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Maia

20 Tau

HIP 17573; 20 Tau DoubleStar Tau Visible Level 3 Medium telescope (6-8") - Requires steady seeing
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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

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
N E 73° A (3.9) B (13.7)

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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