Contents  on 29 September '09

Note: These A/CC news pages will update less often and less regularly through Tuesday, September 29th.

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 September '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and three updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eighteen listings on the NEOCP at some point 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 September '09

Minor Planet Electronic Circulars

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


MPEC 2009-S141 - "21:03 UT" - 2009 SS172


MPEC 2009-S140 - "20:38 UT" - 2009 SQ172


MPEC 2009-S139 - "12:50 UT" - 2002 WQ


MPEC 2009-S138 - "12:03 UT" - 2007 VH186


MPEC 2009-S137 - "12:00 UT" - 2008 DH23


MPEC 2009-S136 - "11:53 UT" - 2009 SW171


MPEC 2009-S135 - "11:50 UT" - 2009 SV171


MPEC 2009-S134 - "11:47 UT" - 2009 SU171


MPEC 2009-S133 - "11:44 UT" - 2009 ST171


MPEC 2009-S132 - "11:41 UT" - 2009 SS171


MPEC 2009-S131 - "11:37 UT" - 2009 SR171


MPEC 2009-S130 - "11:28 UT" - 2009 SQ171


MPEC 2009-S129 - "11:25 UT" - 2009 SP171


MPEC 2009-S128 - "11:09 UT" - 2004 XM35


<< DOU on 29 Sept. '09 >>  MPEC 2009-S127 - "06:11 UT" - Daily Orbit Update

Observers  on 29 September '09

A total of 24 observing facilities appear in today's MPECs.

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 3 in MPEC 2009-S127 -- 17274, 159402, 152664
B88Bigmuskie Obs. in Italy, 4 in MPEC 2009-S127 -- 2009 SO103, 2009 SG, 2009 RB4, 3361
160Castelmartini Obs. in Italy, 7 in MPEC 2009-S127 -- 2002 FB6, 218863, 17511, 154244, 138883, 12711, 3988
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2009-S127 & 2009-S135 -- 2009 SV171, 2009 SO98, 2009 RV1, 163697
G58Chabot Obs. in northern California, 7 in MPEC 2009-S127 -- 2009 SX17, 2009 SW19, 2009 SU104, 2009 ST103, 2009 SO103, 2009 SM103, 2009 SL104
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-S127 -- 2009 ST103
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-S141 -- 2009 SS172
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2009-S140 -- 2009 SQ172
J95Great Shefford Obs. in England, 8 in MPECs 2009-S127, 2009-S134, 2009-S135, 2009-S136 & 2009-S141 -- 2009 SW171, 2009 SV171, 2009 SU171, 2009 SU104, 2009 SS172, 2009 SO98, 2009 SN103, 2009 SH2
B19Iluro Obs. in Spain, 6 in MPEC 2009-S127 -- 2009 ST19, 2009 KC3, 22771, 154244, 143487, 138883
704LINEAR in New Mexico, 7 in MPEC 2009-S127 -- 2009 SO98, 2009 QH2, 2009 LX, 35396, 162181, 12711, 5646
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2009-S129, 2009-S135 & 2009-S136 -- 2009 SW171, 2009 SV171, 2009 SP171
474Mt. John Obs. in New Zealand, 3 in MPEC 2009-S127 -- 2009 SK1, 2009 SJ15, 2009 SH2
G96Mt. Lemmon Survey (MLS) in Arizona, 18 in MPECs 2009-S127, 2009-S129, 2009-S130, 2009-S131, 2009-S132, 2009-S133, 2009-S134, 2009-S135 & 2009-S141 -- 2009 SV171, 2009 SU171, 2009 SU104, 2009 ST171, 2009 SS172, 2009 SS171, 2009 SR171, 2009 SQ171, 2009 SQ104, 2009 SP171, 2009 RA4, 2009 FY29, 2007 RQ17, 2004 QT24, 99248, 218863, 215188, 16064
A13Naef Obs. in Switzerland, 3 in MPEC 2009-S127 -- 2009 SW19, 2009 SO98, 1993 RA
A32Panker Obs. in Germany, 1 in MPEC 2009-S127 -- 3200
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-S135 -- 2009 SV171
H36Sandlot Obs. in Kansas, 4 in MPECs 2009-S129, 2009-S135, 2009-S136 & 2009-S141 -- 2009 SW171, 2009 SV171, 2009 SS172, 2009 SP171
E12Siding Spring Survey (SSS) in New South Wales, 12 in MPECs 2009-S127 & 2009-S140 -- 2009 SW17, 2009 SU104, 2009 SQ172, 2009 SH2, 2009 SA100, 2009 RD1, 2009 HD21, 2002 RQ25, 2001 HZ7, 2000 RH60, 1993 RA, 20826
587Sormano Obs. in Italy, 1 in MPEC 2009-S127 -- 2009 SO98
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-S136 -- 2009 SW171
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2009-S127 & 2009-S136 -- 2009 SW19, 2009 SW171, 2009 SW1, 2009 SV17, 2009 SU19, 2009 SU104, 2009 ST103, 2009 ST, 2009 SQ104, 2009 SM98, 2009 SK104, 2009 SG18, 2009 SC1, 2009 SA
926Tenagra II Obs. in Arizona, 12 in MPECs 2009-S127, 2009-S128, 2009-S129, 2009-S130, 2009-S131, 2009-S134, 2009-S137, 2009-S138 & 2009-S139 -- 2009 SW19, 2009 SU171, 2009 ST103, 2009 SR171, 2009 SQ171, 2009 SP171, 2009 SN103, 2009 SH2, 2008 DH23, 2007 VH186, 2004 XM35, 2002 WQ
D20Zadko Obs. in Western Australia, 1 in MPEC 2009-S127 -- 2002 RQ25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 September '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 ST171JPL Sentry1445206612.3e-06-6.62-6.620JPL: "Analysis based on 19 observations spanning 1.1579 days (2009-Sep-28.23931 to 2009-Sep-29.39719)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2009 SP171JPL Sentry14452016-2109792.0e-07-3.54-3.850JPL: "Analysis based on 21 observations spanning 1.0904 days (2009-Sep-28.20541 to 2009-Sep-29.29576)." Diameter approximately 0.512 km. from mean, weighted H=19.1.
2009 SU104JPL Sentry1445R E M O V E DJPL: Risk listing removed at 0851 UTC.
2009 SQ104JPL Sentry14452039-210391.9e-09-6.44-7.050JPL: "Analysis based on 20 observations spanning 2.0508 days (2009-Sep-26.33466 to 2009-Sep-28.38543)." Diameter approximately 0.299 km. from mean, weighted H=20.3.
NEODyS14452048-208142.37e-10-7.44-7.880NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2009/09/26.335 to 2009/09/28.386."
2009 SK104JPL Sentry14452032-210444.5e-09-5.14-5.270JPL: "Analysis based on 28 observations spanning 2.9850 days (2009-Sep-25.35558 to 2009-Sep-28.34058)." Diameter approximately 0.588 km. from mean, weighted H=18.8.
NEODyS14452032-208031.54e-09-5.46-5.470NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/09/25.356 to 2009/09/28.341."
2009 ST103JPL Sentry14452058-210761.8e-08-4.41-4.530JPL: "Analysis based on 44 observations spanning 2.9849 days (2009-Sep-26.12896 to 2009-Sep-29.11383)." Diameter approximately 0.870 km. from mean, weighted H=17.9.
NEODyS1445R E M O V E D-
2009 SM98JPL Sentry1445205515.0e-08-5.82-5.820JPL: "Analysis based on 31 observations spanning 4.9607 days (2009-Sep-24.24446 to 2009-Sep-29.20516)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
NEODyS1445205513.91e-08-5.90-5.900NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/29.206."
2009 SW19JPL Sentry1445207115.7e-10-6.22-6.220JPL: "Analysis based on 47 observations spanning 5.7369 days (2009-Sep-23.18426 to 2009-Sep-28.92117)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS1445R E M O V E D-
2009 SG18JPL Sentry14452035-205066.3e-09-4.04-4.470JPL: "Analysis based on 39 observations spanning 7.9670 days (2009-Sep-21.17145 to 2009-Sep-29.13845)." Diameter approximately 0.930 km. from mean, weighted H=17.8.
NEODyS14452035-205063.13e-09-4.34-4.780NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/29.139."
2009 SH2JPL Sentry1445209611.5e-09-9.15-9.150JPL: "Analysis based on 73 observations spanning 10.283 days (2009-Sep-18.76541 to 2009-Sep-29.048618)." Diameter approximately 0.038 km. from mean, weighted H=24.8.

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 September '09

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

2358Grabbed MPEC 2009-S140 - 2009 SQ172 - see above
Grabbed MPEC 2009-S141 - 2009 SS172 - see above
1445Noted that JPL Sentry has updated its 2009 SG18 risk assessment - see above
Noted that NEODyS has updated its 2009 SG18 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SH2 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 posted 2009 SP171 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 SQ104 risk assessment - see above
Noted that NEODyS has updated its 2009 SQ104 risk assessment - see above
Noted that JPL Sentry has updated its 2009 ST103 risk assessment - see above
Noted that NEODyS has removed 2009 ST103 as an impact risk - see above
Noted that JPL Sentry has posted 2009 ST171 as an impact risk - see above
Noted that JPL Sentry has removed 2009 SU104 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 SW19 risk assessment - see above
Noted that NEODyS has removed 2009 SW19 as an impact risk - see above
Grabbed MPEC 2009-S127 - Daily Orbit Update - see above
Grabbed MPEC 2009-S128 - 2004 XM35 - see above
Grabbed MPEC 2009-S129 - 2009 SP171 - see above
Grabbed MPEC 2009-S130 - 2009 SQ171 - see above
Grabbed MPEC 2009-S131 - 2009 SR171 - see above
Grabbed MPEC 2009-S132 - 2009 SS171 - see above
Grabbed MPEC 2009-S133 - 2009 ST171 - see above
Grabbed MPEC 2009-S134 - 2009 SU171 - see above
Grabbed MPEC 2009-S135 - 2009 SV171 - see above
Grabbed MPEC 2009-S136 - 2009 SW171 - see above
Grabbed MPEC 2009-S137 - 2008 DH23 - see above
Grabbed MPEC 2009-S138 - 2007 VH186 - see above
Grabbed MPEC 2009-S139 - 2002 WQ - see above