parallactic ellipseSee annual parallax.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
parallactic ellipse[¦par·ə¦lak·tik i′lips]
An annual apparent elliptical course of a celestial body on the celestial sphere about its mean position; caused by the elliptical orbital motion of the earth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.