEC 2011-Q46 - "06:03 UT" - Daily Orbit Update


MPEC 2011-Q45 - "00:28 UT" - 2009 US87

Observers  on 29 August '11

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2011-Q45, 2011-Q46, 2011-Q48, 2011-Q49 & 2011-Q51 -- 2011 QY37, 2011 QY11, 2011 QX8, 2011 QV37, 2011 QU37, 2011 QS2, 2011 QJ21, 2011 QG9, 2011 QF23, 2011 QE23, 2011 QE2, 2011 QE14, 2011 QC14, 2011 PS, 2011 PF2, 2011 OY17, 2011 OX17, 2011 OV4, 2011 OR15, 2011 OQ5, 2011 OC18, 2011 MO4, 2009 US87
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-Q51 -- 2011 QY37
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2011-Q46 & 2011-Q51 -- 2011 QY37, 2011 QX8, 2011 QJ21, 2011 QG9, 2011 QF23, 2011 QF14, 2011 QE14, 2011 OP24, 2011 OL5, 2011 GC60
734Farpoint Obs. in Kansas, 2 in MPECs 2011-Q46 & 2011-Q51 -- 2011 QY37, 2011 PX
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-Q51 -- 2011 QY37
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-Q50 -- 2011 QW37
F654Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-Q46 -- 2011 PE2
379Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2011-Q46 -- 2011 QF23, 2011 GA55
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2011-Q46 & 2011-Q51 -- 2011 QY37, 2004 FH11
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPECs 2011-Q47, 2011-Q48, 2011-Q49 & 2011-Q50 -- 2011 QW37, 2011 QV37, 2011 QU37, 2010 XB24
474Mt. John Obs. in New Zealand, 1 in MPEC 2011-Q51 -- 2011 QY37
A13Naef Obs. in Switzerland, 2 in MPEC 2011-Q46 -- 2011 QC14, 138524
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2011-Q46, 2011-Q48, 2011-Q49 & 2011-Q50 -- 2011 QW37, 2011 QV37, 2011 QU37, 2011 EZ40, 253841
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-Q51 -- 2011 QY37
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-Q46 -- 283460
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-Q51 -- 2011 QY37
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-Q51 -- 2011 QY37
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2011-Q46 & 2011-Q51 -- 2011 QY37, 2011 QJ21, 2011 QE23, 2009 AV
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2011-Q50 -- 2011 QW37
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2011-Q46 -- 2011 OV4
A48Verona Obs. in Italy, 1 in MPEC 2011-Q46 -- 2011 QF23
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 August '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2304 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 Sentry14552027-210353.0e-04-2.15-2.161JPL: "Analysis based on 65 observations spanning 20.299 days (2011-Aug-08.06387 to 2011-Aug-28.3627)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
NEODyS14552027-209032.85e-04-2.16-2.161NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2011-08-08.065 to 2011-08-28.363."
2011 AG5JPL Sentry03122040-204755.3e-04-1.58-1.581JPL: "Analysis based on 184 observations spanning 229.15 days (2011-Jan-08.2673 to 2011-Aug-25.42026)." Diameter approximately 0.150 km. from mean, weighted H=21.8.

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 29 August '11

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

2018Grabbed MPEC 2011-Q48 - 2011 QU37 - see above
Grabbed MPEC 2011-Q49 - 2011 QV37 - see above
Grabbed MPEC 2011-Q50 - 2011 QW37 - see above
Grabbed MPEC 2011-Q51 - 2011 QY37 - see above
1711Grabbed MPEC 2011-Q47 - 2010 XB24 - see above
1455Noted 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-Q46 - Daily Orbit Update - see above
0312Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
0136Grabbed MPEC 2011-Q45 - 2009 US87 - see above