Contents  on 25 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.

Radar Astrometry  on 25 August '11

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1537 UTC when the database was dated 24 Aug.

NEOCP Activity  on 25 August '11

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 76 listings on the NEOCP today.

New MPECs  on 25 August '11

Minor Planet Electronic Circulars

As of last check at 2343 UTC, there have been eight MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-Q29 - "12:12 UT" - 2011 QF14


MPEC 2011-Q28 - "11:40 UT" - 2011 QE14


MPEC 2011-Q27 - "11:38 UT" - 2011 QC14


MPEC 2011-Q26 - "11:36 UT" - 2011 QA14


MPEC 2011-Q25 - "11:34 UT" - 2011 QZ13


<< DOU on 25 Aug. '11 >>  MPEC 2011-Q24 - "06:03 UT" - Daily Orbit Update


MPEC 2011-Q23 - "01:48 UT" - 2011 QY11


MPEC 2011-Q22 - "01:08 UT" - 2011 OL51

Observers  on 25 August '11

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2011-Q23, 2011-Q24, 2011-Q25 & 2011-Q28 -- 2011 QZ13, 2011 QY11, 2011 QS2, 2011 QE14, 2011 PU, 2011 PS, 2011 PF2, 2011 OY17, 2011 OV4, 2011 OQ5, 2011 OC18
807|Robert Holmes via Cerro Tololo Inter-American Obs. in Chile, 1 in MPECs 2011-Q22 & 2011-Q24 -- 2011 OL51
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2011-Q28 -- 2011 QE14
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-Q22 -- 2011 OL51
F654Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-Q25 -- 2011 QZ13
157Frasso Sabino Obs. in Italy, 4 in MPEC 2011-Q24 -- 2011 PF2, 2011 OQ5, 2011 LX10, 2008 EK1
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 45P
704LINEAR in New Mexico, 10 in MPECs 2011-Q24 & 2011-Q27 -- 2011 QC14, 2011 OV4, 2011 OQ5, 2011 NZ, 2011 JA8, 2008 CM, 2007 RQ17, 2004 QB17, 190491, 152942
J75La Sagra Obs. in Spain, 2 in MPECs 2011-Q28 & 2011-Q29 -- 2011 QF14, 2011 QE14
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-Q24 -- 2011 OW17
A13Naef Obs. in Switzerland, 4 in MPEC 2011-Q24 -- 2011 OV4, 2008 VH, 274855, 162162
A24New Millennium Obs. in Italy, 17 in MPEC 2011-Q24 -- 2011 OV4, 2011 NZ, 2011 MV1, 2011 KN9, 2008 VH, 2008 TR10, 2008 RJ1, 2000 CP101, 37336, 280136, 274855, 20086, 16960, 159399, 4596, 3988, 1917
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2011-Q22, 2011-Q23, 2011-Q24, 2011-Q25, 2011-Q26 & 2011-Q29 -- 5025 P-L, 2011 QZ13, 2011 QY11, 2011 QF14, 2011 QA14, 2011 OL51, 2011 OC18, 2006 SU49, 2000 DQ110, 162195, 7025
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 4 in MPECs 2011-Q22, 2011-Q24 & 2011-Q28 -- 2011 QX8, 2011 QG9, 2011 QE14, 2011 OL51
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2011-Q23 & 2011-Q26 -- 2011 QY11, 2011 QA14
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-Q26, 2011-Q27, 2011-Q28 & 2011-Q29 -- 2011 QF14, 2011 QE14, 2011 QC14, 2011 QA14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 August '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2343 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 QF14JPL Sentry15372039-2107141.5e-08-4.42-5.180JPL: "Analysis based on 9 observations spanning 2.3503 days (2011-Aug-22.98995 to 2011-Aug-25.340232)." Diameter approximately 0.897 km. from mean, weighted H=17.9.

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 25 August '11

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

1537Noted that JPL Sentry has posted 2011 QF14 as an impact risk - see above
Grabbed MPEC 2011-Q24 - Daily Orbit Update - see above
Grabbed MPEC 2011-Q25 - 2011 QZ13 - see above
Grabbed MPEC 2011-Q26 - 2011 QA14 - see above
Grabbed MPEC 2011-Q27 - 2011 QC14 - see above
Grabbed MPEC 2011-Q28 - 2011 QE14 - see above
Grabbed MPEC 2011-Q29 - 2011 QF14 - see above
Noted Radar Astrometry database update - see above
0159Grabbed MPEC 2011-Q22 - 2011 OL51 - see above
Grabbed MPEC 2011-Q23 - 2011 QY11 - see above