Meteors in the IAU Meteor Data Center on Hyperbolic Orbits |
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Authors: | M Hajduková Jr |
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Institution: | (1) Astronomical Institute of the Slovak Academy of Sciences, 84504 Bratislava, Slovak Republic |
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Abstract: | 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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Keywords: | Meteoroid Meteor shower Hyperbolic Interstellar |
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