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HIP 83216 — Double Star in Ara

Magnitude 6.0m DoubleStar Ara Visible
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1Physical Properties

Magnitude 6.00
Spectral Type G8-K0III+G
Star Color Orange (B-V 0.88)

2Position & Identifiers

RA 17h 00m 27.1s
Dec -48° 38' 52.0"
Constellation Ara
HR 6300
HIP 83216
HD 153221
SAO 227542

3How easy to split?

Primary 6.0 mag Companion 7.7 mag Separation 1.0″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard+ V. hard+ V. hard+
150mm Newt. Hard Hard Hard
C8 203mm Hard+ Hard+ Hard+
Easy Medium Hard Very hard Impossible

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

To reach "Medium" at Bortle 3, you'd need at least a 220 mm reflector.

4Visibility

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Best season May – Jul (peak: Jun)

5Multiple Star System

Separation 1.0″
Companion Mag 7.7
Position Angle 173°
Star Colors A: Orange
Discoverer SEE 316

Separation over time

Measured 1897 → 2016 (119 y)
Separation drift 0.50" → 1.0" (+0.50")
Rate +0.0042" / y
PA drift 179° → 173° (-6°, -0.050°/y)

Slow change over generations — observable in lifetime comparisons.

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 173°

A: 6.0 · B: 7.7 · Sep: 1.0″ · PA: 173° · N up, E right

Unresolved · 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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