A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During February 2009

Compiled at 2359 UTC on 28 February 2009

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[ Today's risk monitoring & other observing news | object risks cleared in February | 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 DB45	JPL Sentry	1730 Feb. 28	2023-2093	20	8.0e-09	-5.24	-5.91	0	Analysis based on 18 observations spanning 1.0439 days (2009-Feb-27.25736 to 2009-Feb-28.30131). Diameter approximately 0.450 km. from mean, weighted H=19.4.
	An assessment posting was noted by A/CC on 28 Feb. - References: MPEC 2009-D78

2009 DA45	JPL Sentry	1730 Feb. 28	2041-2081	5	3.2e-09	-7.39	-7.84	0	Analysis based on 21 observations spanning 1.1293 days (2009-Feb-27.16081 to 2009-Feb-28.29006). Diameter approximately 0.100 km. from mean, weighted H=22.7.
	An assessment posting was noted by A/CC on 28 Feb. - References: MPEC 2009-D77

2009 DV43	NEODyS	1600 Feb. 28	2019-2088	14	3.1e-08	-6.30	-6.54	0	Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/02/27.295 to 2009/02/27.883.
	JPL Sentry	2258 Feb. 27	2019-2093	17	4.7e-08	-6.21	-6.66	0	Analysis based on 23 observations spanning .58851 days (2009-Feb-27.29421 to 2009-Feb-27.88272). Diameter approximately 0.062 km. from mean, weighted H=23.7.
	Assessment postings were noted by A/CC on 27 Feb. & 28 Feb. - References: MPEC 2009-D75

2009 DT43	NEODyS	1600 Feb. 28	2044	1	3.45e-06	-6.10	-6.10	0	Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/02/27.416 to 2009/02/27.533.
	JPL Sentry	2204 Feb. 27	2044-2101	4	3.9e-06	-6.10	-6.13	0	Analysis based on 17 observations spanning .11758 days (2009-Feb-27.41498 to 2009-Feb-27.53256). Diameter approximately 0.015 km. from mean, weighted H=26.8.
	Assessment postings were noted by A/CC on 27 Feb. & 28 Feb. - References: MPEC 2009-D74

2009 DS43	NEODyS	1600 Feb. 28	2014-2090	51	4.09e-08	-6.91	-7.32	0	Based on 24 optical observations (of which 5 are rejected as outliers) from 2009/02/27.265 to 2009/02/27.464.
	JPL Sentry	1600 Feb. 28	2014-2107	39	9.6e-08	-6.59	-6.97	0	Analysis based on 19 observations spanning .19886 days (2009-Feb-27.26402 to 2009-Feb-27.46288). Diameter approximately 0.028 km. from mean, weighted H=25.4.
	Assessment postings were noted by A/CC on 27 Feb. & 28 Feb. - References: MPECs 2009-D73 & 2009-D76

2009 DC43	NEODyS	1600 Feb. 28	2012-2089	133	7.08e-08	-3.12	-3.87	0	Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/02/26.500 to 2009/02/27.500.
	JPL Sentry	1858 Feb. 27	2016-2108	121	7.3e-08	-3.35	-4.08	0	Analysis based on 33 observations spanning .99968 days (2009-Feb-26.49973 to 2009-Feb-27.49941). Diameter approximately 0.940 km. from mean, weighted H=17.8.
	Assessment postings were noted by A/CC on 27 Feb. & 28 Feb. - References: MPEC 2009-D72

2009 DZ42	NEODyS	1600 Feb. 28	2073-2077	2	5.28e-07	-3.84	-4.00	0	Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/02/28.145.
	JPL Sentry	1600 Feb. 28	2073-2106	3	6.5e-07	-3.72	-3.90	0	Analysis based on 42 observations spanning 2.0156 days (2009-Feb-26.12849 to 2009-Feb-28.14414). Diameter approximately 0.410 km. from mean, weighted H=19.6.
	Assessment postings were noted by A/CC on 27 Feb. & 28 Feb. - References: MPECs 2009-D69 & 2009-D76

2009 DV42	NEODyS	1508 Feb. 27	2015-2089	56	2.97e-08	-4.05	-4.48	0	Based on 22 optical observations (of which 0 are rejected as outliers) from 2009/02/26.423 to 2009/02/27.027.
	JPL Sentry	1508 Feb. 27	2015-2104	79	5.4e-08	-3.90	-4.46	0	Analysis based on 22 observations spanning .60486 days (2009-Feb-26.42181 to 2009-Feb-27.02667). Diameter approximately 0.642 km. from mean, weighted H=18.6.
	Assessment postings were noted by A/CC on 27 Feb. - References: MPECs 2009-D67 & 2009-D68

2009 CZ1	NEODyS	1524 Feb. 5	2058-2074	4	1.15e-06	-5.52	-5.70	0	Based on 22 optical observations (of which 0 are rejected as outliers) from 2009/02/03.387 to 2009/02/05.268.
	JPL Sentry	1523 Feb. 5	2058-2106	3	1.1e-06	-5.55	-5.72	0	Analysis based on 22 observations spanning 1.8816 days (2009-Feb-03.38609 to 2009-Feb-05.26765). Diameter approximately 0.044 km. from mean, weighted H=24.4.
	Assessment postings were noted by A/CC on 4 Feb. & 5 Feb. - References: MPECs 2009-C40 & 2009-C49

2009 BF58	NEODyS	1458 Feb. 26	2055-2090	40	1.86e-04	-5.12	-5.33	0	Based on 56 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/25.436.
	JPL Sentry	1458 Feb. 26	2055-2088	21	1.9e-04	-5.11	-5.32	0	Analysis based on 56 observations spanning 28.173 days (2009-Jan-28.26267 to 2009-Feb-25.43554). Diameter approximately 0.012 km. from mean, weighted H=27.2.
	Assessment postings were noted by A/CC on 31 Jan., 1 Feb., 3 Feb., 6 Feb., 12 Feb., 21 Feb., 23 Feb. & 26 Feb. - References: MPECs 2009-B90, 2009-C02, 2009-C20, 2009-C58, 2009-C78, 2009-D42, 2009-D53 & 2009-D65

2009 BR5	NEODyS	1528 Feb. 1	2059-2078	3	3.31e-07	-4.97	-5.17	0	Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/01/20.456 to 2009/01/31.311.
	JPL Sentry	1528 Feb. 1	2059-2078	3	3.1e-07	-5.00	-5.24	0	Analysis based on 34 observations spanning 10.855 days (2009-Jan-20.45513 to 2009-Jan-31.3098). Diameter approximately 0.130 km. from mean, weighted H=22.1.
	Assessment postings were noted by A/CC on 1 Feb. - References: MPEC 2009-C02
C L E A R E D
2009 DH39	JPL Sentry	1508 Feb. 27	R E M O V E D						Risk listing removed at 0951 UTC 27 Feb.
	Assessment postings were noted by A/CC on 25 Feb., 26 Feb. & 27 Feb. - References: MPECs 2009-D63, 2009-D65, 2009-D68 & 2009-D76

2009 DS10	NEODyS	1459 Feb. 24	R E M O V E D
	JPL Sentry	1459 Feb. 24	R E M O V E D						Risk listing removed at 0951 UTC 24 Feb.
	Assessment postings were noted by A/CC on 22 Feb., 23 Feb. & 24 Feb. - References: MPECs 2009-D49, 2009-D59 & 2009-D76

2009 DR3	JPL Sentry	1651 Feb. 22	R E M O V E D						Risk listing removed at 1031 UTC 22 Feb.
	NEODyS	1651 Feb. 22	R E M O V E D
	Assessment postings were noted by A/CC on 21 Feb. & 22 Feb. - References: MPECs 2009-D40, 2009-D42, 2009-D48, 2009-D53, 2009-D59, 2009-D60, 2009-D65 & 2009-D76

2009 DM1	NEODyS	1458 Feb. 26	R E M O V E D
	JPL Sentry	1458 Feb. 26	R E M O V E D						Risk listing removed at 0947 UTC 26 Feb.
	Assessment postings were noted by A/CC on 20 Feb., 21 Feb., 22 Feb., 24 Feb. & 26 Feb. - References: MPECs 2009-D36, 2009-D42, 2009-D48, 2009-D59, 2009-D65 & 2009-D68

2009 DF1	NEODyS	1559 Feb. 21	R E M O V E D
	JPL Sentry	1559 Feb. 21	R E M O V E D						Risk listing removed at 0949 UTC 21 Feb.
	Assessment postings were noted by A/CC on 20 Feb. & 21 Feb. - References: MPECs 2009-D33, 2009-D34, 2009-D42, 2009-D48, 2009-D53, 2009-D59, 2009-D68 & 2009-D76

2009 DE1	JPL Sentry	1514 Feb. 25	R E M O V E D						Risk listing removed at 0953 UTC 25 Feb.
	NEODyS	1559 Feb. 21	R E M O V E D
	Assessment postings were noted by A/CC on 20 Feb., 21 Feb. & 25 Feb. - References: MPECs 2009-D32, 2009-D42, 2009-D60 & 2009-D65

2009 DA1	NEODyS	1600 Feb. 28	R E M O V E D
	JPL Sentry	1458 Feb. 26	R E M O V E D						Risk listing removed at 0950 UTC 26 Feb.
	Assessment postings were noted by A/CC on 20 Feb., 22 Feb., 24 Feb., 25 Feb., 26 Feb. & 28 Feb. - References: MPECs 2009-D28, 2009-D48, 2009-D59, 2009-D60, 2009-D65 & 2009-D76

2009 CV5	JPL Sentry	1426 Feb. 19	R E M O V E D						Risk listing removed at 0951 UTC 19 Feb.
	NEODyS	1426 Feb. 19	R E M O V E D
	Assessment postings were noted by A/CC on 16 Feb. & 19 Feb. - References: MPECs 2009-D05, 2009-D22, 2009-D34, 2009-D48, 2009-D59 & 2009-D76

2009 CQ5	NEODyS	1528 Feb. 20	R E M O V E D
	JPL Sentry	1528 Feb. 20	R E M O V E D						Risk listing removed at 0951 UTC 20 Feb.
	Assessment postings were noted by A/CC on 16 Feb. & 20 Feb. - References: MPECs 2009-D01, 2009-D34, 2009-D42, 2009-D48 & 2009-D68

2009 CR4	JPL Sentry	1609 Feb. 14	R E M O V E D						Risk listing removed at 0951 UTC 14 Feb.
	Assessment postings were noted by A/CC on 13 Feb. & 14 Feb. - References: MPECs 2009-C82, 2009-C83, 2009-C84, 2009-D15, 2009-D18, 2009-D34, 2009-D48, 2009-D59, 2009-D65 & 2009-D68

2009 CC3	JPL Sentry	1420 Feb. 18	R E M O V E D						Risk listing removed at 0950 UTC 18 Feb.
	NEODyS	1828 Feb. 7	R E M O V E D
	Assessment postings were noted by A/CC on 5 Feb., 6 Feb., 7 Feb., 8 Feb. & 18 Feb. - References: MPECs 2009-C55, 2009-C58, 2009-C63, 2009-C64, 2009-D18, 2009-D22, 2009-D34 & 2009-D76

2009 CB3	NEODyS	1458 Feb. 26	R E M O V E D
	JPL Sentry	1458 Feb. 26	R E M O V E D						Risk listing removed at 1006 UTC 26 Feb.
	Assessment postings were noted by A/CC on 5 Feb., 6 Feb. & 26 Feb. - References: MPECs 2009-C54, 2009-C58 & 2009-D65

2009 CR2	JPL Sentry	1426 Feb. 19	R E M O V E D						Risk listing removed at 0949 UTC 19 Feb.
	NEODyS	1533 Feb. 16	R E M O V E D
	Assessment postings were noted by A/CC on 4 Feb., 5 Feb., 14 Feb., 15 Feb., 16 Feb. & 19 Feb. - References: MPECs 2009-C45, 2009-C83, 2009-C84, 2009-D07, 2009-D22, 2009-D48 & 2009-D53

2009 CD2	JPL Sentry	1558 Feb. 6	R E M O V E D						Risk listing removed at 1034 UTC 6 Feb.
	Assessment postings were noted by A/CC on 4 Feb. & 6 Feb. - References: MPECs 2009-C44 & 2009-C58

2009 CA2	NEODyS	1828 Feb. 7	R E M O V E D
	Assessment postings were noted by A/CC on 5 Feb. & 7 Feb. - References: MPECs 2009-C41, 2009-C63, 2009-C83, 2009-D18, 2009-D22, 2009-D42 & 2009-D59

2009 CZ	JPL Sentry	1523 Feb. 5	R E M O V E D						Risk listing removed at 0950 UTC 5 Feb.
	Assessment postings were noted by A/CC on 3 Feb. & 5 Feb. - References: MPECs 2009-C28, 2009-C49, 2009-C58, 2009-C68, 2009-C83, 2009-D15, 2009-D34 & 2009-D48

2009 CV	JPL Sentry	1532 Feb. 4	R E M O V E D						Risk listing removed at 0957 UTC 4 Feb.
	Assessment postings were noted by A/CC on 3 Feb. & 4 Feb. - References: MPECs 2009-C27, 2009-C30, 2009-C49, 2009-C58, 2009-C63, 2009-C68, 2009-C78, 2009-C81, 2009-C83, 2009-C84, 2009-D07, 2009-D15, 2009-D18, 2009-D22, 2009-D34, 2009-D48 & 2009-D76

2009 CT	JPL Sentry	1558 Feb. 6	R E M O V E D						Risk listing removed at 1037 UTC 6 Feb.
	NEODyS	1558 Feb. 6	R E M O V E D
	Assessment postings were noted by A/CC on 3 Feb., 4 Feb. & 6 Feb. - References: MPECs 2009-C25, 2009-C58, 2009-D18, 2009-D22 & 2009-D68

2009 CS	JPL Sentry	1558 Feb. 6	R E M O V E D						Risk listing removed at 1031 UTC 6 Feb.
	NEODyS	1558 Feb. 6	R E M O V E D
	Assessment postings were noted by A/CC on 3 Feb., 4 Feb. & 6 Feb. - References: MPECs 2009-C24, 2009-C58, 2009-C63, 2009-C84, 2009-D18, 2009-D22, 2009-D34, 2009-D48, 2009-D59 & 2009-D76

2009 BF81	JPL Sentry	1528 Feb. 20	R E M O V E D						Risk listing removed at 0950 UTC 20 Feb.
	NEODyS	1609 Feb. 14	R E M O V E D
	Assessment postings were noted by A/CC on 2 Feb., 3 Feb., 14 Feb. & 20 Feb. - References: MPECs 2009-C11, 2009-C20, 2009-C83, 2009-D34, 2009-D48 & 2009-D65

2009 BD81	JPL Sentry	1605 Feb. 10	R E M O V E D						Risk listing removed at 1549 UTC 10 Feb.
	NEODyS	1558 Feb. 6	R E M O V E D
	Assessment postings were noted by A/CC on 2 Feb., 3 Feb., 4 Feb., 6 Feb. & 10 Feb. - References: MPECs 2009-C09, 2009-C30, 2009-C58, 2009-C68, 2009-C84, 2009-D15, 2009-D22, 2009-D53 & 2009-D59

2009 BL71	JPL Sentry	1541 Feb. 8	R E M O V E D						Risk listing removed at 0955 UTC 8 Feb.
	NEODyS	1424 Feb. 2	R E M O V E D
	Assessment postings were noted by A/CC on 31 Jan., 2 Feb. & 8 Feb. - References: MPECs 2009-B89, 2009-B90, 2009-C05, 2009-C64, 2009-C84 & 2009-D60

2009 BJ58	JPL Sentry	1609 Feb. 14	R E M O V E D						Risk listing removed at 0953 UTC 14 Feb.
	NEODyS	1558 Feb. 6	R E M O V E D
	Assessment postings were noted by A/CC on 31 Jan., 1 Feb., 6 Feb. & 14 Feb. - References: MPECs 2009-C02, 2009-C58, 2009-C83, 2009-C84, 2009-D42 & 2009-D48

2009 BC58	JPL Sentry	1528 Feb. 1	R E M O V E D						Risk listing removed at 1028 UTC 1 Feb.
	NEODyS	1528 Feb. 1	R E M O V E D
	Assessment postings were noted by A/CC on 31 Jan. & 1 Feb. - References: MPECs 2009-C02, 2009-C30, 2009-C58, 2009-C83, 2009-C84, 2009-D48, 2009-D53 & 2009-D60

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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