75 Cyg
HIP 106999; 75 Cyg
DoubleStar
Cyg
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
5.11
Spectral Type
M1IIIab
Star Color
Red
(B-V 1.60)
Distance
815.4 ly
Position & Identifiers
RA
21h 40m 11.1s
Dec
+43° 16' 26.0"
Constellation
Cyg
HR
8284
HIP
106999
Flamsteed
75 Cyg
Double Cat
15208
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Visibility
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Multiple Star System
Components
3
Component IDs
AC
Separation
2.7″
Companion Mag
10.1
Position Angle
329°
Star Colors
A: Red
Discoverer
AC 20
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 2.7″ · PA: 329° · N up, E left
At limit · 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
AB binary. B, 10.5v at 3". Component C, optical.
0.007".
Survey Image
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