Theta Cassiopeiae

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θ Cassiopeiae
Observation data
Epoch J2000.0
Constellation Cassiopeia
Right ascension 01h11m06.2s
Declination +55°08′59″
Apparent magnitude (V) +4.34
Distance 137 ± 4 ly
(42 ± 1 pc)
Spectral type A7V
Other designations
Marfak, 33 Cassiopeiae, HR 343, HD 6961, BD+54°236, HIP 5542, SAO 22070, GC 1424, CCDM J01112+5508

Theta Cassiopeiae (θ Cas / θ Cassiopeiae) is a star in the constellation Cassiopeia. It also has the traditional name Marfark or Marfak, which it shares with μ Cassiopeiae.

θ Cassiopeiae is a white A-type main sequence dwarf with an apparent magnitude of +4.34. It is approximately 137 light years from Earth.


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