Zeta Cyg
HIP 104732; Zeta Cyg; 64 Cyg
DoubleStar
Cyg
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.20
Spectral Type
G8+ IIIa Ba0.5
Star Color
Orange
(B-V 0.99)
Distance
143.1 ly
Position & Identifiers
RA
21h 12m 56.2s
Dec
+30° 13' 37.0"
Constellation
Cyg
HR
8115
HIP
104732
Bayer
Zeta
Flamsteed
64 Cyg
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Visibility
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Multiple Star System
Components
4
Component IDs
AC
Separation
65.2″
Companion Mag
11.7
Companion Sp
DA4
Position Angle
205°
Star Colors
A: Orange
Discoverer
BUP 227
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 65.2″ · PA: 205° · 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
White dwarf companion.
Survey Image
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