Eta Cen
HIP 71352; Eta Cen
Star
Cen
Visible
Level 1
Naked eye / Binoculars
Physical Properties
Magnitude
2.31
Range
2.29 - 2.47
Period
15.4 hours
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B1.5 VN
Star Color
Blue
(B-V -0.19)
Distance
306 ly
Position & Identifiers
RA
14h 35m 30.4s
Dec
-42° 09' 28.0"
Constellation
Cen
HR
5440
HIP
71352
Bayer
Eta
Variable ID
Eta Cen
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Stellar Notes
Gamma Cas 2.30 - 2.41V, 1.83 - 1.95p. H alpha variable, H beta sometimes bright, sometimes dark and double or | multiple. Variability shows evidence of mass loss. Amp. 0.07V on time scale 1d suspected.
Innes catalogue indicated a faint companion at 6" in 1897, not subsequently seen.
Probably the primary of visual optical pair.
Member of the local association (Pleiades group); Sco-Cen assoc.
Shell star.
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