HIP 102431
HIP 102431
DoubleStar
Cep
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.51
Spectral Type
F8IV-V
Star Color
Yellow
(B-V 0.54)
Distance
70.9 ly
Position & Identifiers
RA
20h 45m 21.1s
Dec
+57° 34' 47.0"
Constellation
Cep
HR
7955
HIP
102431
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Visibility
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Multiple Star System
Separation
48.4″
Companion Mag
9.9
Companion Sp
F9
Position Angle
146°
Star Colors
A: Yellow
B: Yellow
Discoverer
ENG 76
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 48.4″ · PA: 146° · 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
B is BD+57d2241, optical.
Labelled Upsilon Cep in Burritt's Atlas, not confirmed elsewhere. It is not the double star described by Allen as | Castula, Upsilon1,2 Cep.
Survey Image
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