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HIP 50520 — Double Star in Carina

Observable Double Star Good (55/100)

Sep: 2.6", Companion: mag 6.5

Magnitude 5.7m DoubleStar Carina (Car) Visible
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Observe

1Physical Properties

Magnitude 5.67
Spectral Type A1V
Star Color White (B-V 0.05)

2Position & Identifiers

RA 10h 19m 04.8s
Dec -64° 40' 35.0"
Constellation Carina (Car)
HR 4065
HIP 50520
HD 89715
SAO 250917

3How easy to split?

Primary 5.7 mag Companion 6.5 mag Separation 2.6″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard+ Hard+ Hard+
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 Jan – Mar (peak: Feb)

5Multiple Star System

Separation 2.6″
Companion Mag 6.5
Position Angle 313°
Star Colors A: White B: Yellow-white
Discoverer HJ 4306
CPM? Combined mag., colors. Components A1V and A1Vn.

Separation over time

Measured 1836 → 2015 (179 y)
Separation drift 1.3" → 2.6" (+1.30")
Rate +0.0073" / y
PA drift 319° → 313° (-6°, -0.034°/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 313°

A: 5.7 · B: 6.5 · Sep: 2.6″ · PA: 313° · 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

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

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

13

Stellar Fusion

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14Stellar Notes

Component B, +19k/s.
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