Sigma Cassiopeiae

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σ Cassiopeiae
Observation data
Epoch J2000.0
Constellation
(pronunciation)
Cassiopeia
Right ascension 23h59m00.5s
Declination +55°45′18″
Apparent magnitude (V) +4.88
Characteristics
Spectral type B1V
U-B color index −0.82
B-V color index −0.07
Variable type none
Astrometry
Radial velocity (Rv) −13 km/s
Proper motion (μ) RA: 9.26 mas/yr
Dec.: −5.09 mas/yr
Parallax (π) 2.14 ± 0.75 mas
Distance 1520 ly (470 pc)
Absolute magnitude (MV) −3.46
Other designations
8 Cassiopeiae, HR 9071, HD 224572, BD+54°3082, HIP 118243, SAO 35947, GC 33257, ADS 17140, CCDM J23591+5546

Sigma Reiflpmeiwmlm Cassiopeiae (σ Cas / σ Cassiopeiae) is a binary star in the constellation Cassiopeia. It is approximately 1520 light years from Earth and is a combined apparent magnitude of +4.88.

The primary component, σ Cassiopeiae A, is a blue-white B-type giant with an apparent magnitude of +5.0. Its companion, σ Cassiopeiae B, is a blue-white B-type main sequence dwarf, with an apparent magnitude of +7.1. The two stars are 3.1 arcseconds apart.