A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During July 2009

Compiled at 2358 UTC on 31 July 2009

<< June 2009 CRT | CRT Archive Index | August 2009 CRT >>

[ Today's risk monitoring & other observing news | object risks cleared in July | Ephemerides for Active Risk-Rated Objects ]

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
2009 OW6NEODyS1309 July 312074-208037.42e-06-5.55-5.580Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/07/27.361 to 2009/07/30.479.
JPL Sentry1309 July 31208017.1e-06-5.57-5.570Analysis 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 MG1NEODyS1520 July 5207917.91e-08-6.63-6.630Based on 20 optical observations (of which 0 are rejected as outliers) from 2009/06/21.273 to 2009/07/02.374.
JPL Sentry1520 July 5207918.9e-08-6.58-6.580Analysis 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 OFNEODyS1534 July 26R E M O V E D
JPL Sentry1534 July 26R E M O V E DRisk 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 NAJPL Sentry1442 July 3R E M O V E DRisk 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 MB9NEODyS1441 July 11R E M O V E D
JPL Sentry1441 July 11R E M O V E DRisk 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 LU2NEODyS1442 July 3R E M O V E D
JPL Sentry2121 July 2R E M O V E DRisk 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 ER7NEODyS1400 July 2R E M O V E D
JPL Sentry1400 July 2R E M O V E DRisk 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 QS7NEODyS1318 July 28R E M O V E D
JPL Sentry1318 July 28R E M O V E DRisk 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.


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