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HIP 21239

HIP 21239 DoubleStar Eri Visible Level 6 Professional/Research - Requires steady seeing
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Physical Properties

Magnitude 6.06
Spectral Type K0
Star Color Red (B-V 1.38)

Position & Identifiers

RA 04h 33m 22.0s
Dec -10° 47' 09.0"
Constellation Eri
HR 1447
HIP 21239

Visibility

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Multiple Star System

Separation 0.6″
Companion Mag 10.1
Position Angle 91°
Star Colors A: Red
Discoverer HDS 592

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 91° A (6.1) B (10.1)

Sep: 0.6″ · PA: 91° · 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

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

Survey Image

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