Contents  on 21 August '09

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 21 August '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were four listings noted earlier today.

New MPECs  on 21 August '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-Q41 - "20:24 UT" - 2008 SO266


MPEC 2009-Q40 - "11:04 UT" - 2009 QR8


MPEC 2009-Q39 - "10:23 UT" - 2009 QQ8


MPEC 2009-Q38 - "10:21 UT" - 2009 QO8


<< DOU on 21 Aug. '09 >>  MPEC 2009-Q37 - "06:07 UT" - Daily Orbit Update


MPEC 2009-Q36 - "01:54 UT" - 2009 QL8

Observers  on 21 August '09

A total of 28 observing facilities appear in today's MPECs.

CodeObserver / observatory
J10Alicante Obs. in Spain, 1 in MPEC 2009-Q37 -- 2100
B75Betelgeuse Station in Italy, 3 in MPEC 2009-Q37 -- 35107, 22753, 4179
B88Bigmuskie Obs. in Italy, 2 in MPEC 2009-Q37 -- 2009 ML1, 2009 LX
215Buchloe Obs. in Germany, 1 in MPEC 2009-Q37 -- 4015
235CAST Obs. in Italy, 1 in MPEC 2009-Q36 -- 2009 QL8
160Castelmartini Obs. in Italy, 8 in MPEC 2009-Q37 -- 2009 QG2, 2009 QE8, 2009 OG, 2009 NE, 2009 KL2, 217390, 163697, 138925
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-Q36 & 2009-Q37 -- 2009 QL8, 2009 QC, 2007 RQ17, 2007 LL, 163697
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-Q37 -- 2009 QO
113Drebach Obs. in Germany, 1 in MPEC 2009-Q36 -- 2009 QL8
151Eschenberg Obs. in Switzerland, 2 in MPEC 2009-Q37 -- 2009 LX, 2002 NP1
J95Great Shefford Obs. in England, 6 in MPECs 2009-Q36, 2009-Q37 & 2009-Q39 -- 2009 QR, 2009 QQ8, 2009 QL8, 2009 QJ6, 2009 QH6, 2009 QG2
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-Q37 -- 4015
695]M. Trueblood & L. Lebofsky via Kitt Peak Natl. Obs. (KPNO) in Arizona, 4 in MPEC 2009-Q37 -- 2009 QM5, 2009 QL2, 2009 QJ6, 2009 QH6
704LINEAR in New Mexico, 6 in MPECs 2009-Q37 & 2009-Q39 -- 2009 QQ8, 2009 QG2, 2009 HB82, 217390, 5587, 2100
J75La Sagra Obs. in Spain, 1 in MPEC 2009-Q37 -- 52750
675Mt. Palomar in southern California, 1 in MPEC 2009-Q41 -- 2008 SO266
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-Q37 -- 17274, 433
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2009-Q39 -- 2009 QQ8
204Schiaparelli Obs. in Italy, 1 in MPEC 2009-Q36 -- 2009 QL8
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2009-Q37 & 2009-Q38 -- 2009 QW1, 2009 QO8, 2009 QJ2, 2009 PY, 2009 PR1
587Sormano Obs. in Italy, 5 in MPECs 2009-Q36 & 2009-Q37 -- 2009 QL8, 2009 QK2, 2009 QH6, 2009 QG2, 2009 OG
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2009-Q37 & 2009-Q40 -- 2009 QR8, 2009 QC, 1993 RA
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2009-Q37 & 2009-Q40 -- 2009 QR8, 2009 QO5, 2009 QM5, 2009 QH6, 2009 PH, 2006 WN1, 2006 OF15, 2005 EJ, 2003 TK, 2002 TA69, 2001 HZ7
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-Q37 -- 2006 EE1
I19Tanti Obs. in Argentina, 1 in MPEC 2009-Q38 -- 2009 QO8
H53Thompsonville Obs. in Illinois, 6 in MPEC 2009-Q37 -- 2009 OC, 2009 NE, 2002 NP1, 217390, 17274, 5626
C00Velikie Luki Obs., 1 in MPEC 2009-Q37 -- 433
J08Zonalunar Obs. in Spain, 1 in MPEC 2009-Q37 -- 2009 QG2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 August '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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
2009 QL8NEODyS14112015-2086325.56e-09-4.87-5.030NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2009/08/20.392 to 2009/08/21.063."
JPL Sentry05282016-2096186.0e-09-5.15-5.630JPL: "Analysis based on 22 observations spanning .67040 days (2009-Aug-20.39152 to 2009-Aug-21.06192)." Diameter approximately 0.434 km. from mean, weighted H=19.5.
2009 QZ6NEODyS14112020-206852.16e-10-5.49-5.670NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/08/19.367 to 2009/08/20.439."
2009 QH6NEODyS1411R E M O V E D-
JPL Sentry1411R E M O V E DJPL: Risk listing removed at 0853 UTC.
2009 QRNEODyS1411208712.1e-08-9.20-9.200NEODyS: "Based on 40 optical observations (of which 5 are rejected as outliers) from 2009/08/17.244 to 2009/08/21.076."

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 21 August '09

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

2102Grabbed MPEC 2009-Q41 - 2008 SO266 - see above
1411Noted that JPL Sentry has removed 2009 QH6 as an impact risk - see above
Noted that NEODyS has removed 2009 QH6 as an impact risk - see above
Noted that NEODyS has posted 2009 QL8 as an impact risk - see above
Noted that NEODyS has updated its 2009 QR risk assessment - see above
Noted that NEODyS has posted 2009 QZ6 as an impact risk - see above
Grabbed MPEC 2009-Q37 - Daily Orbit Update - see above
Grabbed MPEC 2009-Q38 - 2009 QO8 - see above
Grabbed MPEC 2009-Q39 - 2009 QQ8 - see above
Grabbed MPEC 2009-Q40 - 2009 QR8 - see above
Noted that the NEOCP has become empty
0528Noted that JPL Sentry has posted 2009 QL8 as an impact risk - see above
0205Grabbed MPEC 2009-Q36 - 2009 QL8 - see above