V639 Cas

HIP 274 DoubleStar Cas Visible Level 6 Professional/Research - Requires steady seeing

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Physical Properties

Magnitude 6.24

Spectral Type B3Ia

Star Color Yellow-white (B-V 0.33)

Position & Identifiers

RA 00h 03m 25.7s

Dec +63° 38' 31.0"

Constellation Cas

HR 9097

HIP 274

Variable ID V639 Cas

Visibility

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Multiple Star System

Separation 0.2″

Companion Mag 6.5

Position Angle 214°

Star Colors A: Yellow-white B: Yellow-white

Discoverer CHR 121

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 0.2″ · PA: 214° · 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.

Stellar Notes

Variable Star

I? Amp. 0.1B.

Group/Cluster

Cas OB5.

Survey Image

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