commensurate orbits

commensurate orbits

[kə′mench·ə·rət ′or·bəts]
(astronomy)
Orbits of two celestial objects about a common center of gravity so that the period of one is a rational fraction of that of the other.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.