Contents  on 1 October '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 1 October '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There was one listing noted earlier today.

New MPECs  on 1 October '09

Minor Planet Electronic Circulars

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


<< DOU on 1 Oct. '09 >>  MPEC 2009-T01 - "06:09 UT" - Daily Orbit Update

Observers  on 1 October '09

Eighteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2009-T01 -- 2009 SV19, 2009 SU104, 2009 SR171, 2009 SR103, 2009 SP171, 2009 SM98, 2009 SM103, 2009 SL104, 2009 SG18, 2009 SC100, 2009 QF31
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-T01 -- 2000 CO101, 217796
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-T01 -- 2009 SW17, 2009 NH
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-T01 -- 2009 SM103
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 3 in MPEC 2009-T01 -- 2009 SH2, 2009 SD229, 2009 SC229
J95Great Shefford Obs. in England, 1 in MPEC 2009-T01 -- 2009 SU104
704LINEAR in New Mexico, 3 in MPEC 2009-T01 -- 2009 SX1, 2009 KC3, 6455
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPEC 2009-T01 -- 2009 HV67, 2007 HZ, 2006 PA1, 2004 XM35, 2002 OM4, 172974, 16064
423North Ryde Obs. in New South Wales, 1 in MPEC 2009-T01 -- 3753
233San Vito Obs. in Italy, 1 in MPEC 2009-T01 -- 2000 CO101
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPEC 2009-T01 -- 2009 SQ172, 2009 SH2, 2009 QJ9, 2009 HD21, 217807, 214088, 2062
071Smolyan Obs. in Bulgaria, 6 in MPEC 2009-T01 -- 2009 NA, 2009 ML1, 2009 MC9, 2005 MC, 2002 NW16, 159402
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2009-T01 -- 2009 SW1, 2009 SU, 2009 SQ104, 2009 SM104, 2009 SK104, 2009 SG18
926Tenagra II Obs. in Arizona, 9 in MPEC 2009-T01 -- 2009 SW19, 2009 ST104, 2009 SS104, 2009 SR104, 2009 SO98, 2009 SN103, 2009 SJ18, 2009 SH2, 2009 SB100
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-T01 -- 2009 SC229
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-T01 -- 159402
B51Vallauris Obs. in France, 1 in MPEC 2009-T01 -- 2009 QB36
G56Walnut Creek Obs. in northern California, 1 in MPEC 2009-T01 -- 2009 ST103
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 October '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 SD229JPL Sentry14022012-21091521.0e-07-3.37-3.870JPL: "Analysis based on 31 observations spanning 1.1411 days (2009-Sep-29.43433 to 2009-Sep-30.57547)." Diameter approximately 0.556 km. from mean, weighted H=18.9.
NEODyS14022012-2087532.34e-08-3.67-4.070NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/09/29.435 to 2009/09/30.576."
2009 SC229JPL Sentry14022017-2072212.7e-08-4.36-4.920JPL: "Analysis based on 31 observations spanning 1.1793 days (2009-Sep-29.34888 to 2009-Sep-30.52823)." Diameter approximately 0.590 km. from mean, weighted H=18.8.
NEODyS14022017-2090199.41e-09-4.73-5.010NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/09/29.350 to 2009/09/30.529."
2009 SP171NEODyS1402R E M O V E D-
JPL Sentry1402R E M O V E DJPL: Risk listing removed at 0931 UTC.
2009 SK104JPL Sentry14022032-2108104.2e-08-4.35-4.690JPL: "Analysis based on 31 observations spanning 4.8294 days (2009-Sep-25.35558 to 2009-Sep-30.18496)." Diameter approximately 0.609 km. from mean, weighted H=18.7.
NEODyS14022032-208621.16e-08-4.83-4.950NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/09/25.356 to 2009/09/30.186."
2009 ST103JPL Sentry1402R E M O V E DJPL: Risk listing removed at 0850 UTC.
2009 SM98JPL Sentry1402205519.0e-09-6.55-6.550JPL: "Analysis based on 37 observations spanning 5.9840 days (2009-Sep-24.24446 to 2009-Sep-30.22851)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS1402205514.8e-09-6.80-6.800NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/30.229."
2009 SG18NEODyS1402204412.51e-11-6.48-6.480NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/10/01.123."
JPL Sentry1402R E M O V E DJPL: Risk listing removed at 0850 UTC.

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 1 October '09

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

1402Noted that JPL Sentry has updated its 2009 SC229 risk assessment - see above
Noted that NEODyS has posted 2009 SC229 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 SD229 risk assessment - see above
Noted that NEODyS has posted 2009 SD229 as an impact risk - see above
Noted that JPL Sentry has removed 2009 SG18 as an impact risk - see above
Noted that NEODyS has updated its 2009 SG18 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SK104 risk assessment - see above
Noted that NEODyS has updated its 2009 SK104 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SM98 risk assessment - see above
Noted that NEODyS has updated its 2009 SM98 risk assessment - see above
Noted that JPL Sentry has removed 2009 SP171 as an impact risk - see above
Noted that NEODyS has removed 2009 SP171 as an impact risk - see above
Noted that JPL Sentry has removed 2009 ST103 as an impact risk - see above
Grabbed MPEC 2009-T01 - Daily Orbit Update - see above
Noted that the NEOCP has become empty