Eta Cen
Observable Variable Star
Good (55/100)
Range: 2.29 - 2.47, Period: 15.4h, Type: GCAS+LERI
HIP 71352; Eta Cen
VariableStar
Cen
Visible
Level 2
Small telescope (4") - Monitor brightness changes
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
305.5 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
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Light Curve
Comparison Stars for Eta Cen (2.3–2.4)
Nearby stable stars for estimating brightness (AAVSO)
Loading comparison stars…
Size Comparison
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
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.
Survey Image
Loading survey image…