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HIP 70054 — Double Star in Lupus

Observable Double Star Good (53/100)

Sep: 3.5", Companion: mag 7.9

Magnitude 5.6m DoubleStar Lupus (Lup) Visible
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Observe

1Physical Properties

Magnitude 5.56
Spectral Type G8III giant
Star Color Orange (B-V 0.92)

2Position & Identifiers

RA 14h 20m 09.7s
Dec -43° 03' 32.0"
Constellation Lupus (Lup)
HR 5362
HIP 70054
HD 125383
SAO 224838

3How easy to split?

Primary 5.6 mag Companion 7.9 mag Separation 3.5″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Medium Medium Medium
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 Mar – May (peak: Apr)

5Multiple Star System

Separation 3.5″
Companion Mag 7.9
Position Angle 301°
Star Colors A: Orange
Discoverer HJ 4672

Separation over time

Measured 1837 → 2016 (179 y)
Separation drift 3.0" → 3.5" (+0.50")
Rate +0.0028" / y
PA drift 302° → 301° (-1°, -0.006°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

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 301°

A: 5.6 · B: 7.9 · Sep: 3.5″ · PA: 301° · 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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