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HIP 72308 — Double Star in Lupus

Magnitude 6.1m DoubleStar Lupus (Lup) Visible
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1Physical Properties

Magnitude 6.07
Spectral Type A1III-IV giant
Star Color White (B-V 0.09)

2Position & Identifiers

RA 14h 47m 12.3s
Dec -52° 12' 20.0"
Constellation Lupus (Lup)
HR 5498
HIP 72308
HD 129932
SAO 241995

3How easy to split?

Primary 6.1 mag Companion 11.0 mag Separation 39.2″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard+ Hard V. hard+
150mm Newt. Medium+ Medium+ Medium
C8 203mm Easy Medium+ Medium+
Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Mar – May (peak: Apr)

5Multiple Star System

Separation 39.2″
Companion Mag 11.0
Position Angle 290°
Star Colors A: White B: Orange
Discoverer HDO 240

Separation over time

Measured 1891 → 2015 (124 y)
Separation drift 30.0" → 39.2" (+9.20")
Rate +0.0742" / y
PA drift 280° → 290° (+10°, +0.081°/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 290°

A: 6.1 · B: 11.0 · Sep: 39.2″ · PA: 290° · 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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