Mahasim
Theta Aur
Observable Double Star
Excellent (63/100)
Sep: 3.7", Companion: mag 7.2
HIP 28380; Theta Aur; 37 Aur
DoubleStar
Aur
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
2.62
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B9IV
Star Color
Blue-white
(B-V -0.08)
Distance
165.6 ly
Position & Identifiers
RA
05h 59m 43.3s
Dec
+37° 12' 45.0"
Constellation
Aur
HR
2095
HIP
28380
Bayer
Theta
Flamsteed
37 Aur
Variable ID
The Aur
Double Cat
4566
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
3.7″
Companion Mag
7.2
Position Angle
302°
Star Colors
A: Blue-white
B: Yellow
Discoverer
STT 545
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.7″ · PA: 302° · 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 4566B. Alpha CV 2.62 - 2.70V. Amp. 0.43m at 1400A, 1.3735d. Magnetic field varies 3.618d.
AB binary , combined mag., colors. B is 7.2v G2V. C, 11v at 49" optical.
0.032".
Radius 3.3 solar.
Survey Image
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