A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During January 2009

Compiled at 2359 UTC on 31 January 2009

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

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

Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090, plus (since 22 Jan. 2009) 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 BL71	NEODyS	1636 Jan. 31	2065-2077	2	2.82e-10	-8.25	-8.27	0	Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/01/30.270 to 2009/01/30.992.
	JPL Sentry	1636 Jan. 31	2021-2108	88	2.4e-07	-5.12	-5.36	0	Analysis based on 19 observations spanning .72150 days (2009-Jan-30.26931 to 2009-Jan-30.99081). Diameter approximately 0.132 km. from mean, weighted H=22.0.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPECs 2009-B89 & 2009-B90

2009 BJ58	NEODyS	1636 Jan. 31	2011-2087	180	4.01e-07	-2.69	-3.45	0	Based on 36 optical observations (of which 0 are rejected as outliers) from 2009/01/29.140 to 2009/01/30.492.
	JPL Sentry	0154 Jan. 31	2014-2061	25	1.6e-07	-3.00	-3.33	0	Analysis based on 36 observations spanning 1.3518 days (2009-Jan-29.13966 to 2009-Jan-30.49147). Diameter approximately 0.541 km. from mean, weighted H=19.0.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPEC 2009-B80

2009 BF58	NEODyS	1636 Jan. 31	2057-2090	30	2.25e-04	-5.04	-5.39	0	Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/01/31.246.
	JPL Sentry	1636 Jan. 31	2055-2109	59	3.6e-04	-4.89	-5.37	0	Analysis based on 33 observations spanning 2.9829 days (2009-Jan-28.26267 to 2009-Jan-31.24561). Diameter approximately 0.012 km. from mean, weighted H=27.3.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPECs 2009-B77 & 2009-B90

2009 BC58	NEODyS	1636 Jan. 31	2019-2089	32	5.94e-08	-3.70	-4.31	0	Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/01/25.421 to 2009/01/30.388.
	JPL Sentry	0018 Jan. 31	2019-2106	25	4.7e-08	-3.79	-4.34	0	Analysis based on 25 observations spanning 4.9666 days (2009-Jan-25.4202 to 2009-Jan-30.38681). Diameter approximately 0.898 km. from mean, weighted H=17.9.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPEC 2009-B74

2009 BR5	NEODyS	1443 Jan. 30	2059-2081	8	2.02e-06	-4.13	-4.22	0	Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/29.348.
	JPL Sentry	1443 Jan. 30	2059-2078	6	1.9e-06	-4.16	-4.23	0	Analysis based on 31 observations spanning 8.8918 days (2009-Jan-20.45513 to 2009-Jan-29.34697). Diameter approximately 0.130 km. from mean, weighted H=22.1.
	Assessment postings were noted by A/CC on 21 Jan., 22 Jan., 24 Jan., 26 Jan., 27 Jan., 28 Jan., 29 Jan. & 30 Jan. - References: MPECs 2009-B36, 2009-B49, 2009-B53, 2009-B61, 2009-B65, 2009-B69 & 2009-B72

2009 BE	NEODyS	2149 Jan. 29	2037-2090	16	5.88e-04	-3.94	-4.18	0	Based on 86 optical observations (of which 5 are rejected as outliers) from 2009/01/16.362 to 2009/01/22.397.
	JPL Sentry	1421 Jan. 27	2061-2108	21	6.3e-04	-3.91	-4.17	0	Analysis based on 81 observations spanning 6.0351 days (2009-Jan-16.36105 to 2009-Jan-22.39616). Diameter approximately 0.020 km. from mean, weighted H=26.1.
	Assessment postings were noted by A/CC on 18 Jan., 19 Jan., 20 Jan., 21 Jan., 22 Jan., 23 Jan., 27 Jan. & 29 Jan. - References: MPECs 2009-B15, 2009-B18, 2009-B19, 2009-B20, 2009-B32, 2009-B45, 2009-B48 & 2009-B61

2009 BD	NEODyS	1425 Jan. 26 2009	2060-2088	17	6.55e-04	-5.11	-5.29	0	Based on 119 optical observations (of which 1 are rejected as outliers) from 2009/01/16.277 to 2009/01/26.029.
	JPL Sentry	1425 Jan. 26 2009	2060-2107	9	6.5e-04	-5.11	-5.29	0	Analysis based on 118 observations spanning 9.7514 days (2009-Jan-16.27641 to 2009-Jan-26.027773). Diameter approximately 0.007 km. from mean, weighted H=28.3.
	Assessment postings were noted by A/CC on 2009 18 Jan., 19 Jan., 20 Jan., 21 Jan., 22 Jan., 23 Jan., 24 Jan. & 26 Jan. - References: MPECs 2009-B14, 2009-B18, 2009-B19, 2009-B20, 2009-B32, 2009-B45, 2009-B48, 2009-B49 & 2009-B53

2008 YV32	NEODyS	1614 Jan. 11	2085-2090	5	8.91e-07	-6.98	-7.30	0	Based on 45 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/09.089.
	JPL Sentry	1614 Jan. 11	2085-2107	11	7.0e-06	-6.14	-6.80	0	Analysis based on 45 observations spanning 8.8674 days (2008-Dec-31.22029 to 2009-Jan-09.087737). Diameter approximately 0.018 km. from mean, weighted H=26.4.
	Assessment postings were noted by A/CC on 2 Jan., 3 Jan., 4 Jan., 7 Jan. & 11 Jan. - References: MPECs 2009-A08, 2009-A22, 2009-A30, 2009-A40 & 2009-A58

2008 YF29	NEODyS	1535 Jan. 9	2090	1	1.87e-07	-6.62	-6.62	0	Based on 46 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/08.344.
	JPL Sentry	1433 Jan. 4	R E M O V E D						Risk listing removed at 0950 UTC 4 Jan.
	Assessment postings were noted by A/CC on 2 Jan., 3 Jan., 4 Jan., 7 Jan. & 9 Jan. - References: MPECs 2009-A06, 2009-A22, 2009-A30, 2009-A40 & 2009-A49

2008 YC3	JPL Sentry	1425 Jan. 26	2088-2106	4	2.0e-08	-8.26	-8.34	0	Analysis based on 34 observations spanning 29.911 days (2008-Dec-22.25277 to 2009-Jan-21.16386). Diameter approximately 0.029 km. from mean, weighted H=25.4.
	NEODyS	1557 Jan. 18	R E M O V E D
	Assessment postings were noted by A/CC on 3 Jan., 18 Jan., 21 Jan., 22 Jan. & 26 Jan. - References: MPECs 2009-A22, 2009-B18 & 2009-B53

2008 YO2	JPL Sentry	2032 Jan. 1	2052-2107	39	6.8e-06	-5.31	-5.88	0	Analysis based on 26 observations spanning 1.0020 days (2008-Dec-21.16512 to 2008-Dec-22.16708). Diameter approximately 0.031 km. from mean, weighted H=25.2.
	NEODyS	1605 Jan. 1	2052-2089	7	2.1e-06	-5.78	-5.91	0	Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/12/21.166 to 2008/12/22.168.
	Assessment postings were noted by A/CC on 1 Jan. - References: MPEC 2009-A02

2008 XU2	NEODyS	1433 Jan. 4	2039	1	3.01e-07	-6.64	-6.64	0	Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2009/01/03.259.
	JPL Sentry	1433 Jan. 4	2039	1	2.9e-07	-6.65	-6.65	0	Analysis based on 44 observations spanning 27.997 days (2008-Dec-06.2616 to 2009-Jan-03.258608). Diameter approximately 0.026 km. from mean, weighted H=25.6.
	Assessment postings were noted by A/CC on 1 Jan. & 4 Jan. - References: MPECs 2009-A02 & 2009-A30

2008 TS10	NEODyS	1733 Jan. 18	2068-2089	6	9.12e-06	-7.22	-7.64	0	Based on 17 optical observations (of which 0 are rejected as outliers) from 2008/10/08.362 to 2008/10/22.499.
	JPL Sentry	0411 Jan. 15	2068-2103	17	4.3e-05	-6.63	-7.42	0	Analysis based on 17 observations spanning 14.137 days (2008-Oct-08.36174 to 2008-Oct-22.498735). Diameter approximately 0.006 km. from mean, weighted H=28.8.
	Assessment postings were noted by A/CC on 13 Jan., 14 Jan., 15 Jan. & 18 Jan. - References: MPEC 2009-A61

144898 2004 VD17	NEODyS	1532 Jan. 4	2102-2104	2	5.64e-08	-4.91	-4.91	0	Based on 974 optical observations (of which 4 are rejected as outliers) from 2002/02/16.463 to 2009/01/03.407.
144898 2004 VD17	An assessment posting was noted by A/CC on 4 Jan. - References: MPEC 2009-A30

99942 Apophis (2004 MN4)	NEODyS	1929 Jan. 22	2036-2083	10	2.16e-05	-2.59	-2.62	0	Based on 1000 optical observations (of which 5 are rejected as outliers) from 2004/03/15.108 to 2006/08/16.627, and also on seven radar data points on 2005/01/27, 2005/01/29, 2005/01/31, 2005/08/07 and 2006/05/06.
99942 Apophis (2004 MN4)	Assessment postings were noted by A/CC on 4 Jan., 5 Jan. & 22 Jan. - References: no recent MPECs

153814 2001 WN5	NEODyS	2050 Jan. 22	2106-2133	3	1.31e-05	-2.08	-2.08	0	Based on 120 optical observations (of which 7 are rejected as outliers) from 1996/02/10.397 to 2009/01/02.211.
	JPL Sentry	1929 Jan. 22	2133	1	1.1e-05	-2.13	-2.13	-	Analysis based on 116 observations spanning 4709.8 days (1996-Feb-10.39593 to 2009-Jan-02.21019). Diameter approximately 0.780 km. from mean, weighted H=18.2.
	Assessment postings were noted by A/CC on 22 Jan. - References: no recent MPECs

101955 1999 RQ36	NEODyS	2051 Jan. 22	2169-2199	8	7.12e-04	-1.12	-1.52	-	Based on 290 optical observations (of which 8 are rejected as outliers) from 1999/09/11.407 to 2006/05/26.200, and also on 13 radar data points from 1999/09/21 to 2005/10/02.
	JPL Sentry	1929 Jan. 22	2169-2199	8	7.1e-04	-1.12	-1.52	-	Analysis based on 9 radar delay, 4 Doppler, and 295 optical observations spanning 2448.8 days (1999-Sep-11.4 to 2006-May-26.2). Diameter approximately 0.560 km. from mean, weighted H=20.7.
	Assessment postings were noted by A/CC on 22 Jan. - References: no recent MPECs
C L E A R E D
2009 BU5	JPL Sentry	1550 Jan. 24	R E M O V E D						Risk listing removed at 0953 UTC 24 Jan.
	NEODyS	1550 Jan. 24	R E M O V E D
	Assessment postings were noted by A/CC on 21 Jan., 22 Jan. & 24 Jan. - References: MPECs 2009-B39, 2009-B49, 2009-B61 & 2009-B72

2009 BP5	JPL Sentry	1425 Jan. 26	R E M O V E D						Risk listing removed at 0952 UTC 26 Jan.
	NEODyS	1425 Jan. 26	R E M O V E D
	Assessment postings were noted by A/CC on 21 Jan., 22 Jan. & 26 Jan. - References: MPECs 2009-B34, 2009-B53, 2009-B61, 2009-B69 & 2009-B72

2009 BE2	JPL Sentry	1420 Jan. 22	R E M O V E D						Risk listing removed at 0952 UTC 22 Jan.
2009 BE2	Assessment postings were noted by A/CC on 20 Jan., 21 Jan. & 22 Jan. - References: MPECs 2009-B22, 2009-B45, 2009-B48, 2009-B53 & 2009-B72

2009 AM15	NEODyS	1410 Jan. 14	R E M O V E D
2009 AM15	Assessment postings were noted by A/CC on 9 Jan. & 14 Jan. - References: MPECs 2009-A47, 2009-A68, 2009-B01, 2009-B06, 2009-B19, 2009-B20 & 2009-B53

2009 AV	NEODyS	1535 Jan. 9	R E M O V E D
	JPL Sentry	1535 Jan. 9	R E M O V E D						Risk listing removed at 1051 UTC 9 Jan.
	Assessment postings were noted by A/CC on 3 Jan., 4 Jan. & 9 Jan. - References: MPECs 2009-A27, 2009-A49 & 2009-B65

2009 AL	JPL Sentry	1426 Jan. 29	R E M O V E D						Risk listing removed at 0949 UTC 29 Jan.
	NEODyS	1417 Jan. 28	R E M O V E D
	Assessment postings were noted by A/CC on 2 Jan., 3 Jan., 14 Jan., 15 Jan., 16 Jan., 17 Jan., 19 Jan., 20 Jan., 21 Jan., 22 Jan., 25 Jan., 28 Jan. & 29 Jan. - References: MPECs 2009-A14, 2009-A22, 2009-A68, 2009-A70, 2009-B01, 2009-B06, 2009-B19, 2009-B20, 2009-B51, 2009-B65 & 2009-B69

2008 YY32	JPL Sentry	1433 Jan. 4	R E M O V E D						Risk listing removed at 1030 UTC 4 Jan.
2008 YY32	Assessment postings were noted by A/CC on 2 Jan., 3 Jan. & 4 Jan. - References: MPECs 2009-A11, 2009-A22, 2009-A30 & 2009-B06

2008 YU32	JPL Sentry	0536 Jan. 22	R E M O V E D						Risk listing removed at 0954 UTC 16 Jan.
	NEODyS	1428 Jan. 16	R E M O V E D
	Assessment postings were noted by A/CC on 2 Jan., 3 Jan., 14 Jan., 15 Jan., 16 Jan., 21 Jan. & 22 Jan. - References: MPECs 2009-A07, 2009-A22, 2009-A68, 2009-A70, 2009-B01 & 2009-B20

2008 YU30	NEODyS	1556 Jan. 3	R E M O V E D
	JPL Sentry	1556 Jan. 3	R E M O V E D						Risk listing removed at 1138 UTC 3 Jan.
	Assessment postings were noted by A/CC on 1 Jan., 2 Jan. & 3 Jan. - References: MPECs 2009-A06, 2009-A22, 2009-A30, 2009-A44, 2009-A49, 2009-A57, 2009-B01, 2009-B06 & 2009-B61

2008 YT30	JPL Sentry	1357 Jan. 5	R E M O V E D						Risk listing removed at 0953 UTC 5 Jan.
	NEODyS	1556 Jan. 3	R E M O V E D
	Assessment postings were noted by A/CC on 1 Jan., 2 Jan., 3 Jan. & 5 Jan. - References: MPECs 2009-A06, 2009-A22, 2009-A31, 2009-A70, 2009-B01, 2009-B06, 2009-B20, 2009-B53 & 2009-B60

2008 YH30	JPL Sentry	2217 Jan. 2	R E M O V E D						Risk listing removed at 2205 UTC 2 Jan.
2008 YH30	An assessment posting was noted by A/CC on 2 Jan. - References: MPECs 2009-A06 & 2009-A22

2008 YF30	JPL Sentry	2217 Jan. 2	R E M O V E D						Risk listing removed at 2135 UTC 2 Jan.
	NEODyS	1414 Jan. 2	R E M O V E D
	Assessment postings were noted by A/CC on 1 Jan. & 2 Jan. - References: MPECs 2009-A06 & 2009-A22

2008 YE29	NEODyS	1556 Jan. 3	R E M O V E D
	JPL Sentry	1556 Jan. 3	R E M O V E D						Risk listing removed at 1129 UTC 3 Jan.
	Assessment postings were noted by A/CC on 2 Jan. & 3 Jan. - References: MPECs 2009-A06, 2009-A22, 2009-A30, 2009-A44, 2009-A58, 2009-A61, 2009-B06, 2009-B18, 2009-B19, 2009-B49, 2009-B61 & 2009-B72

2008 YB29	JPL Sentry	1959 Jan. 1	R E M O V E D						Risk listing removed at 1949 UTC 1 Jan.
2008 YB29	An assessment posting was noted by A/CC on 1 Jan. - References: MPECs 2009-A02, 2009-A06, 2009-A22, 2009-A44 & 2009-B45

2008 YA29	JPL Sentry	1959 Jan. 1	R E M O V E D						Risk listing removed at 1949 UTC 1 Jan.
	NEODyS	1604 Jan. 1	R E M O V E D
	An assessment posting was noted by A/CC on 1 Jan. - References: MPECs 2009-A02, 2009-A06, 2009-A22, 2009-A44, 2009-A49, 2009-B19 & 2009-B53

2007 RT9	JPL Sentry	0536 Jan. 22	R E M O V E D						Risk listing removed at 1853 UTC 16 Jan.
2007 RT9	Assessment postings were noted by A/CC on 16 Jan., 21 Jan. & 22 Jan. - References: MPEC 2009-B02

2005 YR3	NEODyS	1426 Jan. 29	R E M O V E D
	JPL Sentry	1426 Jan. 29	R E M O V E D						Risk listing removed at 0612 UTC 29 Jan.
	Assessment postings were noted by A/CC on 29 Jan. - References: MPECs 2009-B68 & 2009-B72

2004 XY130	JPL Sentry	2359 Jan. 28	R E M O V E D						Risk listing removed at 1200 UTC 29 Oct.
2004 XY130	An assessment posting was noted by A/CC on 28 Jan. - References: no recent MPECs

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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