Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9145h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E5, p. 9145-9149.
Other
5
Ejecta, Leonid Meteoroids, Lunar Craters, Meteoroid Showers, Earth-Moon System, Escape Velocity, Orbit Perturbation, Orbital Mechanics, Solar Orbits, Moon, Impact Craters, Meteoroids, Origin, Source, Giordano Bruno, Ejecta, Corvids, Parameters, Position (Location), Motion, Velocity, Meteor Shower, Hypotheses, Orbit, Geometry, Commensurability, Escape, Pertubation, Leonids, Calculations
Scientific paper
The study points out three difficulties with the hypothesis of Hartung (1993) that the Corvid meteor system, observed only once in 1937, may be the return of the clump of ejecta from the formation of a lunar crater, specifically, an event recorded in the chronicles of Gervase of Canterbury on June 25, 1178, which Hartung (1976) previously suggested may be an eyewitness account of the formation of the lunar crater Giordano Bruno. On the basis of this, he predicts that another Corvid shower may be observed in 2003 or 2006. This hypothesis is rejected on the contention that it is implausible that a clump of ejecta could be launched into heliocentric orbit with a low enough dispersion in velocity among separate pieces that it would produce a meteor shower in just one year and not others. Subsequent perturbations by the earth on parts of the clump passing near the earth but not impacting would destroy the coherence of the clump on a time scale much shorter than the 759-yr interval proposed. There are so many orbits that could yield a shower after 759 yr that it is unlikely that a prediction of a return in a specific year would be correct.
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