Asteroid Comet Impact Hazards - Florida International University

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<strong>Asteroid</strong> 1997 XF11 (Earth Close-Approach) Epoch = 1998 Mar 30.0 TDB e = 0.48374055 q = 0.74443182 AU Tp = 1997-Jul-01.191519 TDB Node = 214.12725759 deg (J2000) w = 102.47227749 deg (J2000) i = 4.09477290 deg (J2000) a = 1.441752196 AU M = 154.75017350 deg Solution excluding pre-discovery observations ● Error ellipse is much longer because the observational time span is much shorter (3 months versus 8 years). ● Most likely miss distance is 86,000 km (54,000 mi). ● Minimum miss distance is 28,000 km (17,000 mi). ● Probability of Earth impact is zero. http://ssd.jpl.nasa.gov/ca_97xf11.html (5 of 9)12/5/2005 4:29:17 PM
<strong>Asteroid</strong> 1997 XF11 (Earth Close-Approach) Figure 2. This plot shows the position error ellipse based on the original orbit solution not including the pre-discovery observations. The original full-size plot (created by Paul Chodas, 1998-May-20) is also available as a PostScript file. A closeup of this plot is shown below in Figure 3. http://ssd.jpl.nasa.gov/ca_97xf11.html (6 of 9)12/5/2005 4:29:17 PM
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Asteroid Comet Impact Hazards: Intr
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Neo Catalog 12/5/2005 NEO Catalog h
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Unusual Minor Planets Unusual Minor
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Page 307 and 308: Asteroid 1997 XF11 (Earth Close-App
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Page 315 and 316: Related Links 12/5/2005 Related Lin
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Page 321 and 322: THE TUNGUSKA METEORITE PROBLEM TODA
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Page 347 and 348: THREE STAGES IN METEORITE RESEARCH
Page 349 and 350: THREE STAGES IN METEORITE RESEARCH
Page 351: NEAR-EARTH ASTEROID TRACKING orbit
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