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31 Cas

Observable Double Star Good (53/100)

Sep: 25.0", Suspected visual double is probably single.

HIP 5518; 31 Cas DoubleStar Cas Visible Level 1 Naked eye / Binoculars - Requires steady seeing
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Physical Properties

Magnitude 5.29
Spectral Type A0Vnn
Star Color Blue-white (B-V -0.02)
Distance 191.9 ly

Position & Identifiers

RA 01h 10m 39.3s
Dec +68° 46' 43.0"
Constellation Cas
HR 336
HIP 5518
Flamsteed 31 Cas

Visibility

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Multiple Star System

Separation 25.0″
Position Angle -1°
Star Colors A: Blue-white
Discoverer H 4 16

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E A (5.3) B (7.3)

Sep: 25.0″ · 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

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

Stellar Notes

Suspected visual double is probably single.

Survey Image

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