Mu Cas
HIP 5336; Mu Cas; 30 Cas
DoubleStar
Cas
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.17
Spectral Type
G5Vb
Star Color
Orange
(B-V 0.69)
Distance
24.0 ly
Position & Identifiers
RA
01h 08m 16.4s
Dec
+54° 55' 13.0"
Constellation
Cas
HR
321
HIP
5336
Bayer
Mu
Flamsteed
30 Cas
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Visibility
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Multiple Star System
Components
6
Component IDs
AB
Separation
490.8″
Companion Mag
11.3
Companion Sp
dM
Position Angle
273°
Star Colors
A: Orange
B: Red
Discoverer
STT 551
Eyepiece View
15x
Dawes: 1.9″
TFOV: 3.3°
Realistic = true angular size
Sep: 490.8″ · PA: 273° · 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
A* 5.15 G5Vp, 21.43y, a = 0.186", mag. diff 2V, sep. 1.4". Subdwarf with five visual and one astrometric components.
8393d, K 2.8k/s, V0 -98.0k/s, asini 310. Masses 0.8 and 0.3? solar. Resolved by speckle interferometry.
Metal deficient star.
Marfak. Name shared with HR 343.
Survey Image
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