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Xx pyxidis

The meaning of «xx pyxidis»

XX Pyxidis is a star located in the constellation Pyxis. It is one of the more-studied members of a class of stars known as Delta Scuti variables[2]—short period (six hours at most) pulsating stars that have been used as standard candles and as subjects to study astroseismology.[3] Astronomers made more sense of its pulsations when it became clear that it is also a binary star system. The main star is a white main sequence star of spectral type A4V that is around 1.85 ± 0.05 times as massive as the Sun. Its companion is most likely a red dwarf star of spectral type M3V, around 0.3 times as massive as the Sun. The two are very close—possibly only 3 times the diameter of the Sun between them—and orbit each other every 1.15 days. The brighter star is deformed into an egg-shape.[2]

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