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Mu Muscae — Star in Musca

Magnitude 4.6–4.8m Star Musca (Mus) Visible
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1Physical Properties

Magnitude 4.72
Range 4.71 - 4.76
Period 180 days
Variable Type Slow Irregular Variable
Spectral Type K4III giant
Star Color Red (B-V 1.54)
Distance 251 ly

2Position & Identifiers

RA 11h 48m 14.3s
Dec -66° 48' 53.0"
Constellation Musca (Mus)
HR 4530
HIP 57581
HD 102584
SAO 251597
Bayer Mu
Variable ID Mu Mus

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium Hard+
50mm finder Easy Easy Easy
150mm scope Easy Easy Easy
Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Feb – Apr (peak: Mar)

5Survey Image

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6

Size Comparison

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7

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8

Spectral Classification

9

Hertzsprung-Russell Diagram

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10

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

Lb 4.6 - 4.8V.
15

Light Travel Time Machine

16

Relativistic Travel

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