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Mu Persei — Star in Perseus

Magnitude 4.1–4.2m Star Perseus (Per) Visible
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1Physical Properties

Magnitude 4.14
Spectral Type G0Ib supergiant
Star Color Orange (B-V 0.95)
Distance 192 ly

2Position & Identifiers

RA 04h 14m 53.9s
Dec +48° 24' 34.0"
Constellation Perseus (Per)
HR 1303
HIP 19812
HD 26630
SAO 39404
Bayer Mu
Flamsteed 51 Per
Double Cat 3071
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium+ Medium
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 Oct – Dec (peak: Nov)

5Survey Image

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Explore

7

Size Comparison

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8

Compare Stars

9

Spectral Classification

10

Hertzsprung-Russell Diagram

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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

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

14

Stellar Fusion

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15Stellar Notes

ADS 3071A, 4.1 - 4.24V.
A* 4.13 G0Ib, 0.778y, a = 0.019". AB CPM; B, 11.8v at 15". C , 10.25V, +0.47(B-V), +0.06(U-B), B8.
283.272d, K 20.7k/s, V0 +7.7k/s, asini 80.5. Unresolved by speckle interferometry.
16

Light Travel Time Machine

17

Relativistic Travel

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

NGC 1513
Easy
Open cluster
Open Cluster mag 8.4 1.4° Perseus
Show on Map

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