Maia
20 Tau
HIP 17573; 20 Tau
DoubleStar
Tau
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.87
Spectral Type
B6.5III
Star Color
Blue-white
(B-V -0.07)
Distance
399.1 ly
Position & Identifiers
RA
03h 45m 49.6s
Dec
+24° 22' 04.0"
Constellation
Tau
HR
1149
HIP
17573
Flamsteed
20 Tau
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Visibility
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Multiple Star System
Separation
113.4″
Companion Mag
13.7
Position Angle
73°
Star Colors
A: Blue-white
B: Yellow-white
Discoverer
HL 11
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 113.4″ · PA: 73° · 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
Probably cst. Var. helium lines.
Sep. 0.003". Unresolved by speckle interferometry 1981.69. Duplicity questioned.
Color excess E(B-V) = +0.02.
Pleiades cluster; Mel 22 #785; in reflection nebula. Pleiades nebula. Member assoc. Tau R1 at 110 pc.
C1 neutral carbon continuum shows discontinuities in UV.
Maia.
Survey Image
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