80 Tau

Observable Double Star Fair (21/100)

Sep: 1.3", Companion: mag 8.1

HIP 20995; 80 Tau DoubleStar Tau Visible Level 5 Expert level - Requires steady seeing

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Physical Properties

Magnitude 5.58

Spectral Type F0V

Star Color Yellow-white (B-V 0.32)

Distance 105 ly

Position & Identifiers

RA 04h 30m 08.6s

Dec +15° 38' 17.0"

Constellation Tau

HR 1422

HIP 20995

Flamsteed 80 Tau

Double Cat 3264

Visibility

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Multiple Star System

Separation 1.3″

Companion Mag 8.1

Companion Sp G0V

Position Angle 17°

Star Colors A: Yellow-white B: Yellow

Discoverer STF 554

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 1.3″ · PA: 17° · 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

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Stellar Fusion

Stellar Notes

Double Star

5.7 F0V, 7.98 G2V, 189.5y, a = 1.01" (alternates 180.0y, a = 1.00"; 170y, a = 1.029"). Combined mass 2.82 solar. | Speckle interferometric sep. 1.300" (1980.94).

Spectroscopic Binary

ADS 3264A, 30.5d.

Group/Cluster

In Hyades cluster; Mel 25 #80.

Dynamical

0.022".

Survey Image

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