Zeta Cyg
HIP 104732; Zeta Cyg; 64 Cyg
DoubleStar
Cygnus
(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 ly
Position & Identifiers
RA
21h 12m 56.2s
Dec
+30° 13' 37.0"
Constellation
Cygnus
(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: 2.3″
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
White dwarf companion.
Light Travel Time Machine
Relativistic Travel
Survey Image
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