HIP 107930
Observable Double Star
Excellent (67/100)
Sep: 17.6", Companion: mag 6.4
HIP 107930
DoubleStar
Cep
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
5.71
Variable Type
Beta Cephei (Pulsating)
Spectral Type
B6IV-V
Star Color
Blue-white
(B-V -0.13)
Distance
652.3 ly
Position & Identifiers
RA
21h 52m 01.0s
Dec
+55° 47' 49.0"
Constellation
Cep
HR
8357
HIP
107930
Double Cat
15405
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
17.6″
Companion Mag
6.4
Position Angle
197°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STF2840
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 17.6″ · PA: 197° · 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
ADS 15405A, Beta C?, 5.68 - 5.71V.
AB CPM. B is A1p Sr Si, vsini 60k/s. C, 13.2v at 55".
ADS 15405A, 17.3263d, K 108.3k/s, V0 -6.5k/s, msin3i 20.8, asini 25.2. Theta Aur type.
Cep OB2.
Survey Image
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