Radar astrometry of near-earth asteroids

Details Radar astrometry of near-earth asteroids Radar astrometry of near-earth asteroids

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94..189y&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, July 1987, p. 189-200.

Astronomy and Astrophysics

Astronomy

23

Asteroids, Astrometry, Earth Environment, Radar Astronomy, Ephemerides, Error Analysis, Visible Spectrum, Asteroids, Astrometry, Radar Methods, Ivar, Optical Properties, 1986Da, 1986Jk, 1982Db, Ephemerides, Calculations, Technique, Analysis, Data, Distance, Doppler Methods, Position (Location), Astronomy

Scientific paper

An uncertainty analysis is conducted for four asteroids with different optical and radar observation histories in order to ascertain the degree to which near-earth asteroid ephemerides can be improved by means of radar observations. For any given set of optical and radar observations and their associated errors, the angular and earth-asteroid distance uncertainties are calculated as functions of time through 2001. The radar data furnished only a small absolute improvement in such cases as that of 1627 Ivar, where a long history of optical astrometric data exists, but dramatic reductions in ephemeris uncertainties are obtainable for asteroids having only short optical data histories.

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