The use of radar observations of Near-Earth Asteroids in the determination of the dynamical equinox

Details The use of radar observations of Near-Earth Asteroids in the determination of the dynamical equinox The use of radar observations of Near-Earth Asteroids in the determination of the dynamical equinox

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cemda..80..195y&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, v. 80, Issue 3/4, p. 195-203 (2001).

Astronomy and Astrophysics

Astronomy

1

Near-Earth Asteroid (Nea), Radar/Optical Observations, Dynamical Equinox, Hipparcos System

Scientific paper

Near-Earth Asteroids (NEAs) are Solar system special class objects attracting the attention of astronomical community especially during several of the last decades. To some extent the NEAs have an advantage over the minor planets of the main belt: due to close and regular approaches to the Earth the radar observations of NEAs can be obtained for the greater number of objects than for those of the main belt of the minor planets. In this paper the use of all available radar observations together with optical ones resulting in the combined data analysis solution is discussed for different problems such as the asteroid orbits and catalog orientation parameters determination. In particular the problem of the motion of the dynamical equinox in the Hipparcos reference system is considered. About 13000 radar and optical observations of 24 NEAs and main belt minor planets have been used to obtain the precise asteroid orbits, FK5 catalogue orientation parameters and the motion of the dynamical equinox from 1750 till 2000 in the Hipparcos system.

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