A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During December 2007

Compiled at 2359 UTC on 31 December 2007


<< November 2007 CRT | CRT Archive Index | January 2008 CRT >>

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Something missing? Here are 99942 Apophis (2004 MN4) and 144898 2004 VD17. Check the archives for others.

Note that the time horizon for JPL is 100 years from today and for NEODyS is now usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, 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
2007 YB2NEODyS1453 Dec. 31204314.97e-08-3.82-3.820Based on 55 optical observations (of which 0 are rejected as outliers) from 2007/12/18.346 to 2007/12/31.081.
JPL Sentry1452 Dec. 312043-209824.8e-08-3.84-3.860Analysis based on 55 observations spanning 12.735 days (2007-Dec-18.34552 to 2007-Dec-31.08035). Diameter approximately 0.770 km. from mean, weighted H=18.2.
Assessment postings were noted by A/CC on 19 Dec., 20 Dec., 21 Dec., 26 Dec., 27 Dec., 29 Dec. & 31 Dec.   -   References: MPEC 2007-Y32 plus DOUs 2007-Y33, 2007-Y40, 2007-Y49, 2007-Y50, 2007-Y52 & 2007-Y60
2007 YH1NEODyS1440 Dec. 192024-205952.85e-09-7.98-8.350Based on 11 optical observations (of which 0 are rejected as outliers) from 2007/12/17.434 to 2007/12/18.338.
JPL Sentry0228 Dec. 192024-2079121.1e-08-7.69-8.310Analysis based on 11 observations spanning .90366 days (2007-Dec-17.43343 to 2007-Dec-18.33709). Diameter approximately 0.041 km. from mean, weighted H=24.6.
Assessment postings were noted by A/CC on 19 Dec.   -   References: MPEC 2007-Y25
2007 YG1NEODyS1451 Dec. 31R E M O V E D
JPL Sentry1440 Dec. 192019-204723.2e-10-5.30-5.510Analysis based on 21 observations spanning 2.0744 days (2007-Dec-16.45543 to 2007-Dec-18.52985). Diameter approximately 1.200 km. from mean, weighted H=17.3.
Assessment postings were noted by A/CC on 18 Dec., 19 Dec. & 31 Dec.   -   References: MPEC 2007-Y24 plus DOU 2007-Y30
2007 YMNEODyS1604 Dec. 182011-2089901.1e-05-5.09-5.870Based on 12 optical observations (of which 0 are rejected as outliers) from 2007/12/17.397 to 2007/12/17.525.
JPL Sentry0158 Dec. 182010-21061223.9e-06-5.83-6.420Analysis based on 12 observations spanning .12805 days (2007-Dec-17.39661 to 2007-Dec-17.52466). Diameter approximately 0.020 km. from mean, weighted H=26.1.
Assessment postings were noted by A/CC on 18 Dec.   -   References: MPEC 2007-Y18
2007 XB23JPL Sentry0146 Dec. 192078-208726.6e-07-7.56-7.810Analysis based on 10 observations spanning .91734 days (2007-Dec-14.56193 to 2007-Dec-15.47927). Diameter approximately 0.013 km. from mean, weighted H=27.1.
NEODyS1501 Dec. 162069-208634.21e-08-8.77-9.080Based on 10 optical observations (of which 0 are rejected as outliers) from 2007/12/14.563 to 2007/12/15.480.
Assessment postings were noted by A/CC on 16 Dec. & 19 Dec.   -   References: MPEC 2007-X61
2007 XZ9NEODyS1604 Dec. 182056-208941.52e-06-5.78-5.960Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/12/04.195 to 2007/12/18.184.
JPL Sentry1446 Dec. 182056-208951.6e-06-5.75-5.940Analysis based on 41 observations spanning 13.990 days (2007-Dec-04.19408 to 2007-Dec-18.18365). Diameter approximately 0.037 km. from mean, weighted H=24.8.
Assessment postings were noted by A/CC on 6 Dec., 7 Dec., 9 Dec., 12 Dec., 17 Dec. & 18 Dec.   -   References: MPEC 2007-X28 plus DOUs 2007-X34, 2007-X39, 2007-X53, 2007-Y05 & 2007-Y21
2007 WT3JPL Sentry1504 Dec. 1210116.9e-08-6.78-6.780Analysis based on 18 observations spanning 11.879 days (2007-Nov-18.29804 to 2007-Nov-30.177151). Diameter approximately 0.051 km. from mean, weighted H=24.1.
Assessment postings were noted by A/CC on 1 Dec.   -   References: DOU 2007-X04
2007 WP3JPL Sentry1401 Dec. 162098-210585.4e-06-4.81-5.160Analysis based on 60 observations spanning 26.940 days (2007-Nov-18.26457 to 2007-Dec-15.20424). Diameter approximately 0.066 km. from mean, weighted H=23.5.
Assessment postings were noted by A/CC on 30 Nov., 2 Dec., 3 Dec., 4 Dec., 6 Dec. & 16 Dec.   -   References: DOUs 2007-X07, 2007-X08, 2007-X15, 2007-X19, 2007-X26 & 2007-Y02
2007 VK184JPL Sentry2259 Dec. 182048-205743.3e-04-1.85-1.851Analysis based on 95 observations spanning 35.987 days (2007-Nov-12.13904 to 2007-Dec-18.1258). Diameter approximately 0.130 km. from mean, weighted H=22.0.
NEODyS1446 Dec. 182048-205733.22e-04-1.86-1.871Based on 96 optical observations (of which 1 are rejected as outliers) from 2007/11/12.140 to 2007/12/18.134.
Assessment postings were noted by A/CC on 2 Dec., 3 Dec., 4 Dec., 5 Dec., 7 Dec., 16 Dec., 17 Dec. & 18 Dec.   -   References: DOUs 2007-X07, 2007-X08, 2007-X15, 2007-X19, 2007-X34, 2007-Y02 & 2007-Y21
C   L   E   A   R   E   D
2007 YV29JPL Sentry1454 Dec. 30R E M O V E DRisk listing removed at 1122 UTC 30 Dec.
Assessment postings were noted by A/CC on 29 Dec. & 30 Dec.   -   References: MPEC 2007-Y53 plus DOU 2007-Y54
2007 YN1NEODyS1408 Dec. 20R E M O V E D
Assessment postings were noted by A/CC on 19 Dec. & 20 Dec.   -   References: MPEC 2007-Y29 plus DOUs 2007-Y30, 2007-Y33, 2007-Y40, 2007-Y52 & 2007-Y54
2007 YZJPL Sentry1525 Dec. 18R E M O V E DRisk listing removed at 1512 UTC 18 Dec.
Assessment postings were noted by A/CC on 18 Dec.   -   References: MPEC 2007-Y20 plus DOUs 2007-Y21, 2007-Y30, 2007-Y33, 2007-Y40, 2007-Y41, 2007-Y42, 2007-Y43, 2007-Y48, 2007-Y50, 2007-Y51, 2007-Y52, 2007-Y54 & 2007-Y60
2007 YJJPL Sentry1446 Dec. 18R E M O V E DRisk listing removed at 1424 UTC 18 Dec.
Assessment postings were noted by A/CC on 18 Dec.   -   References: MPEC 2007-Y16 plus DOUs 2007-Y21 & 2007-Y52
2007 YGJPL Sentry1820 Dec. 18R E M O V E DRisk listing removed at 1803 UTC 18 Dec.
Assessment postings were noted by A/CC on 17 Dec. & 18 Dec.   -   References: MPEC 2007-Y14 plus DOUs 2007-Y21, 2007-Y33, 2007-Y40 & 2007-Y60
2007 YFJPL Sentry1408 Dec. 20R E M O V E DRisk listing removed at 1325 UTC 20 Dec.
Assessment postings were noted by A/CC on 17 Dec. & 20 Dec.   -   References: MPEC 2007-Y13 plus DOUs 2007-Y33 & 2007-Y52
2007 XF25JPL Sentry1440 Dec. 19R E M O V E DRisk listing removed at 1054 UTC 19 Dec.
NEODyS1440 Dec. 19R E M O V E D
Assessment postings were noted by A/CC on 18 Dec. & 19 Dec.   -   References: MPEC 2007-Y19 plus DOUs 2007-Y30, 2007-Y33 & 2007-Y49
2007 XF18JPL Sentry1446 Dec. 18R E M O V E DRisk listing removed at 1341 UTC 18 Dec.
NEODyS1400 Dec. 15R E M O V E D
Assessment postings were noted by A/CC on 13 Dec., 14 Dec., 15 Dec., 17 Dec. & 18 Dec.   -   References: MPEC 2007-X55 plus DOUs 2007-X59, 2007-Y05, 2007-Y21 & 2007-Y30
2007 XN16JPL Sentry1356 Dec. 12R E M O V E DRisk listing removed at 1126 UTC 12 Dec.
Assessment postings were noted by A/CC on 11 Dec. & 12 Dec.   -   References: MPEC 2007-X52 plus DOUs 2007-X53, 2007-X54 & 2007-Y54
2007 XJ16NEODyS1604 Dec. 18R E M O V E D
JPL Sentry1446 Dec. 18R E M O V E DRisk listing removed at 1251 UTC 18 Dec.
Assessment postings were noted by A/CC on 10 Dec., 11 Dec., 16 Dec. & 18 Dec.   -   References: MPEC 2007-X50 plus DOUs 2007-Y02, 2007-Y21, 2007-Y40, 2007-Y52 & 2007-Y54
2007 XK11JPL Sentry1452 Dec. 31R E M O V E DRisk listing removed at 1121 UTC 31 Dec.
NEODyS1437 Dec. 26R E M O V E D
Assessment postings were noted by A/CC on 7 Dec., 8 Dec., 11 Dec., 14 Dec., 15 Dec., 16 Dec., 18 Dec., 19 Dec., 20 Dec., 26 Dec., 28 Dec., 29 Dec., 30 Dec. & 31 Dec.   -   References: MPEC 2007-X35 plus DOUs 2007-X38, 2007-X51, 2007-X56, 2007-X59, 2007-Y02, 2007-Y21, 2007-Y30, 2007-Y33, 2007-Y49, 2007-Y51, 2007-Y52, 2007-Y54 & 2007-Y60
2007 XD10JPL Sentry1350 Dec. 11R E M O V E DRisk listing removed at 1103 UTC 11 Dec.
NEODyS1350 Dec. 11R E M O V E D
Assessment postings were noted by A/CC on 6 Dec., 7 Dec. & 11 Dec.   -   References: MPEC 2007-X32 plus DOUs 2007-X34, 2007-X51, 2007-Y02, 2007-Y30, 2007-Y40 & 2007-Y52
2007 XB10JPL Sentry1446 Dec. 18R E M O V E DRisk listing removed at 1214 UTC 18 Dec.
NEODyS1446 Dec. 18R E M O V E D
Assessment postings were noted by A/CC on 7 Dec., 11 Dec., 16 Dec. & 18 Dec.   -   References: MPEC 2007-X30 plus DOUs 2007-X51, 2007-Y02, 2007-Y21, 2007-Y30, 2007-Y33 & 2007-Y52
2007 XP3JPL Sentry1759 Dec. 18R E M O V E DRisk listing removed at 1728 UTC 18 Dec.
NEODyS1446 Dec. 18R E M O V E D
Assessment postings were noted by A/CC on 7 Dec., 8 Dec., 9 Dec., 12 Dec., 16 Dec. & 18 Dec.   -   References: MPEC 2007-X22 plus DOUs 2007-X26, 2007-X39, 2007-X53, 2007-Y02, 2007-Y21, 2007-Y30, 2007-Y40 & 2007-Y52
2007 WE55JPL Sentry1504 Dec. 1R E M O V E DRisk listing removed at 1129 UTC 1 Dec.
Assessment postings were noted by A/CC on 1 Dec.   -   References: MPEC 2007-X02 plus DOUs 2007-X04, 2007-X07, 2007-X08, 2007-X26, 2007-X38, 2007-Y05 & 2007-Y21
2007 WY3JPL Sentry1356 Dec. 12R E M O V E DRisk listing removed at 1250 UTC 12 Dec.
NEODyS1416 Dec. 4R E M O V E D
Assessment postings were noted by A/CC on 4 Dec., 5 Dec., 7 Dec. & 12 Dec.   -   References: DOUs 2007-X15, 2007-X19, 2007-X26, 2007-X53, 2007-Y21, 2007-Y30 & 2007-Y52
2007 VN243JPL Sentry1509 Dec. 2R E M O V E DRisk listing removed at 1252 UTC 2 Dec.
NEODyS1509 Dec. 2R E M O V E D
Assessment postings were noted by A/CC on 2 Dec.   -   References: DOUs 2007-X07 & 2007-Y51
2007 TU24JPL Sentry1416 Dec. 4R E M O V E DRisk listing removed at 1405 UTC 4 Dec.
Assessment postings were noted by A/CC on 4 Dec.   -   References: DOUs 2007-X15, 2007-X19 & 2007-X26

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

For a list of all risk-rated objects currently in view, 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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