A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During February 2012

Compiled at 2359 UTC on 29 February 2012

<< January 2012 CRT | CRT Archive Index | March 2012 CRT >>

[ Today's risk monitoring & other observing news | object risks cleared in February | 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 CLOMON2 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
2012 DJ54JPL Sentry2119 Feb. 292068-2108196.1e-05-6.32-6.560Analysis based on 12 observations spanning 2.2489 days (2012-Feb-27.46779 to 2012-Feb-29.71672). Diameter approximately 0.006 km. from mean, weighted H=28.7.
An assessment posting was noted by A/CC on 29 Feb.   -   References: MPEC 2012-D104
2012 DY43NEODyS1609 Feb. 292048-207121.45e-09-7.37-7.410Based on 6 optical observations (of which 0 are rejected as outliers) from 2012-02-27.490 to 2012-02-28.611.
An assessment posting was noted by A/CC on 29 Feb.   -   References: MPEC 2012-D98
2012 DZ32JPL Sentry2300 Feb. 272088-210341.7e-09-7.26-7.630Analysis based on 19 observations spanning .96896 days (2012-Feb-26.3665 to 2012-Feb-27.33546). Diameter approximately 0.191 km. from mean, weighted H=21.2.
An assessment posting was noted by A/CC on 27 Feb.   -   References: MPEC 2012-D89
2012 DA14NEODyS1609 Feb. 292020-20903633.43e-04-3.17-4.020Based on 49 optical observations (of which 3 are rejected as outliers) from 2012-02-23.029 to 2012-02-27.632.
JPL Sentry1609 Feb. 292020-20571172.1e-04-3.31-4.090Analysis based on 55 observations spanning 6.0511 days (2012-Feb-23.03431 to 2012-Feb-29.085416). Diameter approximately 0.045 km. from mean, weighted H=24.4.
Assessment postings were noted by A/CC on 24 Feb., 25 Feb., 26 Feb., 27 Feb., 28 Feb. & 29 Feb.   -   References: MPEC 2012-D51 plus DOUs 2012-D53, 2012-D60, 2012-D63, 2012-D81, 2012-D93 & 2012-D100
2012 DY13NEODyS1631 Feb. 252060-206015.16e-10-10.54-10.540Based on 51 optical observations (of which 0 are rejected as outliers) from 2012-02-22.255 to 2012-02-25.194.
JPL Sentry1539 Feb. 25R E M O V E DRisk listing removed at 0956 UTC 25 Feb.
Assessment postings were noted by A/CC on 23 Feb., 24 Feb. & 25 Feb.   -   References: MPEC 2012-D47 plus DOU 2012-D60
2012 CS46JPL Sentry0108 Feb. 192019-21091204.0e-07-7.71-8.450Analysis based on 6 observations spanning 1.0036 days (2012-Feb-14.36119 to 2012-Feb-15.364751). Diameter approximately 0.009 km. from mean, weighted H=27.8.
An assessment posting was noted by A/CC on 19 Feb.   -   References: MPEC 2012-D19
2012 CQ46JPL Sentry0032 Feb. 192040-208431.3e-08-8.66-8.670Analysis based on 7 observations spanning 2.0613 days (2012-Feb-13.31124 to 2012-Feb-15.372533). Diameter approximately 0.012 km. from mean, weighted H=27.2.
An assessment posting was noted by A/CC on 19 Feb.   -   References: MPEC 2012-D17
2012 CA21NEODyS1609 Feb. 29R E M O V E D
JPL Sentry1609 Feb. 29207311.0e-06-3.14-3.140Analysis based on 90 observations spanning 15.923 days (2012-Feb-12.12022 to 2012-Feb-28.04325). Diameter approximately 0.440 km. from mean, weighted H=19.4.
Assessment postings were noted by A/CC on 14 Feb., 15 Feb., 17 Feb., 19 Feb., 20 Feb., 21 Feb., 23 Feb., 24 Feb., 25 Feb., 26 Feb., 27 Feb., 28 Feb. & 29 Feb.   -   References: MPEC 2012-C51 plus DOUs 2012-D06, 2012-D11, 2012-D22, 2012-D27, 2012-D37, 2012-D44, 2012-D53, 2012-D60, 2012-D63, 2012-D81, 2012-D93 & 2012-D100
2012 CL17JPL Sentry1620 Feb. 122095-2112221.7e-06-6.10-6.660Analysis based on 20 observations spanning 1.0704 days (2012-Feb-10.31603 to 2012-Feb-11.386411). Diameter approximately 0.024 km. from mean, weighted H=25.7.
Assessment postings were noted by A/CC on 11 Feb. & 12 Feb.   -   References: MPEC 2012-C42 plus DOU 2012-C43
2012 CUJPL Sentry1823 Feb. 222040-210051.3e-06-6.59-6.850Analysis based on 48 observations spanning 18.849 days (2012-Feb-02.40401 to 2012-Feb-21.2528). Diameter approximately 0.021 km. from mean, weighted H=26.0.
NEODyS1627 Feb. 142040-208336.71e-08-7.46-7.490Based on 40 optical observations (of which 0 are rejected as outliers) from 2012-02-02.405 to 2012-02-13.420.
Assessment postings were noted by A/CC on 3 Feb., 4 Feb., 5 Feb., 8 Feb., 14 Feb. & 22 Feb.   -   References: MPEC 2012-C21 plus DOUs 2012-C22, 2012-C25, 2012-C35, 2012-C49 & 2012-D39
2012 BP123JPL Sentry0053 Feb. 22058-210083.6e-09-9.71-9.880Analysis based on 13 observations spanning .91365 days (2012-Jan-31.31538 to 2012-Feb-01.22903). Diameter approximately 0.013 km. from mean, weighted H=27.1.
An assessment posting was noted by A/CC on 2 Feb.   -   References: MPEC 2012-C04
2012 BN123JPL Sentry0053 Feb. 22074-211044.5e-09-7.68-8.070Analysis based on 10 observations spanning .93800 days (2012-Jan-31.19728 to 2012-Feb-01.13528). Diameter approximately 0.078 km. from mean, weighted H=23.2.
An assessment posting was noted by A/CC on 2 Feb.   -   References: MPEC 2012-C02
2012 BA102JPL Sentry1823 Feb. 222104-211236.0e-06-6.38-6.390Analysis based on 18 observations spanning 22.172 days (2012-Jan-30.21365 to 2012-Feb-21.38575). Diameter approximately 0.017 km. from mean, weighted H=26.5.
Assessment postings were noted by A/CC on 1 Feb. & 22 Feb.   -   References: DOUs 2012-C01 & 2012-D39
2012 BJ86JPL Sentry1638 Feb. 28211211.9e-07-5.26-5.260Analysis based on 66 observations spanning 29.235 days (2012-Jan-29.10142 to 2012-Feb-27.33649). Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS1645 Feb. 272090-209014.67e-08-5.80-5.80Based on 55 optical observations (of which 0 are rejected as outliers) from 2012-01-29.102 to 2012-02-26.125.
Assessment postings were noted by A/CC on 2 Feb., 3 Feb., 8 Feb., 12 Feb., 19 Feb., 21 Feb., 23 Feb., 24 Feb., 25 Feb., 26 Feb., 27 Feb. & 28 Feb.   -   References: DOUs 2012-C12, 2012-C35, 2012-C43, 2012-D22, 2012-D37, 2012-D44, 2012-D53, 2012-D60, 2012-D63, 2012-D81 & 2012-D93
2012 BA77NEODyS1823 Feb. 222025-2088303.54e-05-4.64-5.250Based on 12 optical observations (of which 0 are rejected as outliers) from 2012-01-24.368 to 2012-01-29.453.
JPL Sentry1823 Feb. 222021-2100633.0e-05-4.70-5.320Analysis based on 12 observations spanning 5.0846 days (2012-Jan-24.36724 to 2012-Jan-29.451872). Diameter approximately 0.023 km. from mean, weighted H=25.9.
Assessment postings were noted by A/CC on 22 Feb.   -   Reference: DOU 2012-D39
2012 BW13NEODyS1548 Feb. 72072-208434.95e-08-8.50-8.860Based on 34 optical observations (of which 1 are rejected as outliers) from 2012-01-19.208 to 2012-01-24.895.
JPL Sentry1548 Feb. 72072-2111113.6e-06-6.77-7.140Analysis based on 34 observations spanning 5.6870 days (2012-Jan-19.20743 to 2012-Jan-24.89438). Diameter approximately 0.012 km. from mean, weighted H=27.2.
Assessment postings were noted by A/CC on 7 Feb.   -   References: DOU 2012-C34
2011 UE305JPL Sentry1552 Feb. 24210912.2e-09-7.02-7.020Analysis based on 76 observations spanning 64.869 days (2011-Oct-30.46441 to 2012-Jan-03.33369). Diameter approximately 0.190 km. from mean, weighted H=21.2.
An assessment posting was noted by A/CC on 24 Feb.   -   References: DOU 2012-D53
2008 JD33JPL Sentry0432 Feb. 282016-2095341.1e-08-8.49-9.010Analysis based on 13 observations spanning .11183 days (2008-May-15.28689 to 2008-May-15.39872). Diameter approximately 0.015 km. from mean, weighted H=27.3.
An assessment posting was noted by A/CC on 28 Feb.   -   References: no recent MPECs
C   L   E   A   R   E   D
2012 DA33NEODyS1609 Feb. 29R E M O V E D
Assessment postings were noted by A/CC on 28 Feb. & 29 Feb.   -   References: MPEC 2012-D90 plus DOU 2012-D100
2012 DY32JPL Sentry1638 Feb. 28R E M O V E DRisk listing removed at 0942 UTC 28 Feb.
Assessment postings were noted by A/CC on 27 Feb. & 28 Feb.   -   References: MPEC 2012-D88 plus DOUs 2012-D93 & 2012-D100
2012 DZJPL Sentry1549 Feb. 20R E M O V E DRisk listing removed at 0851 UTC 20 Feb.
Assessment postings were noted by A/CC on 19 Feb. & 20 Feb.   -   References: MPEC 2012-D25 plus DOUs 2012-D27, 2012-D37 & 2012-D39
2012 DXJPL Sentry0107 Feb. 24R E M O V E DRisk listing removed at 0050 UTC 24 Feb.
Assessment postings were noted by A/CC on 19 Feb., 20 Feb., 21 Feb., 23 Feb. & 24 Feb.   -   References: MPEC 2012-D23 plus DOUs 2012-D27, 2012-D37 & 2012-D39, radar: 24 Feb.
2012 DNNEODyS1709 Feb. 21R E M O V E D
JPL Sentry1709 Feb. 21R E M O V E DRisk listing removed at 0853 UTC 21 Feb.
Assessment postings were noted by A/CC on 18 Feb., 19 Feb. & 21 Feb.   -   References: MPEC 2012-D14 plus DOUs 2012-D37, 2012-D39, 2012-D44, 2012-D60, 2012-D93 & 2012-D100
2012 CC29NEODyS1711 Feb. 19R E M O V E D
JPL Sentry1711 Feb. 19R E M O V E DRisk listing removed at 0952 UTC 19 Feb.
Assessment postings were noted by A/CC on 15 Feb., 16 Feb. & 19 Feb.   -   References: MPEC 2012-C54 plus DOUs 2012-D22, 2012-D39 & 2012-D81
2012 BM86JPL Sentry1616 Feb. 4R E M O V E DRisk listing removed at 0951 UTC 4 Feb.
NEODyS1744 Feb. 1R E M O V E D
Assessment postings were noted by A/CC on 1 Feb., 2 Feb., 3 Feb. & 4 Feb.   -   References: DOUs 2012-C01, 2012-C12, 2012-C15, 2012-C22, 2012-C35, 2012-D06, 2012-D39 & 2012-D63
2012 BL86JPL Sentry1454 Feb. 3R E M O V E DRisk listing removed at 0850 UTC 3 Feb.
An assessment posting was noted by A/CC on 3 Feb.   -   References: DOUs 2012-C15, 2012-C22, 2012-C49 & 2012-D93
2012 BO11NEODyS1454 Feb. 3R E M O V E D
An assessment posting was noted by A/CC on 3 Feb.   -   References: DOUs 2012-C15 & 2012-C22
2011 HJ7NEODyS1552 Feb. 24R E M O V E D
JPL Sentry1808 Feb. 23R E M O V E DRisk listing removed at 1757 UTC 23 Feb.
Assessment postings were noted by A/CC on 23 Feb. & 24 Feb.   -   References: MPEC 2012-D45
2010 AR85JPL Sentry2204 Feb. 14R E M O V E DRisk listing removed at 2127 UTC 14 Feb.
An assessment posting was noted by A/CC on 14 Feb.   -   References: no recent MPECs

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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