Epsilon Cep
HIP 109857; Epsilon Cep; 23 Cep
DoubleStar
Cep
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.19
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F0IV
Star Color
Yellow-white
(B-V 0.28)
Distance
79.5 ly
Position & Identifiers
RA
22h 15m 02.0s
Dec
+57° 02' 37.0"
Constellation
Cep
HR
8494
HIP
109857
Bayer
Epsilon
Flamsteed
23 Cep
Variable ID
Eps Cep
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Visibility
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Multiple Star System
Separation
118.1″
Companion Mag
9.2
Companion Sp
M0
Position Angle
356°
Star Colors
A: Yellow-white
B: Red
Discoverer
ENG 84
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 118.1″ · PA: 356° · 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
Delta Sct 4.15 - 4.20V, 0.04242 and 0.068073d. Period and amp. vary.
RV amp. greater than expected for light variation.
Survey Image
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