Mahasim
Theta Aur
Excellent (63/100)
HIP 28380; Theta Aur; 37 Aur
DoubleStar
Aur
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
2.62
Range
2.63 - 2.66
Period
3.6 days
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B9IV
Star Color
Blue-white
(B-V -0.08)
Distance
166 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
Querying VizieR catalog...
Visibility
Set a location in User Settings to see visibility data.
Light Curve
Multiple Star System C,D: optical
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
Querying VizieR for stellar data…
Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
Loading HR diagram…
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Fusion
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
Loading survey image…