Delta Boo
Observable Double Star
Good (48/100)
Sep: 104.7", Companion: mag 7.9
HIP 74666; Delta Boo; 49 Boo
DoubleStar
Boo
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
3.47
Spectral Type
G8IV
Star Color
Orange
(B-V 0.95)
Distance
121.8 ly
Position & Identifiers
RA
15h 15m 30.2s
Dec
+33° 18' 53.0"
Constellation
Boo
HR
5681
HIP
74666
Bayer
Delta
Flamsteed
49 Boo
Double Cat
9559
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Visibility
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Multiple Star System
Separation
104.7″
Companion Mag
7.9
Companion Sp
G0V
Position Angle
78°
Star Colors
A: Orange
B: Yellow
Discoverer
STFA 27
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 104.7″ · PA: 78° · 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
CPM.
ADS 9559B, G0V, -12k/s.
Survey Image
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