Tags: Star.

G117-B15A is a small well-observed variable white dwarf star of the DAV or ZZ Ceti type in the constellation of Leo Minor.G117-B15A was found to be variable in 1974 by Richer and Ulrych and this was confirmed in 1976 by McGraw and Robinson. In 1984 it was demonstrated that the star’s variability is due to nonradial gravity wave pulsations.

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