Planet-crossing asteroid survey

Details Planet-crossing asteroid survey Planet-crossing asteroid survey

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apg..book..208w&link_type=abstract

In NASA, Washington Advan. in Planetary Geol. p 208-211 (SEE N84-25567 15-91)

Computer Science

Asteroids, Intersections, Planetary Orbits, Planets, Earth (Planet), Mars (Planet), Photographic Plates, Photographs, Surveys, Telescopes

Scientific paper

The planet-crossing asteroid survey was begun in 1973 in order to study those asteroids which may intersect the orbits of the inner planets. Throughout the history of the survey, many of the various classes of asteroids were investigated. The near-Earth objects including the Apollo, Amor, and Aten families were studied in addition to asteroids whose orbits cross that of Mars, and some objects which are generally confined to the main belt. Observing was done on the 18 inch Schmidt telescope at the Palomar Mtn. Observatory. Typically, two consecutive photographs of a favorable field are taken. The exposure times of the films are usually twenty minutes and ten minutes, respectively. The telescope is guided at sidereal rate, so that asteroids will leave short trailed images. The films are then scanned for trails. By comparing the two films, the direction and approximate rate of motion of an asteroid may be determined.

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