Alrai
HIP 116727; Gamma Cep; 35 Cep
Fair (24/100)
HIP 116727; Gamma Cep; 35 Cep
DoubleStar
Cepheus
(Cep)
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
3.21
Spectral Type
K1III
Star Color
Orange
(B-V 1.03)
Distance
46 ly
Position & Identifiers
RA
23h 39m 20.8s
Dec
+77° 37' 57.0"
Constellation
Cepheus
(Cep)
HR
8974
HIP
116727
Bayer
Gamma
Flamsteed
35 Cep
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Visibility
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Multiple Star System
Separation
1.8″
Companion Mag
7.3
Position Angle
215°
Star Colors
A: Orange
Discoverer
NHR 9
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.8″ · PA: 215° · N up, E left
Unresolved · 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
Exoplanets
1 known planet
| Planet | Radius | Mass | Period | Distance |
|---|---|---|---|---|
| gam Cep b | 12.70R⊕ | 6.60M♃ | 2.5yr | 46ly |
Habitable Zone
Size & Mass Comparison
Stellar Notes
Alrai; Arrai; Errai; Er Rai.
Light Travel Time Machine
Relativistic Travel
Survey Image
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