Epsilon UMi

HIP 82080; Epsilon UMi; 22 UMi DoubleStar UMi Visible Level 3 Medium telescope (6-8") - Requires steady seeing

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Physical Properties

Magnitude 4.23

Variable Type Eclipsing Binary (Algol-type)

Spectral Type G5III

Star Color Orange (B-V 0.89)

Distance 326.2 ly

Position & Identifiers

RA 16h 45m 58.1s

Dec +82° 02' 14.0"

Constellation UMi

HR 6322

HIP 82080

Bayer Epsilon

Flamsteed 22 UMi

Variable ID Eps UMi

Double Cat 10242

Visibility

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Multiple Star System

Separation 76.6″

Companion Mag 12.3

Position Angle 1°

Star Colors A: Orange

Discoverer HDO 143

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 76.6″ · PA: 1° · 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

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Stellar Notes

Variable Star

EA 4.22 - 4.28V, 39.4809d.

Spectroscopic Binary

39.4809d, K 31.8k/s, V0 -10.6k/s, asini 17.3.

Survey Image

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