Sigma Boo
HIP 71284; Sigma Boo; 28 Boo
DoubleStar
Boo
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.46
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F2V
Star Color
Yellow-white
(B-V 0.36)
Distance
48.0 ly
Position & Identifiers
RA
14h 34m 40.8s
Dec
+29° 44' 42.0"
Constellation
Boo
HR
5447
HIP
71284
Bayer
Sigma
Flamsteed
28 Boo
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
212.8″
Companion Mag
10.7
Position Angle
86°
Star Colors
A: Yellow-white
Discoverer
STT 582
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 212.8″ · PA: 86° · 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
Delta Sct?
Survey Image
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