A procedure of selection of meteors from major streams for determination of mean orbits |
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Authors: | L. Neslušan J. Svoreň V. Porubčan |
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Affiliation: | (1) Astronomical Institute, Slovak Academy of Sciences, SK-059 6O Tatranská Lomnica, The Slovak Republic;(2) Astronomical Institute, Slovak Academy of Sciences, SK-842 28 Bratislava, The Slovak Republic |
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Abstract: | A procedure of selection of meteoroids from major streams is suggested and applied to the IAU Lund photographic database modified by a check for internal consistency among orbital elements (3411 orbits). Limits for choice of stream members were defined by break points on the plots of the cumulative numberNC vs. the Southworth-HawkinsD discriminant. For the break points were considered the points from which the dependenceNC vs.D changes to a quasi-linear one, and with the increasingD, NC changes only moderately. Except for the Taurids which desire a separate analysis, theNC vs.D diagrams are presented for the following major meteoroid streams: Quadrantids, Lyrids, Aquarids, Capricornids, N and S Aquarids, Perseids, Orionids, Leonids and Geminids. The mean orbits, velocities and radiants of the streams are derived and compared with the osculating orbits of their parent bodies. The limitingDB was found to be a function of the number of the stream membersNCB. Omitting the exceptionally concentrated Geminids, the relation is in the formDB = 0.058 *ln(NCB) – 0.04. |
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Keywords: | Meteoroid Streams Meteor Orbits Sporadic Background D-criterion |
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