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40 Tau

HIP 18957; 40 Tau Star Tau Visible Level 2 Small telescope (4")
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Physical Properties

Magnitude 5.33
Spectral Type B3V
Star Color Blue-white (B-V -0.08)

Position & Identifiers

RA 04h 03m 44.6s
Dec +05° 26' 08.0"
Constellation Tau
HR 1253
HIP 18957
Flamsteed 40 Tau

Visibility

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Multiple Star System

Separation 0.0″
Companion Mag 6.2
Position Angle 19°
Star Colors A: Blue-white
Discoverer LSC 29

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

In HII region; Cas-Tau OB1.

Survey Image

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