A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During September 2009

Compiled at 2359 UTC on 30 September 2009

<< August 2009 CRT | CRT Archive Index | October 2009 CRT >>

[ Today's risk monitoring & other observing news | object risks cleared in September | Ephemerides for Active Risk-Rated Objects ]

Missing something? Check the archives for objects not under active observation or recent analysis.

Notes: The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both risk monitors also post a few special objects with impact solutions beyond 100 years. For the latest official risk assessments, and for explanations of terminology and methodology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object
Risk
Monitor		A/CC Noted
 Time & Day 
UTC		0000T0000
Year
Range
VI
#		000NN00
Prob
Cum		T0000
PS
Cum		T0000
PS
Max
T
S

Notes for Latest Risk Assessments
2009 SD229JPL Sentry1703 Sept. 302012-21081921.9e-07-2.97-3.580Analysis based on 23 observations spanning 1.0325 days (2009-Sep-29.43433 to 2009-Sep-30.46683). Diameter approximately 0.608 km. from mean, weighted H=18.7.
An assessment posting was noted by A/CC on 30 Sept.   -   References: MPEC 2009-S144
2009 SC229JPL Sentry1703 Sept. 302013-2106515.0e-08-4.08-4.590Analysis based on 21 observations spanning 1.0714 days (2009-Sep-29.34888 to 2009-Sep-30.42031). Diameter approximately 0.619 km. from mean, weighted H=18.7.
An assessment posting was noted by A/CC on 30 Sept.   -   References: MPEC 2009-S143
2009 ST171JPL Sentry1445 Sept. 29206612.3e-06-6.62-6.620Analysis 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.
An assessment posting was noted by A/CC on 29 Sept.   -   References: MPEC 2009-S133
2009 SP171NEODyS1335 Sept. 302013-2087742.47e-07-2.97-3.170Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/09/28.206 to 2009/09/29.297.
JPL Sentry1335 Sept. 302029-2109901.5e-07-3.83-4.660Analysis based on 23 observations spanning 1.0904 days (2009-Sep-28.20541 to 2009-Sep-29.29576). Diameter approximately 0.513 km. from mean, weighted H=19.1.
Assessment postings were noted by A/CC on 29 Sept. & 30 Sept.   -   References: MPECs 2009-S129 & 2009-S142
2009 SK104NEODyS1445 Sept. 292032-208031.54e-09-5.46-5.470Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/09/25.356 to 2009/09/28.341.
JPL Sentry1445 Sept. 292032-210444.5e-09-5.14-5.270Analysis 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.
Assessment postings were noted by A/CC on 27 Sept., 28 Sept. & 29 Sept.   -   References: MPECs 2009-S111 & 2009-S127
2009 ST103NEODyS1445 Sept. 29R E M O V E D
JPL Sentry1445 Sept. 292058-210761.8e-08-4.41-4.530Analysis 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.
Assessment postings were noted by A/CC on 27 Sept., 28 Sept. & 29 Sept.   -   References: MPECs 2009-S106, 2009-S107, 2009-S123 & 2009-S127
2009 SM98NEODyS1335 Sept. 30205512.07e-09-7.18-7.180Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/30.229.
JPL Sentry1335 Sept. 30205513.2e-09-7.01-7.010Analysis based on 34 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.
Assessment postings were noted by A/CC on 24 Sept., 25 Sept., 27 Sept., 28 Sept., 29 Sept. & 30 Sept.   -   References: MPECs 2009-S87, 2009-S91, 2009-S107, 2009-S123, 2009-S127 & 2009-S142
2009 SG18NEODyS1335 Sept. 302037-204439.94e-10-4.85-5.050Based on 45 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/30.116.
JPL Sentry1335 Sept. 30204421.4e-09-4.71-4.930Analysis based on 45 observations spanning 8.9438 days (2009-Sep-21.17145 to 2009-Sep-30.11526). Diameter approximately 0.920 km. from mean, weighted H=17.8.
Assessment postings were noted by A/CC on 22 Sept., 23 Sept., 24 Sept., 25 Sept., 26 Sept., 28 Sept., 29 Sept. & 30 Sept.   -   References: MPECs 2009-S68, 2009-S77, 2009-S91, 2009-S98, 2009-S123, 2009-S127 & 2009-S142
2009 SD15NEODyS1428 Sept. 262066-208135.31e-07-7.26-7.270Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/09/19.243 to 2009/09/25.334.
JPL Sentry1428 Sept. 262081-210522.9e-07-7.52-7.520Analysis based on 15 observations spanning 6.0910 days (2009-Sep-19.24181 to 2009-Sep-25.33279). Diameter approximately 0.014 km. from mean, weighted H=26.9.
Assessment postings were noted by A/CC on 20 Sept., 21 Sept. & 26 Sept.   -   References: MPECs 2009-S58 & 2009-S98
2009 SH1NEODyS1620 Sept. 192068-208825.83e-09-11.12-11.240Based on 12 optical observations (of which 1 are rejected as outliers) from 2009/09/18.212 to 2009/09/18.391.
JPL Sentry1906 Sept. 182062-2107361.3e-06-8.35-8.620Analysis based on 11 observations spanning .17911 days (2009-Sep-18.21141 to 2009-Sep-18.39052). Diameter approximately 0.004 km. from mean, weighted H=29.5.
Assessment postings were noted by A/CC on 18 Sept. & 19 Sept.   -   References: MPEC 2009-S38
2009 RRJPL Sentry1900 Sept. 162098-2108137.6e-06-5.64-6.240Analysis based on 35 observations spanning 3.8834 days (2009-Sep-11.18242 to 2009-Sep-15.065792). Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS1654 Sept. 13R E M O V E D
Assessment postings were noted by A/CC on 11 Sept., 12 Sept., 13 Sept., 14 Sept., 15 Sept. & 16 Sept.   -   References: MPECs 2009-R39, 2009-R50, 2009-R54, 2009-R58 & 2009-S01
C   L   E   A   R   E   D
2009 SU104JPL Sentry1445 Sept. 29R E M O V E DRisk listing removed at 0851 UTC 29 Sept.
Assessment postings were noted by A/CC on 27 Sept., 28 Sept. & 29 Sept.   -   References: MPECs 2009-S121, 2009-S123, 2009-S127 & 2009-S142
2009 SQ104NEODyS1335 Sept. 30R E M O V E D
JPL Sentry1335 Sept. 30R E M O V E DRisk listing removed at 0930 UTC 30 Sept.
Assessment postings were noted by A/CC on 27 Sept., 28 Sept., 29 Sept. & 30 Sept.   -   References: MPECs 2009-S117, 2009-S127 & 2009-S142
2009 SZ99JPL Sentry1400 Sept. 27R E M O V E DRisk listing removed at 0856 UTC 27 Sept.
Assessment postings were noted by A/CC on 25 Sept. & 27 Sept.   -   References: MPECs 2009-S92, 2009-S107 & 2009-S123
2009 SO98JPL Sentry1320 Sept. 25R E M O V E DRisk listing removed at 0931 UTC 25 Sept.
Assessment postings were noted by A/CC on 24 Sept. & 25 Sept.   -   References: MPECs 2009-S89, 2009-S91, 2009-S127 & 2009-S142
2009 SW19JPL Sentry1335 Sept. 30R E M O V E DRisk listing removed at 0853 UTC 30 Sept.
NEODyS1445 Sept. 29R E M O V E D
Assessment postings were noted by A/CC on 23 Sept., 24 Sept., 25 Sept., 26 Sept., 28 Sept., 29 Sept. & 30 Sept.   -   References: MPECs 2009-S75, 2009-S77, 2009-S91, 2009-S98, 2009-S123, 2009-S127 & 2009-S142
2009 SW17NEODyS1342 Sept. 23R E M O V E D
JPL Sentry1342 Sept. 23R E M O V E DRisk listing removed at 0930 UTC 23 Sept.
Assessment postings were noted by A/CC on 22 Sept. & 23 Sept.   -   References: MPECs 2009-S65, 2009-S71, 2009-S77, 2009-S91, 2009-S107, 2009-S127 & 2009-S142
2009 SV17NEODyS1440 Sept. 24R E M O V E D
JPL Sentry1440 Sept. 24R E M O V E DRisk listing removed at 0930 UTC 24 Sept.
Assessment postings were noted by A/CC on 21 Sept., 22 Sept. & 24 Sept.   -   References: MPECs 2009-S64, 2009-S77, 2009-S91 & 2009-S127
2009 SC15JPL Sentry1440 Sept. 24R E M O V E DRisk listing removed at 0931 UTC 24 Sept.
NEODyS1342 Sept. 23R E M O V E D
Assessment postings were noted by A/CC on 20 Sept., 21 Sept., 23 Sept. & 24 Sept.   -   References: MPECs 2009-S57, 2009-S71, 2009-S77, 2009-S91 & 2009-S123
2009 SB15JPL Sentry1342 Sept. 23R E M O V E DRisk listing removed at 0852 UTC 23 Sept.
Assessment postings were noted by A/CC on 20 Sept. & 23 Sept.   -   References: MPECs 2009-S56, 2009-S71, 2009-S77 & 2009-S98
2009 SK2JPL Sentry1443 Sept. 20R E M O V E DRisk listing removed at 1027 UTC 20 Sept.
Assessment postings were noted by A/CC on 19 Sept. & 20 Sept.   -   References: MPECs 2009-S53, 2009-S55, 2009-S67, 2009-S91 & 2009-S98
2009 SH2JPL Sentry1335 Sept. 30R E M O V E DRisk listing removed at 0855 UTC 30 Sept.
NEODyS1402 Sept. 21R E M O V E D
Assessment postings were noted by A/CC on 19 Sept., 20 Sept., 21 Sept., 24 Sept., 25 Sept., 26 Sept., 27 Sept., 28 Sept., 29 Sept. & 30 Sept.   -   References: MPECs 2009-S51, 2009-S55, 2009-S63, 2009-S77, 2009-S91, 2009-S98, 2009-S107, 2009-S123, 2009-S127 & 2009-S142
2009 SG2JPL Sentry1443 Sept. 20R E M O V E DRisk listing removed at 1030 UTC 20 Sept.
Assessment postings were noted by A/CC on 19 Sept. & 20 Sept.   -   References: MPECs 2009-S50, 2009-S55, 2009-S63, 2009-S67, 2009-S71, 2009-S77, 2009-S91, 2009-S107, 2009-S123 & 2009-S142
2009 SX1NEODyS1443 Sept. 20R E M O V E D
JPL Sentry1443 Sept. 20R E M O V E DRisk listing removed at 1041 UTC 20 Sept.
Assessment postings were noted by A/CC on 19 Sept. & 20 Sept.   -   References: MPECs 2009-S45, 2009-S46, 2009-S55, 2009-S63, 2009-S77 & 2009-S98
2009 SW1NEODyS1443 Sept. 20R E M O V E D
JPL Sentry1443 Sept. 20R E M O V E DRisk listing removed at 0950 UTC 20 Sept.
Assessment postings were noted by A/CC on 19 Sept. & 20 Sept.   -   References: MPECs 2009-S44, 2009-S55, 2009-S63, 2009-S71, 2009-S77, 2009-S91, 2009-S98, 2009-S107, 2009-S123 & 2009-S127
2009 SN1NEODyS1402 Sept. 21R E M O V E D
JPL Sentry1402 Sept. 21R E M O V E DRisk listing removed at 0930 UTC 21 Sept.
Assessment postings were noted by A/CC on 18 Sept., 19 Sept. & 21 Sept.   -   References: MPECs 2009-S43, 2009-S63, 2009-S67, 2009-S71, 2009-S107 & 2009-S123
2009 SM1NEODyS1402 Sept. 21R E M O V E D
JPL Sentry1402 Sept. 21R E M O V E DRisk listing removed at 0851 UTC 21 Sept.
Assessment postings were noted by A/CC on 18 Sept., 19 Sept. & 21 Sept.   -   References: MPECs 2009-S42, 2009-S63, 2009-S67, 2009-S98 & 2009-S107
2009 SK1JPL Sentry1620 Sept. 19R E M O V E DRisk listing removed at 0933 UTC 19 Sept.
Assessment postings were noted by A/CC on 18 Sept. & 19 Sept.   -   References: MPECs 2009-S40, 2009-S46, 2009-S67, 2009-S107 & 2009-S127
2009 SVJPL Sentry1402 Sept. 21R E M O V E DRisk listing removed at 0850 UTC 21 Sept.
Assessment postings were noted by A/CC on 18 Sept., 19 Sept. & 21 Sept.   -   References: MPECs 2009-S32, 2009-S46, 2009-S63, 2009-S67, 2009-S77 & 2009-S123
2009 SKNEODyS1620 Sept. 19R E M O V E D
JPL Sentry1620 Sept. 19R E M O V E DRisk listing removed at 0932 UTC 19 Sept.
Assessment postings were noted by A/CC on 17 Sept., 18 Sept. & 19 Sept.   -   References: MPECs 2009-S12, 2009-S46, 2009-S55, 2009-S67, 2009-S77 & 2009-S142
2009 SDNEODyS1620 Sept. 19R E M O V E D
JPL Sentry1620 Sept. 19R E M O V E DRisk listing removed at 0853 UTC 19 Sept.
Assessment postings were noted by A/CC on 17 Sept., 18 Sept. & 19 Sept.   -   References: MPECs 2009-S07, 2009-S46, 2009-S55 & 2009-S67
2009 SBNEODyS1440 Sept. 24R E M O V E D
JPL Sentry1440 Sept. 24R E M O V E DRisk listing removed at 0854 UTC 24 Sept.
Assessment postings were noted by A/CC on 17 Sept., 18 Sept., 19 Sept., 20 Sept., 22 Sept., 23 Sept. & 24 Sept.   -   References: MPECs 2009-S05, 2009-S46, 2009-S55, 2009-S67, 2009-S71, 2009-S77 & 2009-S123
2009 RZ3JPL Sentry1342 Sept. 23R E M O V E DRisk listing removed at 0851 UTC 23 Sept.
NEODyS1342 Sept. 22R E M O V E D
Assessment postings were noted by A/CC on 15 Sept., 16 Sept., 17 Sept., 18 Sept., 19 Sept., 20 Sept., 21 Sept., 22 Sept. & 23 Sept.   -   References: MPECs 2009-R60, 2009-S04, 2009-S28, 2009-S46, 2009-S55, 2009-S63, 2009-S67, 2009-S71, 2009-S77, 2009-S91, 2009-S107 & 2009-S123
2009 RNJPL Sentry1900 Sept. 16R E M O V E DRisk listing removed at 1723 UTC 16 Sept.
NEODyS1654 Sept. 13R E M O V E D
Assessment postings were noted by A/CC on 11 Sept., 12 Sept., 13 Sept., 14 Sept., 15 Sept. & 16 Sept.   -   References: MPECs 2009-R38, 2009-R41, 2009-R50, 2009-R54, 2009-R58, 2009-S01, 2009-S04, 2009-S28, 2009-S67, 2009-S77, 2009-S98 & 2009-S123
2009 QB35NEODyS1531 Sept. 5R E M O V E D
JPL Sentry1318 Sept. 1R E M O V E DRisk listing removed at 0848 UTC 1 Sept.
Assessment postings were noted by A/CC on 1 Sept., 3 Sept. & 5 Sept.   -   References: MPECs 2009-R01, 2009-R04, 2009-R14, 2009-R26, 2009-R58, 2009-S01 & 2009-S04

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

For a list of risk-rated objects currently under observation, see our ephemerides page.

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" for more information.

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