Mu Cen
Observable Variable Star
Excellent (64/100)
Range: 2.85 - 3.55, Period: 8.2h, Type: GCAS
HIP 67472; Mu Cen
VariableStar
Cen
Visible
Level 1
Naked eye / Binoculars - Monitor brightness changes
Physical Properties
Magnitude
3.04
Range
2.85 - 3.55
Period
8.2 hours
Variable Type
Gamma Cassiopeiae (Eruptive Be Star)
Spectral Type
B2Vnep
Star Color
Blue
(B-V -0.17)
Distance
505.3 ly
Position & Identifiers
RA
13h 49m 37.0s
Dec
-42° 28' 26.0"
Constellation
Cen
HR
5193
HIP
67472
Bayer
Mu
Variable ID
Mu Cen
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Visibility
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Light Curve
Comparison Stars for Mu Cen (2.9–3.4)
Nearby stable stars for estimating brightness (AAVSO)
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Multiple Star System
Separation
45.5″
Companion Mag
13.0
Position Angle
127°
Star Colors
A: Blue
Discoverer
HDO 226
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 45.5″ · PA: 127° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Gamma Cas 2.92 - 3.43V, 3.535d. Variable H alpha. Expanding circumstellar shell. R and I mags. decreased by about | 0.3m between 1965 and 1983. Variable line profiles.
Companion F2V, optical.
Sco-Cen cluster; upper Cen group of Sco-Cen assoc.
Shell star. Line profiles of MgII 4481 change in period 0.505d, about five times the period of weaker absorption | features.
Survey Image
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