Washougal - A stony meteorite with a retrograde orbit

Details Washougal - A stony meteorite with a retrograde orbit Washougal - A stony meteorite with a retrograde orbit

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80..789c&link_type=abstract

Journal of Geophysical Research, vol. 80, Feb. 10, 1975, p. 789-793.

Physics

Ablation, Atmospheric Entry, Geomagnetism, Meteorite Collisions, Orbital Elements, Stony Meteorites, Angular Distribution, Atmospheric Effects, Cosmic Rays, Feldspars, Gravitational Effects, Particle Tracks

Scientific paper

The Washougal howardite is alleged to have struck the earth from a retrograde orbit, with a preatmospheric velocity of about 55 km/s. To check this report, we determined the ablation loss of this 0.2-kg meteorite from the angular distribution of cosmic ray tracks, using a new method based on the model of Maurette et al. (1969). The preatmospheric mass was 660 plus or minus 220 kg, which according to meteor theory implies a geocentric velocity of less than about 35 km/s. This upper limit is well below the minimum value for a retrograde orbit, 48 km/s.

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