Theta Mus
Observable Double Star
Good (52/100)
Sep: 5.2", Companion: mag 7.5
HIP 64094; Theta Mus
DoubleStar
Mus
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.51
Spectral Type
B0Ia+WC5:
Star Color
Blue-white
(B-V -0.02)
Position & Identifiers
RA
13h 08m 07.0s
Dec
-65° 18' 23.0"
Constellation
Mus
HR
4952
HIP
64094
Bayer
Theta
Variable ID
The Mus
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Visibility
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Multiple Star System
Separation
5.2″
Companion Mag
7.5
Companion Sp
WC5:
Position Angle
184°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
RMK 16
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 5.2″ · PA: 184° · 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
E + WR 5.50 - 5.52V, 18.341d; UV, var. 1.5d.
CPM. vsini of secondary 110k/s.
18.341d, K 173k/s, msin3i 0.366, asini 43.6. Possibly third, unseen, companion orbiting the WR star.
Nebula R43.
H alpha emission star. One of only four WR stars bright enough to have been observed spectroscopically in UV by | COPERNICUS. Brightest of group of emission stars surrounding m Cen = HR 5041 in region of bright and dark neb. UV | spectrum dominated by supergiant companions. Variable emission lines.
Survey Image
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