Alpha Dor
HIP 21281; Alpha Dor
DoubleStar
Dor
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
3.27
Range
3.24 - 3.28
Period
2.9 days
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B7V
Star Color
Blue-white
(B-V -0.10)
Distance
169 ly
Position & Identifiers
RA
04h 33m 59.8s
Dec
-55° 02' 42.0"
Constellation
Dor
HR
1465
HIP
21281
Bayer
Alpha
Variable ID
Alp Dor
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Visibility
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Light Curve
Multiple Star System
Components
3
Separation
0.2″
Companion Mag
4.6
Position Angle
115°
Star Colors
A: Blue-white
B: White
Discoverer
B 2092
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
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Stellar Fusion
Stellar Notes
Alpha CV 3.26 - 3.30V, amp. 0.10u, 2.943d.
3.8 A0IIIp, 4.3 B9IV, 13.00y, a = 0.212". Combined mag., colors. Companion 10v at 78" optical.
Member of Pleiades group.
Survey Image
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