Accession Number : AD0262469

Title :   THE MOTION OF SATELLITE 1958 EPSILON AROUND ITS CENTER OF MASS

Corporate Author : SMITHSONIAN ASTROPHYSICAL OBSERVATORY CAMBRIDGE MASS

Personal Author(s) : COLOMBO,G.

Report Date : 18 JUL 1961

Pagination or Media Count : 1

Abstract : A preliminary study is made of the motion of Explorer IV (Satellite 1958 Epsilon) around its center of mass. The body is, to a good approximation, symmetric around its longitudinal axis (A) and, therefore, the tangential motion can be considered a regular precession, at least during one orbital revolution. Many good observations of the motion, especially of the variation of (A), were made during the first 60 days after launch, and the variation in the direction of the precessional axis was computed. Although the determinations are not precise, they definitely indicate an angular displacement of the precessional axis of at least 10 degrees per day in the first 30 days after launch. Also, it is certain that the angular momentum of the body remained almost constant during the whole period under consideration. (Author)

Descriptors :   *ORBITS, DRAG, MOTION, NUMERICAL ANALYSIS, PERTURBATION THEORY, ROTATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE