A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During August 2009

Compiled at 2359 UTC on 31 August 2009

<< July 2009 CRT | CRT Archive Index | September 2009 CRT >>

[ Today's risk monitoring & other observing news | object risks cleared in August | 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 QB35NEODyS1552 Aug. 302017-2088131.65e-08-4.87-5.300Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/08/28.344 to 2009/08/29.072.
JPL Sentry0430 Aug. 302012-21082012.7e-07-3.74-4.230Analysis based on 13 observations spanning .72860 days (2009-Aug-28.34307 to 2009-Aug-29.07167). Diameter approximately 0.351 km. from mean, weighted H=19.9.
Assessment postings were noted by A/CC on 30 Aug.   -   References: MPEC 2009-Q78
2009 OW6NEODyS1305 Aug. 10208018.82e-06-5.51-5.510Based on 56 optical observations (of which 2 are rejected as outliers) from 2009/07/27.361 to 2009/08/09.536.
JPL Sentry1305 Aug. 102080-209929.0e-06-5.50-5.520Analysis based on 54 observations spanning 13.174 days (2009-Jul-27.36058 to 2009-Aug-09.534873). Diameter approximately 0.029 km. from mean, weighted H=25.3.
Assessment postings were noted by A/CC on 1 Aug., 2 Aug. & 10 Aug.   -   References: MPECs 2009-P03, 2009-P04 & 2009-P34
2004 BX159JPL Sentry0430 Aug. 302014-2100132.6e-09-4.27-4.640Analysis based on 8 observations spanning 3.0080 days (2004-Jan-20.317639 to 2004-Jan-23.32563). Diameter approximately 1.200 km. from mean, weighted H=17.2.
An assessment posting was noted by A/CC on 30 Aug.   -   References: no recent MPECs
1991 VGJPL Sentry2206 Aug. 9210114.4e-07-8.51-8.510Analysis based on 63 observations spanning 173.12 days (1991-Nov-06.32553 to 1992-Apr-27.44847). Diameter approximately 0.007 km. from mean, weighted H=28.4.
An assessment posting was noted by A/CC on 9 Aug.   -   References: no recent MPECs
C   L   E   A   R   E   D
2009 QF34NEODyS1552 Aug. 30R E M O V E D
JPL Sentry1552 Aug. 30R E M O V E DRisk listing removed at 0850 UTC 30 Aug.
Assessment postings were noted by A/CC on 28 Aug., 29 Aug. & 30 Aug.   -   References: MPECs 2009-Q62, 2009-Q80 & 2009-Q83
2009 QL8NEODyS1325 Aug. 24R E M O V E D
JPL Sentry1325 Aug. 24R E M O V E DRisk listing removed at 0850 UTC 24 Aug.
Assessment postings were noted by A/CC on 21 Aug., 23 Aug. & 24 Aug.   -   References: MPECs 2009-Q36, 2009-Q50, 2009-Q53, 2009-Q55, 2009-Q57, 2009-Q59, 2009-Q66 & 2009-Q80
2009 QZ6NEODyS1500 Aug. 23R E M O V E D
Assessment postings were noted by A/CC on 21 Aug. & 23 Aug.   -   References: MPECs 2009-Q33, 2009-Q50, 2009-Q53, 2009-Q54, 2009-Q55, 2009-Q57, 2009-Q80 & 2009-Q83
2009 QH6NEODyS1411 Aug. 21R E M O V E D
JPL Sentry1411 Aug. 21R E M O V E DRisk listing removed at 0853 UTC 21 Aug.
Assessment postings were noted by A/CC on 20 Aug. & 21 Aug.   -   References: MPECs 2009-Q28, 2009-Q31, 2009-Q37, 2009-Q50, 2009-Q54, 2009-Q55, 2009-Q57, 2009-Q80 & 2009-Q83
2009 QRNEODyS1458 Aug. 22R E M O V E D
Assessment postings were noted by A/CC on 18 Aug., 19 Aug., 20 Aug., 21 Aug. & 22 Aug.   -   References: MPECs 2009-Q09, 2009-Q23, 2009-Q31, 2009-Q37, 2009-Q42 & 2009-Q54
2009 PU1JPL Sentry1525 Aug. 16R E M O V E DRisk listing removed at 0850 UTC 16 Aug.
An assessment posting was noted by A/CC on 16 Aug.   -   References: MPECs 2009-Q01, 2009-Q02, 2009-Q06, 2009-Q13, 2009-Q50 & 2009-Q66

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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