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Kappa Volantis — Double Star in Volans

HIP 40817; Kappa1 Volantis

Observable Double Star Excellent (61/100)

Sep: 64.0", Companion: mag 5.6

Magnitude 5.4m DoubleStar Volans (Vol) Visible
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Observe

1Physical Properties

Magnitude 5.37
Spectral Type B9III-IV giant
Star Color Blue-white (B-V -0.06)

2Position & Identifiers

RA 08h 19m 49.0s
Dec -71° 30' 54.0"
Constellation Volans (Vol)
HR 3301
HIP 40817
HD 71046
SAO 256497
Bayer Kappa1

3How easy to split?

Primary 5.4 mag Companion 5.6 mag Separation 64.0″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Easy Easy Easy
150mm Newt. Easy Easy Easy
C8 203mm Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Dec – Feb (peak: Jan)

5Multiple Star System Triple C: optical

Components 3 (triple)
Component IDs AB
Separation 64.0″
Companion Mag 5.6
Position Angle 58°
Star Colors A: Blue-white B: Blue-white
Discoverer BSO 17
CPM with HR 3302.

Separation over time

Measured 1835 → 2020 (185 y)
Separation drift 60.0" → 64.0" (+4.00")
Rate +0.0216" / y
PA drift 53° → 58° (+5°, +0.027°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 58°

A: 5.4 · B: 5.6 · Sep: 64.0″ · PA: 58° · N up, E right

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

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Size Comparison

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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Blackbody Spectrum

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Stellar Absorption Spectrum

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

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Stellar Fusion

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