40 Tau
HIP 18957; 40 Tau
Star
Tau
Visible
Level 2
Small telescope (4")
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
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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
Eyepiece View
15x
Dawes: 1.9″
TFOV: 3.3°
Realistic = true angular size
Sep: 0.0″ · PA: 19° · N up, E left
Unresolved · 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
In HII region; Cas-Tau OB1.
Survey Image
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