Tags: Star.

YZ Cassiopeiae (21 Cas) is a star system 89 parsecs (290 light years) away from Earth in the constellation Cassiopeia. It comprises three stars: an eclipsing Algol-type binary and a visually fainter star about 3000 AU distant.The primary star in the YZ Cassiopeiae system is a white subgiant (main sequence) star of spectral type A1m and 2.31 solar masses with a less massive main sequence dwarf star of type F2V and 1.35 solar masses.

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