A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During January 2011

Compiled at 2220 UTC on 31 January 2011

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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

2011 BH40	JPL Sentry	1614 Jan. 31	2022-2110	57	1.8e-07	-6.72	-7.26	0	Analysis based on 12 observations spanning .06577 days (2011-Jan-30.42363 to 2011-Jan-30.4894). Diameter approximately 0.034 km. from mean, weighted H=25.0.
2011 BH40	An assessment posting was noted by A/CC on 31 Jan. - References: MPEC 2011-B76

2011 BG40	JPL Sentry	1614 Jan. 31	2017-2047	12	2.5e-09	-7.93	-8.31	0	Analysis based on 6 observations spanning .94358 days (2011-Jan-30.40492 to 2011-Jan-31.348503). Diameter approximately 0.049 km. from mean, weighted H=24.2.
2011 BG40	An assessment posting was noted by A/CC on 31 Jan. - References: MPEC 2011-B75

2011 BF40	JPL Sentry	1614 Jan. 31	2035-2085	3	4.0e-10	-9.03	-9.38	0	Analysis based on 14 observations spanning .06708 days (2011-Jan-30.35537 to 2011-Jan-30.42245). Diameter approximately 0.046 km. from mean, weighted H=24.4.
2011 BF40	An assessment posting was noted by A/CC on 31 Jan. - References: MPEC 2011-B74

2011 BC40	NEODyS	1614 Jan. 31	2026-2074	10	8.89e-09	-5.30	-5.48	0	Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-01-30.201 to 2011-01-31.158.
	JPL Sentry	0711 Jan. 31	2026-2107	17	1.9e-08	-5.00	-5.27	0	Analysis based on 17 observations spanning .95685 days (2011-Jan-30.20006 to 2011-Jan-31.15691). Diameter approximately 0.341 km. from mean, weighted H=20.0.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPEC 2011-B71

2011 BH39	NEODyS	1615 Jan. 31	2016-2090	180	4.94e-07	-6.00	-6.57	0	Based on 21 optical observations (of which 0 are rejected as outliers) from 2011-01-30.224 to 2011-01-30.384.
	JPL Sentry	1614 Jan. 31	2014-2110	195	6.8e-07	-5.92	-6.53	0	Analysis based on 21 observations spanning .16019 days (2011-Jan-30.22278 to 2011-Jan-30.38297). Diameter approximately 0.028 km. from mean, weighted H=25.4.
	Assessment postings were noted by A/CC on 31 Jan. - References: MPEC 2011-B68 plus DOU 2011-B72

2011 BY24	NEODyS	1750 Jan. 30	2058-2087	8	1.14e-08	-6.54	-6.66	0	Based on 12 optical observations (of which 0 are rejected as outliers) from 2011-01-24.901 to 2011-01-29.537.
	JPL Sentry	1652 Jan. 29	2064-2093	5	7.5e-09	-6.69	-6.78	0	Analysis based on 12 observations spanning 4.6358 days (2011-Jan-24.90012 to 2011-Jan-29.53588). Diameter approximately 0.140 km. from mean, weighted H=21.9.
	Assessment postings were noted by A/CC on 29 Jan. & 30 Jan. - References: MPEC 2011-B64

2011 BN24	NEODyS	1750 Jan. 30	2013-2087	61	7.34e-08	-4.16	-4.84	0	Based on 14 optical observations (of which 0 are rejected as outliers) from 2011-01-28.307 to 2011-01-29.305.
	JPL Sentry	1750 Jan. 30	2014-2110	364	4.2e-07	-3.77	-4.67	0	Analysis based on 14 observations spanning .99843 days (2011-Jan-28.30613 to 2011-Jan-29.304563). Diameter approximately 0.244 km. from mean, weighted H=20.7.
	Assessment postings were noted by A/CC on 29 Jan. & 30 Jan. - References: MPEC 2011-B61 plus DOU 2011-B67

2011 BM24	NEODyS	1750 Jan. 30	2021-2066	6	2.9e-09	-5.00	-5.16	0	Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-01-28.265 to 2011-01-29.214.
2011 BM24	An assessment posting was noted by A/CC on 30 Jan. - References: MPEC 2011-B60

2011 BJ24	NEODyS	1615 Jan. 31	2043-2082	8	2.92e-09	-4.90	-5.3	0	Based on 51 optical observations (of which 0 are rejected as outliers) from 2011-01-28.114 to 2011-01-29.421.
	JPL Sentry	1614 Jan. 31	2043-2101	6	4.3e-09	-4.99	-5.43	0	Analysis based on 51 observations spanning 1.3070 days (2011-Jan-28.1131 to 2011-Jan-29.42014). Diameter approximately 0.985 km. from mean, weighted H=17.7.
	Assessment postings were noted by A/CC on 29 Jan., 30 Jan. & 31 Jan. - References: MPEC 2011-B57 plus DOUs 2011-B67 & 2011-B72

2011 BX18	NEODyS	1750 Jan. 30	2016-2090	92	5.59e-08	-3.36	-3.82	0	Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-01-26.311 to 2011-01-29.416.
	JPL Sentry	1750 Jan. 30	2030-2098	30	3.1e-08	-3.96	-4.79	0	Analysis based on 23 observations spanning 3.1046 days (2011-Jan-26.31025 to 2011-Jan-29.41482). Diameter approximately 0.837 km. from mean, weighted H=18.0.
	Assessment postings were noted by A/CC on 28 Jan., 29 Jan. & 30 Jan. - References: MPEC 2011-B48 plus DOU 2011-B67

2011 BT15	NEODyS	1652 Jan. 29	2027-2090	53	3.09e-05	-2.91	-3.27	0	Based on 22 optical observations (of which 1 are rejected as outliers) from 2011-01-24.290 to 2011-01-29.171.
	JPL Sentry	1652 Jan. 29	2027-2090	59	3.0e-05	-3.07	-3.61	0	Analysis based on 22 observations spanning 4.8809 days (2011-Jan-24.28933 to 2011-Jan-29.17021). Diameter approximately 0.146 km. from mean, weighted H=21.9.
	Assessment postings were noted by A/CC on 27 Jan., 28 Jan. & 29 Jan. - References: MPEC 2011-B43 plus DOUs 2011-B46 & 2011-B56

2011 BA12	JPL Sentry	1750 Jan. 30	2079-2110	9	7.6e-06	-4.25	-4.37	0	Analysis based on 41 observations spanning 4.1198 days (2011-Jan-25.1938 to 2011-Jan-29.313551). Diameter approximately 0.097 km. from mean, weighted H=22.7.
	NEODyS	1750 Jan. 30	2079-2079	1	5.3e-06	-4.36	-4.36	0	Based on 41 optical observations (of which 0 are rejected as outliers) from 2011-01-25.195 to 2011-01-29.314.
	Assessment postings were noted by A/CC on 26 Jan., 27 Jan., 28 Jan. & 30 Jan. - References: MPEC 2011-B40 plus DOUs 2011-B46 & 2011-B67

2011 BV11	NEODyS	1652 Jan. 29	R E M O V E D
	JPL Sentry	1652 Jan. 29	2096-2101	5	1.6e-08	-6.95	-7.03	0	Analysis based on 20 observations spanning 3.0666 days (2011-Jan-25.26063 to 2011-Jan-28.32725). Diameter approximately 0.074 km. from mean, weighted H=23.3.
	Assessment postings were noted by A/CC on 26 Jan., 27 Jan., 28 Jan. & 29 Jan. - References: MPEC 2011-B35 plus DOUs 2011-B44, 2011-B46 & 2011-B56

2011 BX10	JPL Sentry	1750 Jan. 30	2068-2106	2	1.5e-07	-4.03	-4.03	0	Analysis based on 51 observations spanning 5.6335 days (2011-Jan-24.13405 to 2011-Jan-29.76752). Diameter approximately 0.690 km. from mean, weighted H=18.4.
	NEODyS	1750 Jan. 30	R E M O V E D
	Assessment postings were noted by A/CC on 25 Jan., 26 Jan., 27 Jan., 28 Jan., 29 Jan. & 30 Jan. - References: MPEC 2011-B31 plus DOUs 2011-B34, 2011-B44, 2011-B46, 2011-B56 & 2011-B67

2011 BG10	NEODyS	1615 Jan. 31	2051-2074	4	4.56e-06	-5.87	-6.12	0	Based on 39 optical observations (of which 1 are rejected as outliers) from 2011-01-23.270 to 2011-01-30.521.
	JPL Sentry	1614 Jan. 31	2051-2074	4	1.6e-06	-6.32	-6.57	0	Analysis based on 39 observations spanning 7.2507 days (2011-Jan-23.26948 to 2011-Jan-30.52016). Diameter approximately 0.019 km. from mean, weighted H=26.3.
	Assessment postings were noted by A/CC on 23 Jan., 24 Jan., 26 Jan., 27 Jan., 28 Jan., 29 Jan., 30 Jan. & 31 Jan. - References: MPEC 2011-B24 plus DOUs 2011-B34, 2011-B44, 2011-B46, 2011-B56, 2011-B67 & 2011-B72

2011 AM37	NEODyS	1614 Jan. 15	2048-2090	90	9.43e-04	-5.48	-5.83	0	Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-01-13.331 to 2011-01-14.397.
2011 AM37	An assessment posting was noted by A/CC on 15 Jan. - References: MPEC 2011-A64

2011 AK37	JPL Sentry	1652 Jan. 29	2057-2097	2	1.3e-07	-7.15	-7.23	0	Analysis based on 25 observations spanning 15.151 days (2011-Jan-13.30429 to 2011-Jan-28.45538). Diameter approximately 0.031 km. from mean, weighted H=25.2.
2011 AK37	Assessment postings were noted by A/CC on 14 Jan., 28 Jan. & 29 Jan. - References: MPEC 2011-A62 plus DOUs 2011-B46 & 2011-B56

2011 AZ36	NEODyS	1556 Jan. 14	2042-2084	11	3.89e-08	-7.44	-8.24	0	Based on 9 optical observations (of which 0 are rejected as outliers) from 2011-01-13.281 to 2011-01-13.730.
	JPL Sentry	0100 Jan. 14	2017-2110	192	4.2e-07	-6.53	-7.87	0	Analysis based on 9 observations spanning .44921 days (2011-Jan-13.2805 to 2011-Jan-13.72971). Diameter approximately 0.032 km. from mean, weighted H=25.1.
	Assessment postings were noted by A/CC on 14 Jan. - References: MPEC 2011-A54

2011 AZ22	NEODyS	1550 Jan. 12	2077-2090	2	2.9e-08	-9.42	-9.67	0	Based on 16 optical observations (of which 0 are rejected as outliers) from 2011-01-11.357 to 2011-01-11.696.
	JPL Sentry	2329 Jan. 11	2034-2110	5	6.9e-07	-7.84	-8.02	0	Analysis based on 16 observations spanning .33881 days (2011-Jan-11.35594 to 2011-Jan-11.69475). Diameter approximately 0.006 km. from mean, weighted H=28.6.
	Assessment postings were noted by A/CC on 11 Jan. & 12 Jan. - References: MPEC 2011-A44

2011 AY22	NEODyS	1614 Jan. 15	2051-2086	9	2.2e-06	-6.75	-7.0	0	Based on 22 optical observations (of which 0 are rejected as outliers) from 2011-01-11.330 to 2011-01-12.164.
	JPL Sentry	1614 Jan. 15	2044-2109	23	1.8e-05	-5.96	-6.57	0	Analysis based on 22 observations spanning .83375 days (2011-Jan-11.32922 to 2011-Jan-12.16297). Diameter approximately 0.013 km. from mean, weighted H=27.1.
	Assessment postings were noted by A/CC on 11 Jan., 12 Jan. & 15 Jan. - References: MPEC 2011-A43 plus DOU 2011-A68

2011 AX22	JPL Sentry	1750 Jan. 30	2055-2101	14	1.2e-04	-3.80	-3.84	0	Analysis based on 60 observations spanning 18.981 days (2011-Jan-10.30552 to 2011-Jan-29.28644). Diameter approximately 0.039 km. from mean, weighted H=24.7.
	NEODyS	1750 Jan. 30	2055-2078	6	1.15e-04	-3.81	-3.85	0	Based on 60 optical observations (of which 0 are rejected as outliers) from 2011-01-10.306 to 2011-01-29.287.
	Assessment postings were noted by A/CC on 11 Jan., 12 Jan., 13 Jan., 15 Jan., 24 Jan., 27 Jan., 28 Jan. & 30 Jan. - References: MPEC 2011-A42 plus DOUs 2011-A48, 2011-A52, 2011-A68, 2011-B26, 2011-B44, 2011-B46 & 2011-B67

2011 AH5	NEODyS	1632 Jan. 13	2074-2083	2	1.98e-05	-5.35	-5.63	0	Based on 54 optical observations (of which 0 are rejected as outliers) from 2011-01-08.340 to 2011-01-12.554.
	JPL Sentry	1632 Jan. 13	2067-2109	5	2.0e-05	-5.37	-5.67	0	Analysis based on 54 observations spanning 4.2136 days (2011-Jan-08.33953 to 2011-Jan-12.55318). Diameter approximately 0.022 km. from mean, weighted H=25.9.
	Assessment postings were noted by A/CC on 9 Jan., 10 Jan., 11 Jan., 12 Jan. & 13 Jan. - References: MPEC 2011-A32 plus DOUs 2011-A37, 2011-A41, 2011-A48 & 2011-A52

2011 AG5	NEODyS	1614 Jan. 31	2036-2057	10	7.89e-05	-2.59	-2.77	0	Based on 81 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-01-29.835.
	JPL Sentry	1614 Jan. 31	2036-2057	8	8.0e-05	-2.58	-2.76	0	Analysis based on 81 observations spanning 21.567 days (2011-Jan-08.2673 to 2011-Jan-29.83405). Diameter approximately 0.140 km. from mean, weighted H=22.0.
	Assessment postings were noted by A/CC on 9 Jan., 10 Jan., 12 Jan., 13 Jan., 14 Jan., 22 Jan., 23 Jan., 25 Jan., 26 Jan., 27 Jan., 28 Jan., 29 Jan., 30 Jan. & 31 Jan. - References: MPEC 2011-A31 plus DOUs 2011-A37, 2011-A48, 2011-A52, 2011-A57, 2011-B20, 2011-B22, 2011-B33, 2011-B34, 2011-B44, 2011-B46, 2011-B56, 2011-B67 & 2011-B72

2011 AE3	NEODyS	2359 Jan. 5	2020-2090	141	1.13e-05	-6.33	-7.2	0	Based on 16 optical observations (of which 0 are rejected as outliers) from 2011-01-04.239 to 2011-01-04.282.
2011 AE3	An assessment posting was noted by A/CC on 5 Jan. - References: MPEC 2011-A17

2011 AD3	NEODyS	1551 Jan. 5	2032-2080	10	4.36e-09	-8.80	-9.1	0	Based on 12 optical observations (of which 0 are rejected as outliers) from 2011-01-04.231 to 2011-01-04.311.
	JPL Sentry	2359 Jan. 4	2013-2109	121	1.2e-07	-7.72	-8.78	0	Analysis based on 12 observations spanning .08044 days (2011-Jan-04.2298 to 2011-Jan-04.31024). Diameter approximately 0.016 km. from mean, weighted H=26.6.
	Assessment postings were noted by A/CC on 4 Jan. & 5 Jan. - References: MPEC 2011-A16

2010 YD	JPL Sentry	1625 Jan. 11	2052	1	4.5e-08	-8.12	-8.12	0	Analysis based on 44 observations spanning 10.136 days (2010-Dec-25.37287 to 2011-Jan-04.50918). Diameter approximately 0.016 km. from mean, weighted H=26.6.
	NEODyS	1551 Jan. 5	R E M O V E D
	Assessment postings were noted by A/CC on 3 Jan., 4 Jan., 5 Jan., 9 Jan. & 11 Jan. - References: DOUs 2011-A06, 2011-A09, 2011-A19, 2011-A33 & 2011-A41

2010 XW58	JPL Sentry	1750 Jan. 30	2069-2104	12	4.4e-06	-5.57	-6.03	0	Analysis based on 62 observations spanning 48.868 days (2010-Dec-11.47391 to 2011-Jan-29.3417). Diameter approximately 0.039 km. from mean, weighted H=24.7.
	NEODyS	1750 Jan. 30	2069-2089	3	9.34e-07	-6.12	-6.15	0	Based on 63 optical observations (of which 1 are rejected as outliers) from 2010-12-11.475 to 2011-01-29.342.
	Assessment postings were noted by A/CC on 3 Jan., 4 Jan., 5 Jan., 9 Jan., 10 Jan., 12 Jan., 13 Jan., 14 Jan., 27 Jan., 28 Jan., 29 Jan. & 30 Jan. - References: DOUs 2011-A06, 2011-A09, 2011-A19, 2011-A33, 2011-A37, 2011-A48, 2011-A52, 2011-A57, 2011-B44, 2011-B46, 2011-B56 & 2011-B67

2010 XC25	NEODyS	1614 Jan. 15	2050-2063	3	5.49e-06	-3.14	-3.16	0	Based on 99 optical observations (of which 2 are rejected as outliers) from 2010-12-08.378 to 2011-01-14.516.
	JPL Sentry	1614 Jan. 15	2050-2063	3	5.5e-06	-3.14	-3.16	0	Analysis based on 97 observations spanning 37.138 days (2010-Dec-08.37716 to 2011-Jan-14.51498). Diameter approximately 0.230 km. from mean, weighted H=20.9.
	Assessment postings were noted by A/CC on 2 Jan., 3 Jan., 4 Jan., 5 Jan., 8 Jan., 9 Jan., 10 Jan., 12 Jan., 13 Jan., 14 Jan. & 15 Jan. - References: DOUs 2011-A04, 2011-A06, 2011-A09, 2011-A19, 2011-A29, 2011-A33, 2011-A37, 2011-A48, 2011-A52, 2011-A57 & 2011-A68

2005 NX55	JPL Sentry	0542 Jan. 7	2013-2102	86	3.0e-08	-5.05	-5.41	0	Analysis based on 14 observations spanning 1.1343 days (2005-Jul-11.16281 to 2005-Jul-12.297115). Diameter approximately 0.140 km. from mean, weighted H=21.9.
2005 NX55	An assessment posting was noted by A/CC on 7 Jan. - References: no recent MPECs
C L E A R E D
2011 BF39	NEODyS	1614 Jan. 31	R E M O V E D
	JPL Sentry	1614 Jan. 31	R E M O V E D						Risk listing removed at 1050 UTC 31 Jan.
	Assessment postings were noted by A/CC on 30 Jan. & 31 Jan. - References: MPEC 2011-B66 plus DOU 2011-B72

2011 BO24	JPL Sentry	1750 Jan. 30	R E M O V E D						Risk listing removed at 1457 UTC 30 Jan.
2011 BO24	Assessment postings were noted by A/CC on 29 Jan. & 30 Jan. - References: MPEC 2011-B62 plus DOU 2011-B67

2011 BF24	JPL Sentry	1750 Jan. 30	R E M O V E D						Risk listing removed at 1537 UTC 30 Jan.
	NEODyS	1750 Jan. 30	R E M O V E D
	Assessment postings were noted by A/CC on 29 Jan. & 30 Jan. - References: MPEC 2011-B54 plus DOU 2011-B67

2011 BY18	JPL Sentry	1750 Jan. 30	R E M O V E D						Risk listing removed at 1323 UTC 30 Jan.
	NEODyS	1750 Jan. 30	R E M O V E D
	Assessment postings were noted by A/CC on 28 Jan., 29 Jan. & 30 Jan. - References: MPEC 2011-B49 plus DOUs 2011-B56 & 2011-B67

2011 BW18	NEODyS	1614 Jan. 31	R E M O V E D
	JPL Sentry	1614 Jan. 31	R E M O V E D						Risk listing removed at 1129 UTC 31 Jan.
	Assessment postings were noted by A/CC on 28 Jan., 29 Jan. & 31 Jan. - References: MPEC 2011-B47 plus DOU 2011-B72

2011 BZ11	JPL Sentry	1700 Jan. 27	R E M O V E D						Risk listing removed at 1134 UTC 27 Jan.
2011 BZ11	An assessment posting was noted by A/CC on 27 Jan. - References: MPEC 2011-B39 plus DOU 2011-B44

2011 BW11	NEODyS	1544 Jan. 28	R E M O V E D
	JPL Sentry	1544 Jan. 28	R E M O V E D						Risk listing removed at 1242 UTC 28 Jan.
	Assessment postings were noted by A/CC on 26 Jan., 27 Jan. & 28 Jan. - References: MPEC 2011-B36 plus DOU 2011-B46

2011 BY10	JPL Sentry	1717 Jan. 26	R E M O V E D						Risk listing removed at 1135 UTC 26 Jan.
2011 BY10	Assessment postings were noted by A/CC on 25 Jan. & 26 Jan. - References: MPEC 2011-B32 plus DOUs 2011-B34 & 2011-B46

2011 BV10	NEODyS	1717 Jan. 26	R E M O V E D
	JPL Sentry	1717 Jan. 26	R E M O V E D						Risk listing removed at 1216 UTC 26 Jan.
	Assessment postings were noted by A/CC on 25 Jan. & 26 Jan. - References: MPEC 2011-B29 plus DOUs 2011-B34, 2011-B44, 2011-B56, 2011-B67 & 2011-B72

2011 BH10	NEODyS	1717 Jan. 26	R E M O V E D
	JPL Sentry	1717 Jan. 26	R E M O V E D						Risk listing removed at 1136 UTC 26 Jan.
	Assessment postings were noted by A/CC on 24 Jan. & 26 Jan. - References: MPEC 2011-B25 plus DOU 2011-B34

2011 AN52	NEODyS	1605 Jan. 17	R E M O V E D
	JPL Sentry	1605 Jan. 17	R E M O V E D						Risk listing removed at 1053 UTC 17 Jan.
	Assessment postings were noted by A/CC on 15 Jan., 16 Jan. & 17 Jan. - References: MPEC 2011-A71 plus DOUs 2011-B04 & 2011-B09

2011 AL52	NEODyS	1717 Jan. 26	R E M O V E D
	JPL Sentry	1717 Jan. 26	R E M O V E D						Risk listing removed at 1214 UTC 26 Jan.
	Assessment postings were noted by A/CC on 16 Jan., 24 Jan., 25 Jan. & 26 Jan. - References: MPEC 2011-A69 plus DOUs 2011-B01, 2011-B26, 2011-B33 & 2011-B34

2011 AL37	JPL Sentry	1732 Jan. 18	R E M O V E D						Risk listing removed at 1053 UTC 18 Jan.
2011 AL37	Assessment postings were noted by A/CC on 14 Jan. & 18 Jan. - References: MPEC 2011-A63 plus DOUs 2011-B09, 2011-B11, 2011-B22, 2011-B26, 2011-B33, 2011-B34 & 2011-B44

2011 AH37	NEODyS	1700 Jan. 27	R E M O V E D
2011 AH37	Assessment postings were noted by A/CC on 15 Jan. & 27 Jan. - References: MPEC 2011-A60 plus DOUs 2011-B44 & 2011-B56

2011 AA37	JPL Sentry	1700 Jan. 27	R E M O V E D						Risk listing removed at 1216 UTC 27 Jan.
	NEODyS	1614 Jan. 15	R E M O V E D
	Assessment postings were noted by A/CC on 14 Jan., 15 Jan. & 27 Jan. - References: MPEC 2011-A55 plus DOUs 2011-A68, 2011-B44, 2011-B46 & 2011-B67

2011 AT26	JPL Sentry	1555 Jan. 14	R E M O V E D						Risk listing removed at 1052 UTC 14 Jan.
	NEODyS	1555 Jan. 14	R E M O V E D
	Assessment postings were noted by A/CC on 13 Jan. & 14 Jan. - References: MPEC 2011-A53 plus DOUs 2011-A52, 2011-A57 & 2011-B56

2011 AM24	JPL Sentry	1627 Jan. 23	R E M O V E D						Risk listing removed at 1051 UTC 23 Jan.
	NEODyS	1732 Jan. 18	R E M O V E D
	Assessment postings were noted by A/CC on 12 Jan., 13 Jan., 14 Jan., 18 Jan. & 23 Jan. - References: MPEC 2011-A49 plus DOUs 2011-A57, 2011-B09, 2011-B22, 2011-B33, 2011-B34, 2011-B46, 2011-B56, 2011-B67 & 2011-B72

2011 AA23	NEODyS	1632 Jan. 13	R E M O V E D
	JPL Sentry	1632 Jan. 13	R E M O V E D						Risk listing removed at 1257 UTC 13 Jan.
	Assessment postings were noted by A/CC on 11 Jan., 12 Jan. & 13 Jan. - References: MPEC 2011-A45 plus DOUs 2011-A52, 2011-A57 & 2011-B20

2011 AM12	NEODyS	1655 Jan. 22	R E M O V E D
	JPL Sentry	1655 Jan. 22	R E M O V E D						Risk listing removed at 1051 UTC 22 Jan.
	Assessment postings were noted by A/CC on 10 Jan., 12 Jan., 13 Jan., 14 Jan. & 22 Jan. - References: MPEC 2011-A36 plus DOUs 2011-A48, 2011-A52, 2011-A57, 2011-B20, 2011-B26, 2011-B44 & 2011-B56

2011 AL5	NEODyS	1550 Jan. 12	R E M O V E D
	JPL Sentry	1550 Jan. 12	R E M O V E D						Risk listing removed at 1133 UTC 12 Jan.
	Assessment postings were noted by A/CC on 9 Jan., 10 Jan. & 12 Jan. - References: MPEC 2011-A35 plus DOUs 2011-A48, 2011-A52, 2011-B44, 2011-B46 & 2011-B67

2011 AH3	NEODyS	1714 Jan. 9	R E M O V E D
	JPL Sentry	1714 Jan. 9	R E M O V E D						Risk listing removed at 1130 UTC 9 Jan.
	Assessment postings were noted by A/CC on 5 Jan., 6 Jan. & 9 Jan. - References: MPEC 2011-A22 plus DOUs 2011-A33, 2011-A37 & 2011-A52

2010 UE51	JPL Sentry	1614 Jan. 31	R E M O V E D						Risk listing removed at 1143 UTC 31 Jan.
2010 UE51	Assessment postings were noted by A/CC on 10 Jan. & 31 Jan. - References: DOUs 2011-A37 & 2011-B72

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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