A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted in the Last 28 Days

Compiled at 1548 UTC on 9 February 2010

[ The Tracking News | ephemerides | cleared ]

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

2010 CA	NEODyS	1548 Feb. 9	2019-2063	6	4.65e-05	-3.45	-3.46	0	Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/02/05.197 to 2010/02/08.173.
	JPL Sentry	1548 Feb. 9	2019-2028	4	4.5e-05	-3.46	-3.47	0	Analysis based on 28 observations spanning 2.9758 days (2010-Feb-05.19638 to 2010-Feb-08.172148). Diameter approximately 0.041 km. from mean, weighted H=24.6.
	Assessment postings were noted by A/CC on 6 Feb., 7 Feb., 8 Feb. & 9 Feb. - References: MPECs 2010-C16, 2010-C18, 2010-C22 & 2010-C24

2009 XO	NEODyS	1750 Jan. 17	2038-2083	2	3.56e-07	-4.16	-4.26	0	Based on 221 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/16.546.
	JPL Sentry	1750 Jan. 17	2038-2081	2	3.0e-07	-4.19	-4.26	0	Analysis based on 221 observations spanning 38.393 days (2009-Dec-09.152 to 2010-Jan-16.54518). Diameter approximately 0.270 km. from mean, weighted H=20.5.
	Assessment postings were noted by A/CC on 12 Jan., 13 Jan., 14 Jan., 15 Jan. & 17 Jan. - References: MPECs 2010-A60, 2010-A66, 2010-A74, 2010-A79 & 2010-B03

2009 WM1	NEODyS	1521 Jan. 25	2078	1	3.99e-09	-6.27	-6.27	0	Based on 84 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2010/01/24.561.
	JPL Sentry	1502 Jan. 25	2091	1	9.3e-08	-4.98	-4.98	0	Analysis based on 84 observations spanning 68.097 days (2009-Nov-17.4641 to 2010-Jan-24.5607). Diameter approximately 0.280 km. from mean, weighted H=20.4.
	Assessment postings were noted by A/CC on 25 Jan. - References: MPEC 2010-B39
C L E A R E D
2010 BU2	NEODyS	1637 Jan. 23	R E M O V E D
	JPL Sentry	1637 Jan. 23	R E M O V E D						Risk listing removed at 1049 UTC 23 Jan.
	Assessment postings were noted by A/CC on 22 Jan. & 23 Jan. - References: MPECs 2010-B29, 2010-B34, 2010-B37, 2010-B39, 2010-B42, 2010-B45, 2010-B56, 2010-B60, 2010-B68 & 2010-C01

2010 BL2	NEODyS	1637 Jan. 23	R E M O V E D
	JPL Sentry	1637 Jan. 23	R E M O V E D						Risk listing removed at 1052 UTC 23 Jan.
	Assessment postings were noted by A/CC on 20 Jan., 21 Jan. & 23 Jan. - References: MPECs 2010-B17, 2010-B26, 2010-B34, 2010-B37, 2010-B45, 2010-C03 & 2010-C15

2010 BB	JPL Sentry	1503 Jan. 18	R E M O V E D						Risk listing removed at 1040 UTC 18 Jan.
2010 BB	Assessment postings were noted by A/CC on 17 Jan. & 18 Jan. - References: MPECs 2010-B05, 2010-B07, 2010-C03, 2010-C05, 2010-C15 & 2010-C24

2010 AF40	NEODyS	1502 Jan. 15	R E M O V E D
	JPL Sentry	1502 Jan. 15	R E M O V E D						Risk listing removed at 1056 UTC 15 Jan.
	Assessment postings were noted by A/CC on 13 Jan., 14 Jan. & 15 Jan. - References: MPECs 2010-A68, 2010-A74, 2010-A79, 2010-B01, 2010-B07, 2010-B09, 2010-B14 & 2010-B56, radar: 25 Jan.

2010 AE30	JPL Sentry	1501 Jan. 12	R E M O V E D						Risk listing removed at 0951 UTC 12 Jan.
2010 AE30	An assessment posting was noted by A/CC on 12 Jan. - References: MPECs 2010-A60, 2010-A66, 2010-A74, 2010-A79, 2010-B01, 2010-B03 & 2010-B07

2005 UO	NEODyS	1505 Jan. 21	R E M O V E D
	JPL Sentry	1800 Jan. 20	R E M O V E D						Risk listing removed at 1703 UTC 20 Jan.
	Assessment postings were noted by A/CC on 20 Jan. & 21 Jan. - References: MPEC 2010-B15

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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