NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Planet-crossing asteroid surveyThe 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.
Document ID
19840017512
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wilder, P. D.
(State Univ. Coll. Geneseo, N.Y., United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1984
Publication Information
Publication: NASA, Washington Advan. in Planetary Geol.
Subject Category
Lunar And Planetary Exploration
Accession Number
84N25580
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available