Meteors in the IAU Meteor Data Center on Hyperbolic Orbits

Details Meteors in the IAU Meteor Data Center on Hyperbolic Orbits Meteors in the IAU Meteor Data Center on Hyperbolic Orbits

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008em%26p..102...67h&link_type=abstract

Earth, Moon, and Planets, Volume 102, Issue 1-4, pp. 67-71

Physics

6

Meteoroid, Meteor Shower, Hyperbolic, Interstellar

Scientific paper

The hyperbolic meteor orbits among the 4,581 photographic and 62,906 radar meteors of the IAU MDC have been analysed using statistical methods. It was shown that the vast majority of hyperbolic orbits has been caused by the dispersion of determined velocities. The large proportion of hyperbolic orbits among the known meteor showers strongly suggests the hyperbolicity of the meteors is not real. The number of apparent hyperbolic orbits increases inversely proportional to the difference between the mean heliocentric velocity of meteor shower and the parabolic velocity limit. The number of hyperbolic meteors in the investigated catalogues does not, in any case, represent the number of interstellar meteors in observational data. The apparent hyperbolicity of these orbits is caused by a high spread in velocity determination, shifting a part of the data through the parabolic limit.

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