Compiled at 2359 UTC on 31 July 2011
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| 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 OD18 | JPL Sentry | 1537 July 31 | 2034-2080 | 6 | 1.6e-07 | -7.54 | -7.96 | 0 | Analysis based on 10 observations spanning .09450 days (2011-Jul-31.05702 to 2011-Jul-31.15152). Diameter approximately 0.019 km. from mean, weighted H=26.3. |
| An assessment posting was noted by A/CC on 31 July - References: MPEC 2011-O71 | |||||||||
| 2011 AG5 | JPL Sentry | 1700 July 10 | 2040-2047 | 5 | 4.4e-04 | -1.67 | -1.68 | 1 | Analysis based on 181 observations spanning 182.21 days (2011-Jan-08.2673 to 2011-Jul-09.47379). Diameter approximately 0.140 km. from mean, weighted H=21.9. |
| NEODyS | 1530 July 10 | 2040-2047 | 6 | 1.26e-03 | -1.22 | -1.22 | 1 | Based on 181 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-07-09.475. | |
| Assessment postings were noted by A/CC on 2 July, 6 July, 8 July & 10 July - References: DOUs 2011-N07, 2011-N24, 2011-N32 & 2011-N38 | |||||||||
| C L E A R E D | |||||||||
| 2011 OY17 | JPL Sentry | 1537 July 31 | R E M O V E D | Risk listing removed at 0949 UTC 31 July | |||||
| Assessment postings were noted by A/CC on 30 July & 31 July - References: MPEC 2011-O67 plus DOU 2011-O69 | |||||||||
| 2011 MD5 | NEODyS | 1618 July 5 | R E M O V E D | ||||||
| JPL Sentry | 1618 July 5 | R E M O V E D | Risk listing removed at 0950 UTC 5 July | ||||||
| Assessment postings were noted by A/CC on 3 July & 5 July - References: MPEC 2011-N15 plus DOUs 2011-N21, 2011-N24, 2011-N32, 2011-O11 & 2011-O54 | |||||||||
| 2011 MO4 | NEODyS | 1645 July 3 | R E M O V E D | ||||||
| Assessment postings were noted by A/CC on 2 July & 3 July - References: MPEC 2011-N04 plus DOUs 2011-N18, 2011-N24, 2011-N27, 2011-N32, 2011-N39, 2011-N42, 2011-O01, 2011-O11, 2011-O26, 2011-O27, 2011-O30 & 2011-O58 | |||||||||
| 2011 MD | JPL Sentry | 2315 July 6 | R E M O V E D | ||||||
| NEODyS | 1618 July 5 | R E M O V E D | |||||||
| Assessment postings were noted by A/CC on 1 July, 2 July, 5 July & 6 July - References: DOUs 2011-N01, 2011-N07, 2011-N20 & 2011-N24 | |||||||||
| 2005 SP1 | JPL Sentry | 1620 July 22 | R E M O V E D | Risk listing removed at 1053 UTC 22 July | |||||
| An assessment posting was noted by A/CC on 22 July - References: DOU 2011-O22 | |||||||||
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.