Eta Cep
HIP 102422; Eta Cep; 3 Cep
DoubleStar
Cep
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.43
Spectral Type
K0IV
Star Color
Orange
(B-V 0.92)
Distance
45.9 ly
Position & Identifiers
RA
20h 45m 17.4s
Dec
+61° 50' 20.0"
Constellation
Cep
HR
7957
HIP
102422
Bayer
Eta
Flamsteed
3 Cep
Double Cat
14276
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Visibility
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Multiple Star System
Separation
42.4″
Companion Mag
11.3
Position Angle
103°
Star Colors
A: Orange
Discoverer
BU 1493
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 42.4″ · PA: 103° · 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
Eta Cep group.
Survey Image
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