irregular variable star

irregular variable star

[i′reg·yə·lər ¦ver·ē·ə·bəl ′stär]
(astronomy)
A star with no fixed period.
References in periodicals archive ?
In 1908 the programme consisted of 5 Algol, 9 short-period, 27 long-period and 9 irregular variable stars.
But perhaps the most important potential impact on astronomy is that it may convince observers that useful information can be extracted from the observations of irregular variable stars and that these stars thus deserve more attention than they have been getting," the team adds.