R Eri

HIP 22881 DoubleStar Eridanus (Eri) Visible Level 6 Professional/Research - Requires steady seeing

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Physical Properties

Magnitude 5.72

Spectral Type gG4

Star Color Orange (B-V 0.88)

Position & Identifiers

RA 04h 55m 18.6s

Dec -16° 25' 04.0"

Constellation Eridanus (Eri)

HR 1581

HIP 22881

Variable ID R Eri

Visibility

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Multiple Star System

Separation 0.4″

Companion Mag 9.0

Position Angle 273°

Star Colors A: Orange

Discoverer HDS 635

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 0.4″ · PA: 273° · N up, E left

Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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

Variable Star

Cst? 5.72V.

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