19 Cep
HIP 109017; 19 Cep
DoubleStar
Cep
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.11
Spectral Type
O9.5Ib
Star Color
White
(B-V 0.08)
Position & Identifiers
RA
22h 05m 08.9s
Dec
+62° 16' 48.0"
Constellation
Cep
HR
8428
HIP
109017
Flamsteed
19 Cep
Double Cat
15624
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Visibility
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Multiple Star System
Components
3
Component IDs
AC
Separation
20.0″
Companion Mag
11.2
Position Angle
93°
Star Colors
A: White
Discoverer
BU 697
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 20.0″ · PA: 93° · 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
Companions optical: B, 11.6v at 20"; C 10.79V, +1.08(B-V), +0.75(U-B).
Cep OB2.
Also classified O9I.
Survey Image
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