irregular variable star

irregular variable star

[i′reg·yə·lər ¦ver·ē·ə·bəl ′stär]
(astronomy)
A star with no fixed period.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Alpha ([alpha]) Cassiopeiae is officially the constellation's brightest star at magnitude 2.24, although nearby Gamma ([gamma]) Cas is an eruptive, irregular variable star that sometimes outshines it.
Hind's Variable Nebula is usually visible as two or three faint arcs of nebulosity about 40" west or southwest of the irregular variable star, T Tauri, which varies erratically between magnitude 9 and 13.
Scan 7 1/2[degrees] east of Alkaid, into the northwestern corner of Bootes, where you'll find the irregular variable star CH Bootis, which fluctuates between magnitudes 5.7 and 5.9.
A subtle cometlike patch of nebulosity, C68 is lit by the irregular variable star R Coronae Australis.
In 1908 the programme consisted of 5 Algol, 9 short-period, 27 long-period and 9 irregular variable stars. This programme was to remain largely in place for the following thirty years, ensuring excellent coverage for the stars selected.