69 Cyg
HIP 105811; 69 Cyg
DoubleStar
Cyg
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.94
Spectral Type
B0Ib
Star Color
Blue-white
(B-V -0.08)
Position & Identifiers
RA
21h 25m 47.0s
Dec
+36° 40' 03.0"
Constellation
Cyg
HR
8209
HIP
105811
Flamsteed
69 Cyg
Double Cat
14969
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Visibility
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Multiple Star System
Components
3
Component IDs
AC
Separation
34.5″
Companion Mag
11.7
Position Angle
28°
Star Colors
A: Blue-white
Discoverer
S 790
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 34.5″ · PA: 28° · 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 Fusion
Stellar Notes
ADS 14969A. Companions optical. B 12.06V, +1.13(B-V), 33". C 10.38V, +0.46(B-V), -0.04(U-B), F5V, 54", vsini =<54k/s. | Components B and C sometimes interchanged.
Cyg OB4.
Nitrogen deficient.
Survey Image
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