YZ Cassiopeiae (21 Cas) is a star system 89 parsecs 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 Cassiopeiae system is a white subgiant 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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dbpprop:abstract
  • YZ Cassiopeiae (21 Cas) is a star system 89 parsecs 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 Cassiopeiae system is a white subgiant 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. The apparent magnitude of the eclipsing binary varies from 5.65 to 6.05 with a period of 4.4672 days. Combined, they appear to have a spectral type of A2IV. The binary has a dimmer (magnitude 9.7 according to Norton, or 10.5 by SIMBAD) companion of 0.8 solar mass orbiting with a period of about 86580 years.
dbpprop:appmagV
  • 5.6/6.0
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  • 0.067 (xsd:double)
dbpprop:class
  • A2IV
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dbpprop:dec
dbpprop:epoch
  • J2000
dbpprop:name
  • TYC 4307-2168-1
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  • 0.55 (xsd:double)
dbpprop:parallax
  • 11.24 (xsd:double)
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  • 86580 (xsd:integer)
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  • -21.86 (xsd:double)
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  • -14.93 (xsd:double)
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dbpprop:radialV
  • +8.9±0.9
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  • +
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  • 17.063 (xsd:double)
  • 39.0777 (xsd:double)
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  • 74 (xsd:integer)
  • 290 (xsd:integer)
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rdfs:comment
  • YZ Cassiopeiae (21 Cas) is a star system 89 parsecs 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 Cassiopeiae system is a white subgiant 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.
rdfs:label
  • YZ Cassiopeiae
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