Alpha Cae
HIP 21770; Alpha Cae
DoubleStar
Cae
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.45
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F2V
Star Color
Yellow-white
(B-V 0.34)
Distance
72.5 ly
Position & Identifiers
RA
04h 40m 33.7s
Dec
-41° 51' 50.0"
Constellation
Cae
HR
1502
HIP
21770
Bayer
Alpha
Variable ID
Var?
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Visibility
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Multiple Star System
Separation
7.5″
Companion Mag
12.5
Position Angle
137°
Star Colors
A: Yellow-white
Discoverer
HDO 190
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.5″ · PA: 137° · 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
Comp. A of double, Delta Sct?
CPM.
Survey Image
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