A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted During April 2012

Compiled at 2344 UTC on 30 April 2012

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[ Today's risk monitoring & other observing news | object risks cleared in April | 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 HJ31NEODyS1739 April 302086-208616.84e-10-9.14-9.140Based on 9 optical observations (of which 0 are rejected as outliers) from 2012-04-28.285 to 2012-04-29.293.
JPL Sentry1718 April 292059-2109123.9e-08-7.14-7.330Analysis based on 9 observations spanning 1.0078 days (2012-Apr-28.28455 to 2012-Apr-29.29231). Diameter approximately 0.045 km. from mean, weighted H=24.4.
Assessment postings were noted by A/CC on 29 April & 30 April   -   References: MPEC 2012-H86
2012 HE31NEODyS1739 April 302083-208317.35e-08-7.67-7.670Based on 18 optical observations (of which 0 are rejected as outliers) from 2012-04-27.199 to 2012-04-29.480.
JPL Sentry1718 April 29209411.1e-07-7.57-7.570Analysis based on 18 observations spanning 2.2815 days (2012-Apr-27.19816 to 2012-Apr-29.479639). Diameter approximately 0.024 km. from mean, weighted H=25.7.
Assessment postings were noted by A/CC on 29 April & 30 April   -   References: MPEC 2012-H82
2012 HB25NEODyS1739 April 302016-2090112.87e-05-3.91-4.060Based on 19 optical observations (of which 0 are rejected as outliers) from 2012-04-24.354 to 2012-04-30.203.
JPL Sentry1738 April 302016-2090132.5e-05-3.92-4.230Analysis based on 19 observations spanning 5.8496 days (2012-Apr-24.35308 to 2012-Apr-30.20269). Diameter approximately 0.037 km. from mean, weighted H=24.8.
Assessment postings were noted by A/CC on 28 April, 29 April & 30 April   -   References: MPEC 2012-H77 plus DOUs 2012-H81 & 2012-H91
2012 HP13NEODyS1437 April 29R E M O V E D
JPL Sentry1437 April 292084-209233.7e-08-7.22-7.480Analysis based on 169 observations spanning 5.3761 days (2012-Apr-22.46032 to 2012-Apr-27.836459). Diameter approximately 0.048 km. from mean, weighted H=24.2.
Assessment postings were noted by A/CC on 24 April, 25 April, 26 April, 27 April, 28 April & 29 April   -   References: MPEC 2012-H60 plus DOUs 2012-H64, 2012-H71, 2012-H75, 2012-H76 & 2012-H81
2012 HG8JPL Sentry2310 April 30203016.7e-08-3.92-3.920Analysis based on 142 observations spanning 9.9119 days (2012-Apr-20.25484 to 2012-Apr-30.16675). Diameter approximately 0.370 km. from mean, weighted H=19.8.
NEODyS1738 April 30R E M O V E D
Assessment postings were noted by A/CC on 22 April, 23 April, 24 April, 25 April, 26 April, 27 April, 28 April & 30 April   -   References: MPEC 2012-H45 plus DOUs 2012-H55, 2012-H61, 2012-H64, 2012-H71, 2012-H75, 2012-H76 & 2012-H91
2012 HG2JPL Sentry2310 April 302053-205671.4e-05-5.96-6.080Analysis based on 129 observations spanning 9.0663 days (2012-Apr-20.37147 to 2012-Apr-29.43775). Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS1739 April 302053-20912661.05e-03-4.19-4.940Based on 129 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-04-29.439.
Assessment postings were noted by A/CC on 21 April, 22 April, 23 April, 24 April, 25 April, 26 April, 29 April & 30 April   -   References: MPEC 2012-H35 plus DOUs 2012-H36, 2012-H44, 2012-H55, 2012-H61, 2012-H64, 2012-H71, 2012-H81 & 2012-H91
2012 GDNEODyS1500 April 72067-206711.34e-10-10.95-10.950Based on 18 optical observations (of which 1 are rejected as outliers) from 2012-04-01.345 to 2012-04-06.294.
JPL Sentry1500 April 7203616.0e-10-9.91-9.910Analysis based on 17 observations spanning 4.9485 days (2012-Apr-01.34437 to 2012-Apr-06.292896). Diameter approximately 0.014 km. from mean, weighted H=26.9.
Assessment postings were noted by A/CC on 2 April, 3 April, 4 April & 7 April   -   References: MPEC 2012-G15 plus DOUs 2012-G20 & 2012-G24
2012 ECJPL Sentry1738 April 30211113.5e-07-6.22-6.220Analysis based on 106 observations spanning 42.099 days (2012-Mar-01.3419 to 2012-Apr-12.44099). Diameter approximately 0.071 km. from mean, weighted H=23.4.
Assessment postings were noted by A/CC on 1 April & 30 April   -   References: DOUs 2012-G07, 2012-G27 & 2012-H64
2012 DA14JPL Sentry2310 April 302020-2082733.1e-04-3.24-3.820Analysis based on 185 observations spanning 62.448 days (2012-Feb-23.03431 to 2012-Apr-25.482804). Diameter approximately 0.045 km. from mean, weighted H=24.4.
NEODyS1556 April 282026-20901822.84e-04-3.29-3.840Based on 188 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-04-25.484.
Assessment postings were noted by A/CC on 1 April, 13 April, 18 April, 19 April, 20 April, 21 April, 24 April, 26 April, 28 April & 30 April   -   References: DOUs 2012-G07, 2012-G35, 2012-H19, 2012-H22, 2012-H28, 2012-H61 & 2012-H76
2011 AG5JPL Sentry2004 April 32040-204742.0e-03-1.00-1.011Analysis based on 210 observations spanning 316.77 days (2010-Nov-08.629742 to 2011-Sep-21.398727). Diameter approximately 0.140 km. from mean, weighted H=21.9.
An assessment posting was noted by A/CC on 3 April   -   Reference: DOU 2012-F113
2009 VZ39JPL Sentry0304 April 292012-21107937.0e-06-6.04-6.870Analysis based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546). Diameter approximately 0.009 km. from mean, weighted H=27.9.
An assessment posting was noted by A/CC on 29 April   -   References: no recent MPECs
2003 YS70NEODyS1509 April 162081-208223.31e-07-8.75-8.790Based on 78 optical observations (of which 7 are rejected as outliers) from 2003-12-22.201 to 2003-12-27.192.
An assessment posting was noted by A/CC on 16 April   -   References: no recent MPECs
2000 SZ162NEODyS1509 April 162078-207812.45e-07-8.09-8.090Based on 30 optical observations (of which 0 are rejected as outliers) from 2000-09-29.320 to 2000-10-07.191.
An assessment posting was noted by A/CC on 16 April   -   References: no recent MPECs
C   L   E   A   R   E   D
2012 HM8JPL Sentry1308 April 27R E M O V E DRisk listing removed at 0850 UTC 27 April
NEODyS1542 April 26R E M O V E D
Assessment postings were noted by A/CC on 22 April, 24 April, 25 April, 26 April & 27 April   -   References: MPEC 2012-H50 plus DOUs 2012-H61, 2012-H64, 2012-H71, 2012-H75 & 2012-H76
2012 HL8JPL Sentry1437 April 29R E M O V E DRisk listing removed at 0850 UTC 29 April
Assessment postings were noted by A/CC on 22 April, 24 April, 25 April, 26 April & 29 April   -   References: MPEC 2012-H49 plus DOUs 2012-H61, 2012-H64, 2012-H71 & 2012-H81
2012 HQJPL Sentry1626 April 20R E M O V E DRisk listing removed at 0853 UTC 20 April
Assessment postings were noted by A/CC on 18 April & 20 April   -   References: MPEC 2012-H18 plus DOUs 2012-H28, 2012-H36 & 2012-H44
2012 GV17JPL Sentry1437 April 29R E M O V E DRisk listing removed at 0850 UTC 29 April
NEODyS2105 April 28R E M O V E D
Assessment postings were noted by A/CC on 17 April, 18 April, 21 April, 22 April, 24 April, 26 April, 27 April, 28 April & 29 April   -   References: MPEC 2012-H16 plus DOUs 2012-H36, 2012-H44, 2012-H61, 2012-H75, 2012-H76, 2012-H81 & 2012-H91
2012 GA12NEODyS1626 April 20R E M O V E D
Assessment postings were noted by A/CC on 17 April & 20 April   -   References: MPEC 2012-H08 plus DOUs 2012-H28, 2012-H44 & 2012-H55
2012 GE5NEODyS1509 April 16R E M O V E D
JPL Sentry1509 April 16R E M O V E DRisk listing removed at 0849 UTC 16 April
Assessment postings were noted by A/CC on 14 April, 15 April & 16 April   -   References: MPEC 2012-G44 plus DOUs 2012-H01 & 2012-H22
2012 GKNEODyS1556 April 13R E M O V E D
JPL Sentry1649 April 8R E M O V E DRisk listing removed at 0856 UTC 8 April
Assessment postings were noted by A/CC on 4 April, 5 April, 8 April & 13 April   -   References: MPEC 2012-G21 plus DOUs 2012-G25, 2012-G26, 2012-G27, 2012-G29, 2012-G30, 2012-G35, 2012-H01, 2012-H10, 2012-H19, 2012-H22, 2012-H36, 2012-H64, 2012-H71 & 2012-H76
2012 FB71JPL Sentry1710 April 14R E M O V E DRisk listing removed at 0849 UTC 14 April
Assessment postings were noted by A/CC on 2 April & 14 April   -   References: MPEC 2012-G12 plus DOU 2012-G39
2012 FA57JPL Sentry1631 April 6R E M O V E DRisk listing removed at 0850 UTC 6 April
NEODyS1629 April 3R E M O V E D
Assessment postings were noted by A/CC on 1 April, 3 April & 6 April   -   References: DOUs 2012-G07, 2012-G17 & 2012-G23
2012 FM52JPL Sentry1535 April 4R E M O V E DRisk listing removed at 0849 UTC 4 April
Assessment postings were noted by A/CC on 3 April & 4 April   -   References: MPEC 2012-G19 plus DOUs 2012-G20, 2012-G29, 2012-G35, 2012-G39, 2012-H10, 2012-H28, 2012-H64, 2012-H71 & 2012-H81
2012 FR1NEODyS1500 April 2R E M O V E D
An assessment posting was noted by A/CC on 2 April   -   References: DOUs 2012-G10, 2012-G17, 2012-G30, 2012-G35 & 2012-H76
2012 FQ1NEODyS1509 April 16R E M O V E D
An assessment posting was noted by A/CC on 16 April   -   References: DOUs 2012-G29, 2012-G30, 2012-H01 & 2012-H36
2012 EG5JPL Sentry1514 April 1R E M O V E DRisk listing removed at 0856 UTC 1 April
An assessment posting was noted by A/CC on 1 April   -   References: DOUs 2012-G07, 2012-G17, 2012-G20, 2012-G22, 2012-G25 & 2012-G39
2011 LT17JPL Sentry1738 April 30R E M O V E DRisk listing removed at 1355 UTC 30 April
An assessment posting was noted by A/CC on 30 April   -   References: MPEC 2012-H92
2010 WW8NEODyS1509 April 16R E M O V E D
An assessment posting was noted by A/CC on 16 April   -   References: no recent MPECs
2010 DJ77NEODyS1509 April 16R E M O V E D
An assessment posting was noted by A/CC on 16 April   -   References: no recent MPECs
2010 AR85NEODyS1657 April 18R E M O V E D
An assessment posting was noted by A/CC on 18 April   -   References: no recent MPECs
2008 EJ68NEODyS1509 April 16R E M O V E D
An assessment posting was noted by A/CC on 16 April   -   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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