Compiled at 2358 UTC on 31 July 2009
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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 |
| 2009 OW6 | NEODyS | 1309 July 31 | 2074-2080 | 3 | 7.42e-06 | -5.55 | -5.58 | 0 | Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/07/27.361 to 2009/07/30.479. |
| JPL Sentry | 1309 July 31 | 2080 | 1 | 7.1e-06 | -5.57 | -5.57 | 0 | Analysis based on 34 observations spanning 3.1179 days (2009-Jul-27.36058 to 2009-Jul-30.47853). Diameter approximately 0.030 km. from mean, weighted H=25.2. | |
| Assessment postings were noted by A/CC on 28 July, 30 July & 31 July - References: MPECs 2009-O45, 2009-O50 & 2009-O55 | |||||||||
| 2009 MG1 | NEODyS | 1520 July 5 | 2079 | 1 | 7.91e-08 | -6.63 | -6.63 | 0 | Based on 20 optical observations (of which 0 are rejected as outliers) from 2009/06/21.273 to 2009/07/02.374. |
| JPL Sentry | 1520 July 5 | 2079 | 1 | 8.9e-08 | -6.58 | -6.58 | 0 | Analysis based on 20 observations spanning 11.101 days (2009-Jun-21.27223 to 2009-Jul-02.372809). Diameter approximately 0.052 km. from mean, weighted H=24.1. | |
| Assessment postings were noted by A/CC on 5 July - References: MPEC 2009-N11 | |||||||||
| C L E A R E D | |||||||||
| 2009 OF | NEODyS | 1534 July 26 | R E M O V E D | ||||||
| JPL Sentry | 1534 July 26 | R E M O V E D | Risk listing removed at 0850 UTC 26 July | ||||||
| Assessment postings were noted by A/CC on 18 July, 19 July, 20 July, 21 July, 22 July, 23 July, 24 July, 25 July & 26 July - References: MPECs 2009-O07, 2009-O15, 2009-O17, 2009-O20, 2009-O23, 2009-O26, 2009-O27, 2009-O30, 2009-O35, 2009-O37, 2009-O43, 2009-O46, 2009-O50 & 2009-O55 | |||||||||
| 2009 NA | JPL Sentry | 1442 July 3 | R E M O V E D | Risk listing removed at 0845 UTC 3 July | |||||
| Assessment postings were noted by A/CC on 2 July & 3 July - References: MPECs 2009-N06, 2009-N08, 2009-N09, 2009-N20, 2009-N21, 2009-N35, 2009-N39, 2009-O03, 2009-O20, 2009-O26, 2009-O27, 2009-O30, 2009-O37, 2009-O43 & 2009-O46 | |||||||||
| 2009 MB9 | NEODyS | 1441 July 11 | R E M O V E D | ||||||
| JPL Sentry | 1441 July 11 | R E M O V E D | Risk listing removed at 0850 UTC 11 July | ||||||
| Assessment postings were noted by A/CC on 1 July, 2 July, 5 July, 6 July, 8 July, 9 July, 10 July & 11 July - References: MPECs 2009-N05, 2009-N11, 2009-N12, 2009-N21, 2009-N28, 2009-N31, 2009-N35, 2009-N39, 2009-N48, 2009-O03, 2009-O15, 2009-O20, 2009-O27 & 2009-O46 | |||||||||
| 2009 LU2 | NEODyS | 1442 July 3 | R E M O V E D | ||||||
| JPL Sentry | 2121 July 2 | R E M O V E D | Risk listing removed at 2052 UTC 2 July | ||||||
| Assessment postings were noted by A/CC on 1 July, 2 July & 3 July - References: MPEC 2009-N08 | |||||||||
| 2008 ER7 | NEODyS | 1400 July 2 | R E M O V E D | ||||||
| JPL Sentry | 1400 July 2 | R E M O V E D | Risk listing removed at 0856 UTC 2 July | ||||||
| Assessment postings were noted by A/CC on 2 July - References: MPECs 2009-N05, 2009-N20, 2009-N44 & 2009-O06 | |||||||||
| 2000 QS7 | NEODyS | 1318 July 28 | R E M O V E D | ||||||
| JPL Sentry | 1318 July 28 | R E M O V E D | Risk listing removed at 0505 UTC 28 July | ||||||
| Assessment postings were noted by A/CC on 28 July - References: MPEC 2009-O42 | |||||||||
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.