A/CC's Consolidated Risk Tables

Earth Impact Risk Ratings Posted in the Last 31 Days

Compiled at 1327 UTC on 21 May 2013

[ The Tracking News | ephemerides | cleared ]

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

2013 JD34	NEODyS	1333 May 18	2058-2058	1	7.93e-10	-8.87	-8.87	0	Based on 16 optical observations (of which 0 are rejected as outliers) from 2013-05-15.384 to 2013-05-17.312.
	JPL Sentry	2359 May 17	2058	1	3.8e-10	-9.19	-9.19	0	Analysis based on 16 observations spanning 1.9279 days (2013-May-15.3829 to 2013-May-17.31075). Diameter approximately 0.032 km. from mean, weighted H=25.1.
	Assessment postings were noted by A/CC on 17 May & 18 May - References: MPEC 2013-K08

2013 HT14	NEODyS	0000 April 24	2071-2077	3	1.22e-06	-6.36	-6.49	0	Based on 23 optical observations (of which 0 are rejected as outliers) from 2013-04-21.260 to 2013-04-23.276.
	JPL Sentry	2302 April 23	2021-2077	7	5.1e-06	-5.04	-5.05	0	Analysis based on 23 observations spanning 2.0169 days (2013-Apr-21.25884 to 2013-Apr-23.27569). Diameter approximately 0.019 km. from mean, weighted H=26.3.
	Assessment postings were noted by A/CC on 23 April & 24 April - References: MPEC 2013-H39

2013 GA55	JPL Sentry	2359 April 29	2070-2113	21	1.2e-05	-6.50	-7.19	0	Analysis based on 14 observations spanning 1.7271 days (2013-Apr-09.44557 to 2013-Apr-11.17271). Diameter approximately 0.010 km. from mean, weighted H=27.7.
2013 GA55	An assessment posting was noted by A/CC on 29 April - References: no MPECs

2013 GW38	JPL Sentry	2359 April 29	2061-2113	13	6.4e-06	-7.07	-7.61	0	Analysis based on 18 observations spanning 1.3411 days (2013-Apr-09.45225 to 2013-Apr-10.79339). Diameter approximately 0.007 km. from mean, weighted H=28.5.
2013 GW38	An assessment posting was noted by A/CC on 29 April - References: no MPECs

2013 GM3	JPL Sentry	2359 April 29	2028-2113	174	1.5e-04	-4.62	-5.49	0	Analysis based on 62 observations spanning 9.9806 days (2013-Apr-03.32112 to 2013-Apr-13.30177). Diameter approximately 0.019 km. from mean, weighted H=26.2.
	NEODyS	1516 April 24	2028-2090	115	8.53e-05	-4.81	-5.53	0	Based on 62 optical observations (of which 2 are rejected as outliers) from 2013-04-03.322 to 2013-04-13.303.
	Assessment postings were noted by A/CC on 24 April & 29 April - References: DOU 2013-H42

2013 FU13	JPL Sentry	2359 April 29	2081-2098	5	2.1e-04	-5.04	-5.11	0	Analysis based on 21 observations spanning 17.219 days (2013-Mar-24.34961 to 2013-Apr-10.568711). Diameter approximately 0.012 km. from mean, weighted H=27.2.
2013 FU13	An assessment posting was noted by A/CC on 29 April - References: no MPECs

2013 ED28	JPL Sentry	2359 April 29	2036	1	3.2e-07	-4.18	-4.18	0	Analysis based on 41 observations spanning 21.868 days (2013-Mar-07.21735 to 2013-Mar-29.085141). Diameter approximately 0.170 km. from mean, weighted H=21.4.
2013 ED28	An assessment posting was noted by A/CC on 29 April - References: no MPECs

2012 YR1	JPL Sentry	2359 April 29	2077	1	7.4e-07	-7.09	-7.09	0	Analysis based on 30 observations spanning 23.330 days (2012-Dec-20.20945 to 2013-Jan-12.53922). Diameter approximately 0.017 km. from mean, weighted H=26.5.
2012 YR1	An assessment posting was noted by A/CC on 29 April - References: no recent MPECs

2012 WR10	JPL Sentry	2359 April 29	2087-2112	2	5.7e-07	-8.36	-8.42	0	Analysis based on 45 observations spanning 26.156 days (2012-Nov-22.21759 to 2012-Dec-18.37324). Diameter approximately 0.007 km. from mean, weighted H=28.5.
2012 WR10	An assessment posting was noted by A/CC on 29 April - References: no recent MPECs

2009 VZ39	JPL Sentry	0404 May 9	2013-2110	788	6.9e-06	-6.25	-7.48	0	Analysis 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.
2009 VZ39	An assessment posting was noted by A/CC on 9 May - References: no recent MPECs

99942 Apophis (2004 MN4)	NEODyS	1916 May 1	2060-2105	12	5.71e-06	-3.19	-3.32	0	Based on 3987 optical observations (of which 0 are rejected as outliers) from 2004-03-15.126 to 2013-04-15.157 and also on twenty radar data points on 2005-01-27, 2005-01-29, 2005-01-30, 2005-08-07, 2006-05-06, 2012-12-21, 2012-12-22, 2013-01-03, 2013-01-05, 2013-01-06, 2013-01-09, 2013-01-10, 2013-01-14, 2013-01-16, 2013-02-18, 2013-02-20 and 2013-03-15.
	JPL Sentry	1916 May 1	2060-2105	12	5.7e-06	-3.19	-3.32	0	Analysis based on 13 radar delay, 7 Doppler, and 3987 optical observations spanning 3318.0 days (2004-Mar-15.126289 to 2013-Apr-15.15729). Diameter approximately 0.330 km. from mean, weighted H=19.7.
	Assessment postings were noted by A/CC on 1 May - References: DOUs 2013-H24, 2013-H48, 2013-J01, 2013-J05, 2013-J18, 2013-J26 & 2013-J33
C L E A R E D
2013 JR28	NEODyS	1333 May 18	R E M O V E D
	JPL Sentry	1333 May 18	R E M O V E D						Risk listing removed at 0950 UTC 18 May
	Assessment postings were noted by A/CC on 15 May, 16 May & 18 May - References: MPEC 2013-J70 plus DOUs 2013-K12 & 2013-K32

2013 JM22	JPL Sentry	2008 May 20	R E M O V E D						Risk listing removed at 1955 UTC 20 May
	NEODyS	1236 May 16	R E M O V E D
	Assessment postings were noted by A/CC on 13 May, 14 May, 15 May, 16 May, 17 May & 20 May - References: MPEC 2013-J59 plus DOUs 2013-J69, 2013-K01, 2013-K12 & 2013-K32

2013 JW17	JPL Sentry	1258 May 14	R E M O V E D						Risk listing removed at 0949 UTC 14 May
2013 JW17	Assessment postings were noted by A/CC on 12 May, 13 May & 14 May - References: MPEC 2013-J49 plus DOUs 2013-J53, 2013-J60, 2013-K14 & 2013-K24

2013 JS17	NEODyS	1333 May 18	R E M O V E D
	JPL Sentry	1333 May 18	R E M O V E D						Risk listing removed at 0951 UTC 18 May
	Assessment postings were noted by A/CC on 12 May, 13 May & 18 May - References: MPEC 2013-J45 plus DOUs 2013-J53 & 2013-K12

2013 JM14	JPL Sentry	1459 May 12	R E M O V E D						Risk listing removed at 0951 UTC 12 May
	NEODyS	1459 May 12	R E M O V E D
	Assessment postings were noted by A/CC on 10 May, 11 May & 12 May - References: MPEC 2013-J37 plus DOUs 2013-J43, 2013-J60, 2013-K12 & 2013-K24

2013 JH14	JPL Sentry	1422 May 13	R E M O V E D						Risk listing removed at 0950 UTC 13 May
2013 JH14	Assessment postings were noted by A/CC on 10 May & 13 May - References: MPEC 2013-J34 plus DOUs 2013-J53, 2013-K24 & 2013-K32

2013 JE1	JPL Sentry	1504 May 6	R E M O V E D						Risk listing removed at 1150 UTC 6 May
	NEODyS	1504 May 6	R E M O V E D
	Assessment postings were noted by A/CC on 4 May & 6 May - References: MPEC 2013-J12 plus DOUs 2013-J20, 2013-J26, 2013-J32, 2013-J41, 2013-J53, 2013-J60, 2013-K14 & 2013-K24

2013 HT25	JPL Sentry	1402 May 10	R E M O V E D						Risk listing removed at 0956 UTC 10 May
	NEODyS	1402 May 10	R E M O V E D
	Assessment postings were noted by A/CC on 7 May & 10 May - References: MPEC 2013-J24 plus DOU 2013-J33

2013 HR	JPL Sentry	1349 April 21	R E M O V E D						Risk listing removed at 0951 UTC 21 April
	NEODyS	1349 April 21	R E M O V E D
	Assessment postings were noted by A/CC on 21 April - References: DOUs 2013-H25 & 2013-H26

2013 GG69	JPL Sentry	1622 April 30	R E M O V E D						Risk listing removed at 1549 UTC 30 April
	NEODyS	1349 April 21	R E M O V E D
	Assessment postings were noted by A/CC on 20 April, 21 April, 22 April, 29 April & 30 April - References: DOUs 2013-H24, 2013-H26, 2013-H50, 2013-J05, 2013-J11, 2013-J41 & 2013-K14

2013 GF69	JPL Sentry	1457 April 22	R E M O V E D						Risk listing removed at 0951 UTC 22 April
	NEODyS	1349 April 21	R E M O V E D
	Assessment postings were noted by A/CC on 21 April & 22 April - References: DOUs 2013-H25, 2013-H26, 2013-J05, 2013-J11, 2013-J32 & 2013-J60

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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