Tau Per
HIP 13531; Tau Per; 18 Per
Star
Per
Visible
Level 1
Naked eye / Binoculars
Physical Properties
Magnitude
3.95
Range
3.93 - 4.09
Period
1516 days
Variable Type
Eclipsing Binary (Algol-type)
Spectral Type
G4. III COMP
Star Color
Orange
(B-V 0.74)
Distance
254 ly
Position & Identifiers
RA
02h 54m 15.5s
Dec
+52° 45' 45.0"
Constellation
Per
HR
854
HIP
13531
Bayer
Tau
Flamsteed
18 Per
Variable ID
Tau Per
Double Cat
2202
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Visibility
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Light Curve
Multiple Star System optical
Components
4
Component IDs
AxBC
Separation
51.0″
Companion Mag
12.3
Companion Sp
A7V
Position Angle
107°
Star Colors
A: Orange
B: Yellow-white
Discoverer
EDG 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 Fusion
Stellar Notes
EA, 3.94 - 4.07V.
A* 4.06 G4III+A4V, 4.150y, a = 0.050". Speckle interferometric sep. 0.080" 1981.67. Circumstellar material surrounding | the pair? Visual companions 10.7v at 51" possibly physical; 11.8v at 4" possibly optical.
ADS 2202A, 1515.6d, K 19.0k/s, V0 +2.2k/s, asini 271. vsini of secondary 50k/s.
Survey Image
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