Eta Cep
HIP 102422; Eta Cep; 3 Cep
DoubleStar
Cepheus
(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
46 ly
Position & Identifiers
RA
20h 45m 17.4s
Dec
+61° 50' 20.0"
Constellation
Cepheus
(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: 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
Eta Cep group.
Light Travel Time Machine
Relativistic Travel
Survey Image
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