A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During October 2009

Compiled at 2359 UTC on 31 October 2009

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[ Today's risk monitoring & other observing news | object risks cleared in October | 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 TD17	NEODyS	1533 Oct. 22	2039-2090	60	7.05e-05	-5.44	-5.55	0	Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/10/09.328 to 2009/10/11.330.
	JPL Sentry	2130 Oct. 21	2039-2096	51	8.9e-05	-5.31	-5.36	0	Analysis based on 19 observations spanning 2.0022 days (2009-Oct-09.32683 to 2009-Oct-11.329). Diameter approximately 0.010 km. from mean, weighted H=27.7.
	Assessment postings were noted by A/CC on 21 Oct. & 22 Oct. - References: MPEC 2009-U61

2009 TM8	JPL Sentry	2202 Oct. 20	2079-2109	107	6.6e-05	-6.26	-7.38	0	Analysis based on 48 observations spanning 2.2516 days (2009-Oct-15.2109 to 2009-Oct-17.46255). Diameter approximately 0.007 km. from mean, weighted H=28.6.
	NEODyS	1543 Oct. 18	2079-2089	16	4.76e-06	-7.33	-7.95	0	Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/10/15.212 to 2009/10/17.463.
	Assessment postings were noted by A/CC on 15 Oct., 16 Oct., 17 Oct., 18 Oct. & 20 Oct. - References: MPECs 2009-T65, 2009-U01, 2009-U15 & 2009-U26

2009 TH8	JPL Sentry	2000 Oct. 20	2068-2100	4	9.1e-06	-5.18	-5.30	0	Analysis based on 41 observations spanning 3.9348 days (2009-Oct-14.54405 to 2009-Oct-18.47885). Diameter approximately 0.036 km. from mean, weighted H=24.9.
	NEODyS	1543 Oct. 18	R E M O V E D
	Assessment postings were noted by A/CC on 15 Oct., 16 Oct., 17 Oct., 18 Oct., 19 Oct. & 20 Oct. - References: MPECs 2009-T62, 2009-U15, 2009-U26 & 2009-U36

2009 TU	NEODyS	1315 Oct. 23	2086	3	2.15e-05	-5.88	-6.32	0	Based on 58 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/18.464.
	JPL Sentry	1315 Oct. 23	2086-2095	5	2.2e-05	-5.87	-6.32	0	Analysis based on 57 observations spanning 8.2739 days (2009-Oct-10.18978 to 2009-Oct-18.463635). Diameter approximately 0.011 km. from mean, weighted H=27.4.
	Assessment postings were noted by A/CC on 10 Oct., 11 Oct., 12 Oct., 13 Oct., 14 Oct., 15 Oct., 17 Oct. & 23 Oct. - References: MPECs 2009-T34, 2009-T35, 2009-T38, 2009-T40, 2009-T49, 2009-T55, 2009-U15 & 2009-U69

2009 TB	NEODyS	1735 Oct. 5	2014-2075	37	1.48e-05	-6.25	-6.97	0	Based on 12 optical observations (of which 0 are rejected as outliers) from 2009/10/02.207 to 2009/10/02.314.
	An assessment posting was noted by A/CC on 5 Oct. - References: MPEC 2009-T07

2006 SF281	JPL Sentry	0306 Oct. 10	2014-2105	332	1.6e-06	-6.21	-8.11	0	Analysis based on 16 observations spanning .02717 days (2006-Sep-30.48927 to 2006-Sep-30.51644). Diameter approximately 0.020 km. from mean, weighted H=26.2.
	An assessment posting was noted by A/CC on 10 Oct. - References: no recent MPECs

99942 Apophis (2004 MN4)	NEODyS	0453 Oct. 8	2036-2103	6	7.36e-06	-2.97	-3.08	0	Based on 1399 optical observations (of which 5 are rejected as outliers) from 2004/03/15.127 to 2008/01/09.666 and also on seven radar data points on 2005/01/27, 2005/01/29, 2005/01/31, 2005/08/07 and 2006/05/06.
	JPL Sentry	0253 Oct. 8	2036-2103	6	7.4e-06	-2.97	-3.08	0	Analysis based on 2 radar delay, 5 Doppler, and 633 optical observations spanning 1395.6 days (2004-Mar-15.10789 to 2008-Jan-09.665088). Diameter approximately 0.270 km. from mean, weighted H=19.7.
	Assessment postings were noted by A/CC on 8 Oct. - References: MPEC 2009-T16
C L E A R E D
2009 UZ87	JPL Sentry	1409 Oct. 30	R E M O V E D						Risk listing removed at 0953 UTC 30 Oct.
	Assessment postings were noted by A/CC on 28 Oct. & 30 Oct. - References: MPECs 2009-U122, 2009-U128 & 2009-U140

2009 UY87	JPL Sentry	1409 Oct. 30	R E M O V E D						Risk listing removed at 0950 UTC 30 Oct.
	NEODyS	1406 Oct. 30	R E M O V E D
	Assessment postings were noted by A/CC on 27 Oct., 28 Oct. & 30 Oct. - References: MPECs 2009-U121, 2009-U128 & 2009-U140

2009 UV87	NEODyS	1509 Oct. 29	R E M O V E D
	JPL Sentry	1509 Oct. 29	R E M O V E D						Risk listing removed at 0849 UTC 29 Oct.
	Assessment postings were noted by A/CC on 27 Oct., 28 Oct. & 29 Oct. - References: MPECs 2009-U118, 2009-U125 & 2009-U140

2009 UL20	JPL Sentry	1323 Oct. 27	R E M O V E D						Risk listing removed at 0850 UTC 27 Oct.
	Assessment postings were noted by A/CC on 26 Oct. & 27 Oct. - References: MPECs 2009-U105, 2009-U112 & 2009-U124

2009 UW18	NEODyS	1347 Oct. 26	R E M O V E D
	JPL Sentry	1347 Oct. 26	R E M O V E D						Risk listing removed at 0852 UTC 26 Oct.
	Assessment postings were noted by A/CC on 24 Oct., 25 Oct. & 26 Oct. - References: MPECs 2009-U75, 2009-U103, 2009-U112, 2009-U128 & 2009-U140

2009 UV18	JPL Sentry	1323 Oct. 27	R E M O V E D						Risk listing removed at 0847 UTC 27 Oct.
	NEODyS	1347 Oct. 26	R E M O V E D
	Assessment postings were noted by A/CC on 24 Oct., 25 Oct., 26 Oct. & 27 Oct. - References: MPECs 2009-U74, 2009-U91, 2009-U103, 2009-U112, 2009-U124, 2009-U127 & 2009-U140

2009 UK14	JPL Sentry	1315 Oct. 23	R E M O V E D						Risk listing removed at 1031 UTC 23 Oct.
	Assessment postings were noted by A/CC on 22 Oct. & 23 Oct. - References: MPECs 2009-U66, 2009-U69, 2009-U73, 2009-U112 & 2009-U140

2009 UN3	NEODyS	1544 Oct. 31	R E M O V E D
	JPL Sentry	2358 Oct. 30	R E M O V E D						Risk listing removed at 2348 UTC 30 Oct.
	Assessment postings were noted by A/CC on 20 Oct., 21 Oct., 22 Oct., 23 Oct., 25 Oct., 30 Oct. & 31 Oct. - References: MPECs 2009-U52, 2009-U56, 2009-U62, 2009-U69, 2009-U91 & 2009-U140

2009 UF2	NEODyS	1315 Oct. 23	R E M O V E D
	JPL Sentry	1315 Oct. 23	R E M O V E D						Risk listing removed at 1029 UTC 23 Oct.
	Assessment postings were noted by A/CC on 19 Oct., 20 Oct., 21 Oct., 22 Oct. & 23 Oct. - References: MPECs 2009-U39, 2009-U50, 2009-U56, 2009-U62, 2009-U69, 2009-U91 & 2009-U112

2009 UD2	JPL Sentry	1501 Oct. 20	R E M O V E D						Risk listing removed at 1034 UTC 20 Oct.
	Assessment postings were noted by A/CC on 19 Oct. & 20 Oct. - References: MPECs 2009-U37, 2009-U50, 2009-U62, 2009-U69, 2009-U73, 2009-U91, 2009-U103 & 2009-U112

2009 UK	NEODyS	1327 Oct. 19	R E M O V E D
	JPL Sentry	1327 Oct. 19	R E M O V E D						Risk listing removed at 1034 UTC 19 Oct.
	Assessment postings were noted by A/CC on 17 Oct., 18 Oct. & 19 Oct. - References: MPECs 2009-U18, 2009-U26, 2009-U36, 2009-U50, 2009-U62, 2009-U103 & 2009-U112

2009 UE	JPL Sentry	2000 Oct. 20	R E M O V E D						Risk listing removed at 1951 UTC 20 Oct.
	NEODyS	1543 Oct. 18	R E M O V E D
	Assessment postings were noted by A/CC on 16 Oct., 17 Oct., 18 Oct. & 20 Oct. - References: MPECs 2009-U11, 2009-U26, 2009-U69 & 2009-U73

2009 UD	NEODyS	1543 Oct. 18	R E M O V E D
	JPL Sentry	1528 Oct. 17	R E M O V E D						Risk listing removed at 0933 UTC 17 Oct.
	Assessment postings were noted by A/CC on 16 Oct., 17 Oct. & 18 Oct. - References: MPECs 2009-U10, 2009-U15, 2009-U26, 2009-U36, 2009-U50, 2009-U56, 2009-U62 & 2009-U69

2009 UB	NEODyS	1327 Oct. 19	R E M O V E D
	JPL Sentry	1327 Oct. 19	R E M O V E D						Risk listing removed at 1047 UTC 19 Oct.
	Assessment postings were noted by A/CC on 16 Oct., 17 Oct. & 19 Oct. - References: MPECs 2009-U08 & 2009-U36

2009 TG10	JPL Sentry	1404 Oct. 22	R E M O V E D						Risk listing removed at 0949 UTC 22 Oct.
	Assessment postings were noted by A/CC on 21 Oct. & 22 Oct. - References: MPECs 2009-U06, 2009-U62, 2009-U69 & 2009-U103

2009 TE10	NEODyS	1501 Oct. 20	R E M O V E D
	JPL Sentry	1501 Oct. 20	R E M O V E D						Risk listing removed at 1035 UTC 20 Oct.
	Assessment postings were noted by A/CC on 16 Oct., 17 Oct., 18 Oct. & 20 Oct. - References: MPECs 2009-U04, 2009-U26 & 2009-U50

2009 TQ8	NEODyS	1501 Oct. 20	R E M O V E D
	JPL Sentry	1501 Oct. 20	R E M O V E D						Risk listing removed at 1035 UTC 20 Oct.
	Assessment postings were noted by A/CC on 15 Oct., 16 Oct., 19 Oct. & 20 Oct. - References: MPECs 2009-T69, 2009-U36, 2009-U50 & 2009-U56

2009 TO8	JPL Sentry	1501 Oct. 20	R E M O V E D						Risk listing removed at 1031 UTC 20 Oct.
	Assessment postings were noted by A/CC on 15 Oct. & 20 Oct. - References: MPECs 2009-T67, 2009-U26, 2009-U50, 2009-U56, 2009-U69, 2009-U73 & 2009-U140

2009 TG8	NEODyS	1327 Oct. 19	R E M O V E D
	JPL Sentry	1327 Oct. 19	R E M O V E D						Risk listing removed at 1029 UTC 19 Oct.
	Assessment postings were noted by A/CC on 15 Oct., 16 Oct. & 19 Oct. - References: MPECs 2009-T61, 2009-U36, 2009-U50 & 2009-U140

2009 TC8	JPL Sentry	1404 Oct. 22	R E M O V E D						Risk listing removed at 0949 UTC 22 Oct.
	NEODyS	1501 Oct. 20	R E M O V E D
	Assessment postings were noted by A/CC on 15 Oct., 16 Oct., 19 Oct., 20 Oct. & 22 Oct. - References: MPECs 2009-T58, 2009-U36, 2009-U50, 2009-U62, 2009-U73 & 2009-U91

2009 TS7	NEODyS	1501 Oct. 20	R E M O V E D
	JPL Sentry	1501 Oct. 20	R E M O V E D						Risk listing removed at 0951 UTC 20 Oct.
	Assessment postings were noted by A/CC on 15 Oct., 17 Oct. & 20 Oct. - References: MPECs 2009-T54, 2009-U15, 2009-U50, 2009-U62 & 2009-U91

2009 TB3	JPL Sentry	1528 Oct. 17	R E M O V E D						Risk listing removed at 0849 UTC 17 Oct.
	NEODyS	1401 Oct. 16	R E M O V E D
	Assessment postings were noted by A/CC on 13 Oct., 14 Oct., 15 Oct., 16 Oct. & 17 Oct. - References: MPECs 2009-T41, 2009-T49, 2009-T55, 2009-U01, 2009-U15, 2009-U26, 2009-U69, 2009-U73 & 2009-U125

2009 TT	NEODyS	1601 Oct. 12	R E M O V E D
	JPL Sentry	1601 Oct. 12	R E M O V E D						Risk listing removed at 0850 UTC 12 Oct.
	Assessment postings were noted by A/CC on 10 Oct., 11 Oct. & 12 Oct. - References: MPECs 2009-T33, 2009-T38, 2009-T40, 2009-T49, 2009-T55, 2009-U01, 2009-U15 & 2009-U50

2009 TJ	NEODyS	1407 Oct. 9	R E M O V E D
	JPL Sentry	1407 Oct. 9	R E M O V E D						Risk listing removed at 0850 UTC 9 Oct.
	Assessment postings were noted by A/CC on 8 Oct. & 9 Oct. - References: MPECs 2009-T23, 2009-T28, 2009-T29, 2009-T35 & 2009-T40

2009 SD229	JPL Sentry	1631 Oct. 10	R E M O V E D						Risk listing removed at 0849 UTC 10 Oct.
	NEODyS	0800 Oct. 10	R E M O V E D
	Assessment postings were noted by A/CC on 1 Oct. & 10 Oct. - References: MPECs 2009-T01, 2009-T29, 2009-T35, 2009-U15 & 2009-U124

2009 SC229	NEODyS	1521 Oct. 2	R E M O V E D
	JPL Sentry	1521 Oct. 2	R E M O V E D						Risk listing removed at 0849 UTC 2 Oct.
	Assessment postings were noted by A/CC on 1 Oct. & 2 Oct. - References: MPECs 2009-T01, 2009-T02, 2009-T05, 2009-T16, 2009-T28, 2009-U01, 2009-U36, 2009-U50 & 2009-U103

2009 SP171	NEODyS	1402 Oct. 1	R E M O V E D
	JPL Sentry	1402 Oct. 1	R E M O V E D						Risk listing removed at 0931 UTC 1 Oct.
	Assessment postings were noted by A/CC on 1 Oct. - References: MPECs 2009-T01, 2009-T02, 2009-T16, 2009-T28, 2009-T29, 2009-U01 & 2009-U124

2009 SK104	JPL Sentry	1631 Oct. 10	R E M O V E D						Risk listing removed at 0849 UTC 10 Oct.
	NEODyS	0800 Oct. 10	R E M O V E D
	Assessment postings were noted by A/CC on 1 Oct. & 10 Oct. - References: MPECs 2009-T01 & 2009-T29

2009 ST103	JPL Sentry	1402 Oct. 1	R E M O V E D						Risk listing removed at 0850 UTC 1 Oct.
	An assessment posting was noted by A/CC on 1 Oct. - References: MPECs 2009-T01, 2009-T02, 2009-T05, 2009-T15, 2009-T16, 2009-T24, 2009-T55, 2009-U36, 2009-U62 & 2009-U125

2009 SM98	NEODyS	1651 Oct. 11	R E M O V E D
	JPL Sentry	1651 Oct. 11	R E M O V E D						Risk listing removed at 0850 UTC 11 Oct.
	Assessment postings were noted by A/CC on 1 Oct., 10 Oct. & 11 Oct. - References: MPECs 2009-T01, 2009-T29, 2009-T35 & 2009-T40

2009 SG18	NEODyS	1521 Oct. 2	R E M O V E D
	JPL Sentry	1402 Oct. 1	R E M O V E D						Risk listing removed at 0850 UTC 1 Oct.
	Assessment postings were noted by A/CC on 1 Oct. & 2 Oct. - References: MPECs 2009-T01, 2009-T02, 2009-T15, 2009-T28, 2009-T49, 2009-U50 & 2009-U125

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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