V638 Cas
HIP 113797
DoubleStar
Cas
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
6.50
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B9IIIHe wk
Star Color
Blue-white
(B-V -0.08)
Position & Identifiers
RA
23h 02m 43.8s
Dec
+55° 14' 11.0"
Constellation
Cas
HR
8770
HIP
113797
Variable ID
V638 Cas
Double Cat
16474
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
18.6″
Companion Mag
10.2
Position Angle
49°
Star Colors
A: Blue-white
B: Yellow
Discoverer
STT 485
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 18.6″ · PA: 49° · 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
Alpha CV, amp. 0.10u, 5.36d. Spectrum variable.
Optical.
Survey Image
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