A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During September 2008

Compiled at 2359 UTC on 30 September 2008

<< August 2008 CRT | CRT Archive Index | October 2008 CRT >>

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

Missing something? Here are 99942 Apophis (2004 MN4) and 144898 2004 VD17. Check the archives for others.

Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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	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

2008 SH148	NEODyS	1516 Sept. 30	2011-2087	66	4.42e-07	-6.72	-7.53	0	Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/09/29.190 to 2008/09/29.292.
	JPL Sentry	0215 Sept. 30	2011-2107	189	1.0e-06	-6.43	-7.12	0	Analysis based on 11 observations spanning .10211 days (2008-Sep-29.18897 to 2008-Sep-29.29108). Diameter approximately 0.020 km. from mean, weighted H=26.1.
	Assessment postings were noted by A/CC on 30 Sept. - References: MPEC 2008-S91

2008 SE85	NEODyS	1515 Sept. 30	2011-2090	103	1.96e-07	-3.02	-3.27	0	Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/09/28.449 to 2008/09/29.408.
	JPL Sentry	1515 Sept. 30	2013-2107	39	6.5e-08	-3.72	-3.78	0	Analysis based on 20 observations spanning .95911 days (2008-Sep-28.44782 to 2008-Sep-29.40693). Diameter approximately 0.390 km. from mean, weighted H=19.7.
	Assessment postings were noted by A/CC on 29 Sept. & 30 Sept. - References: MPECs 2008-S89 & 2008-S93

2008 SJ82	NEODyS	1456 Sept. 28	2088	1	7.46e-09	-6.36	-6.36	0	Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/09/26.748 to 2008/09/27.783.
	JPL Sentry	1456 Sept. 28	2088-2096	4	3.2e-08	-5.67	-6.07	0	Analysis based on 15 observations spanning 1.0351 days (2008-Sep-26.74755 to 2008-Sep-27.7827). Diameter approximately 0.240 km. from mean, weighted H=20.8.
	Assessment postings were noted by A/CC on 27 Sept. & 28 Sept. - References: MPECs 2008-S80 & 2008-S83

2008 SH82	NEODyS	1515 Sept. 30	2032-2088	14	2.0e-07	-4.85	-5.40	0	Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/09/29.261.
	JPL Sentry	2111 Sept. 29	2032-2106	29	3.0e-07	-4.66	-5.26	0	Analysis based on 18 observations spanning 3.0472 days (2008-Sep-26.21299 to 2008-Sep-29.26018). Diameter approximately 0.215 km. from mean, weighted H=21.0.
	Assessment postings were noted by A/CC on 28 Sept., 29 Sept. & 30 Sept. - References: MPECs 2008-S79, 2008-S83 & 2008-S93

2008 SV11	NEODyS	2249 Sept. 30	2034-2089	13	9.07e-08	-3.41	-3.67	0	Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/09/25.263 to 2008/09/30.378.
	JPL Sentry	2116 Sept. 30	2009-2085	11	1.4e-07	-3.00	-3.33	0	Analysis based on 44 observations spanning 5.1147 days (2008-Sep-25.26245 to 2008-Sep-30.37718). Diameter approximately 0.756 km. from mean, weighted H=18.3.
	Assessment postings were noted by A/CC on 26 Sept., 27 Sept., 29 Sept. & 30 Sept. - References: MPECs 2008-S65, 2008-S85 & 2008-S93

2008 ST7	NEODyS	1515 Sept. 30	2050-2089	9	4.18e-06	-5.08	-5.41	0	Based on 51 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/09/29.327.
	JPL Sentry	1515 Sept. 30	2073-2102	47	2.7e-05	-4.37	-5.10	0	Analysis based on 48 observations spanning 5.0264 days (2008-Sep-24.29993 to 2008-Sep-29.32635). Diameter approximately 0.053 km. from mean, weighted H=24.0.
	Assessment postings were noted by A/CC on 25 Sept., 26 Sept., 27 Sept., 29 Sept. & 30 Sept. - References: MPECs 2008-S56, 2008-S69, 2008-S85 & 2008-S93

2008 ST	NEODyS	1445 Sept. 27	2047-2082	12	2.9e-05	-5.91	-6.07	0	Based on 31 optical observations (of which 0 are rejected as outliers) from 2008/09/22.162 to 2008/09/26.045.
	JPL Sentry	1445 Sept. 27	2047-2108	24	6.9e-05	-5.62	-6.05	0	Analysis based on 31 observations spanning 3.8835 days (2008-Sep-22.16113 to 2008-Sep-26.04466). Diameter approximately 0.013 km. from mean, weighted H=27.1.
	Assessment postings were noted by A/CC on 22 Sept., 23 Sept., 25 Sept. & 27 Sept. - References: MPECs 2008-S33, 2008-S36, 2008-S51 & 2008-S69

2008 KN11	NEODyS	1931 Sept. 30	2046	1	2.32e-07	-5.62	-5.62	0	Based on 132 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/21.154.
2008 KN11	Assessment postings were noted by A/CC on 22 Sept. & 30 Sept. - References: no MPECs

2006 CD	JPL Sentry	1759 Sept. 17	2015-2094	58	3.1e-08	-5.30	-5.97	0	Analysis based on 12 observations spanning 1.9971 days (2006-Feb-01.1555 to 2006-Feb-03.15263). Diameter approximately 0.213 km. from mean, weighted H=21.0.
2006 CD	An assessment posting was noted by A/CC on 17 Sept. - References: no recent MPECs
C L E A R E D
2008 SU1	JPL Sentry	1514 Sept. 25	R E M O V E D						Risk listing removed at 0852 UTC 25 Sept.
	NEODyS	1514 Sept. 25	R E M O V E D
	Assessment postings were noted by A/CC on 24 Sept. & 25 Sept. - References: MPECs 2008-S42, 2008-S51, 2008-S63, 2008-S69 & 2008-S85

2008 SR	JPL Sentry	1353 Sept. 23	R E M O V E D						Risk listing removed at 0849 UTC 23 Sept.
2008 SR	Assessment postings were noted by A/CC on 22 Sept. & 23 Sept. - References: MPECs 2008-S31, 2008-S36, 2008-S45 & 2008-S63

2008 SO	JPL Sentry	1353 Sept. 23	R E M O V E D						Risk listing removed at 0849 UTC 23 Sept.
2008 SO	Assessment postings were noted by A/CC on 22 Sept. & 23 Sept. - References: MPECs 2008-S28, 2008-S36, 2008-S45, 2008-S51, 2008-S69 & 2008-S93

2008 RM98	NEODyS	1445 Sept. 27	R E M O V E D
	JPL Sentry	1445 Sept. 27	R E M O V E D						Risk listing removed at 0851 UTC 27 Sept.
	Assessment postings were noted by A/CC on 26 Sept. & 27 Sept. - References: MPECs 2008-S61 & 2008-S69

2008 RJ1	NEODyS	1702 Sept. 10	R E M O V E D
	JPL Sentry	1702 Sept. 10	R E M O V E D						Risk listing removed at 0849 UTC 10 Sept.
	Assessment postings were noted by A/CC on 5 Sept., 6 Sept., 7 Sept. & 10 Sept. - References: MPECs 2008-R28, 2008-R32, 2008-R55, 2008-R61, 2008-S13, 2008-S19, 2008-S20, 2008-S45, 2008-S63 & 2008-S93

2008 RH1	NEODyS	1627 Sept. 7	R E M O V E D
2008 RH1	Assessment postings were noted by A/CC on 6 Sept. & 7 Sept. - References: MPECs 2008-R27, 2008-R32, 2008-R35, 2008-R64, 2008-S03, 2008-S12, 2008-S13, 2008-S45, 2008-S51, 2008-S63, 2008-S85 & 2008-S93

2008 RG1	NEODyS	1627 Sept. 7	R E M O V E D
	JPL Sentry	1627 Sept. 7	R E M O V E D						Risk listing removed at 0852 UTC 7 Sept.
	Assessment postings were noted by A/CC on 5 Sept., 6 Sept. & 7 Sept. - References: MPECs 2008-R26, 2008-R32, 2008-R35, 2008-R64, 2008-S01, 2008-S19, 2008-S20, 2008-S45 & 2008-S93

2008 RV	JPL Sentry	1348 Sept. 6	R E M O V E D						Risk listing removed at 0850 UTC 6 Sept.
2008 RV	Assessment postings were noted by A/CC on 4 Sept. & 6 Sept. - References: MPECs 2008-R18, 2008-R31, 2008-R32, 2008-R55, 2008-R61, 2008-S13, 2008-S19, 2008-S36, 2008-S69 & 2008-S83

2008 OO	JPL Sentry	1448 Sept. 2	R E M O V E D						Risk listing removed at 0852 UTC 2 Sept.
2008 OO	An assessment posting was noted by A/CC on 2 Sept. - References: MPECs 2008-R10 & 2008-R15

2008 LA	NEODyS	1445 Sept. 27	R E M O V E D
	JPL Sentry	1445 Sept. 27	R E M O V E D						Risk listing removed at 0851 UTC 27 Sept.
	Assessment postings were noted by A/CC on 27 Sept. - References: MPEC 2008-S69

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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