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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:22 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Determination of near earth objects associated with meteor streams based on their dynamic elements
Authors:
Bogdan Alexandru DUMITRU(1,2,3), Mirel BIRLAN(1), Mihai DIMA(2)
Affiliation:
1)Paris Observatory, Institute of celestial mechanics and the calculation of ephemeris
2)University of Bucharest, Faculty of Physics
3)Institute of Space Science
E-mail
bogdan.dumitru@spacescience.ro
Mirel.Birlan@obspm.fr
mihai@dmn.ro
Keywords:
meteor stream, asteroids, near earth object(NEA)
Abstract:
Meteor streams are composed of meteoroids (currently between 10 microns and 10 meters in diameter) resulted after expulsion/detachment processes from some initial bodies (comets or asteroids). In the solar system we can characterize any object by its dynamic elements (orbital elements). Considering the similarity between the orbital elements of meteor streams and parent bodies, most methods of investigation are based on the metrics obtained from oscillation elements of the parent bodies orbits. The most used method to measure the degree of similarity between the orbits of meteors and the parent bodies is the so-called "D criterion". This criterion was first proposed in 1963 by Southworth and Hawkins [1] who define the phase space as a 5 dimensional orthogonal coordinate system associating to each element a coordinate. Notations used in [1] to define the orbital elements are: q (perihelion distance), e (eccentricity), i (inclination), Ω (longitude of the ascending node), ω (argument of perihelion). The association between meteor streams and possible parent bodies is achieved by defining a limit values on the metric defined and statistical significance of the object class is thus determined.In this paper we present two methods based on D-criterion to determine the NEA (Near Earth Asteroids) that can be associated with various meteor showers. In the analysis were used orbital elements of about 600000 of asteroids from database of the IAU Minor Planet Data Center [2] and those of meteor showers from database IAU Meteor Data Center [3].
References:
[1] Southworth R. B., Hawkins G. S., 1963, Smithson. Contrib. Astrophys., 7, 261
[2] http://www.miorplanetcenter.net
[3] http://www.astro.amu.edu.pl/~jopek/MDC2007/
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