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Mu Horologii — Star in Horologium

Magnitude 5.1m Star Horologium (Hor) Visible
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1Physical Properties

Magnitude 5.11
Spectral Type F0IV subgiant
Star Color Yellow-white (B-V 0.34)
Distance 130 ly

2Position & Identifiers

RA 03h 03m 36.8s
Dec -59° 44' 16.0"
Constellation Horologium (Hor)
HR 934
HIP 14240
HD 19319
SAO 232981
Bayer Mu
SIMBAD

3How easy to spot?

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

5Survey Image

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6

Size Comparison

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7

Compare Stars

8

Spectral Classification

9

Hertzsprung-Russell Diagram

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

Discover

14

Light Travel Time Machine

15

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.

TW Hor
Hard+
Semi-regular variable, range 5.5–6.0
Variable Star mag 5.74 2.7° Horologium
Zeta Ret
HIP 15371; Zeta2 Reticuli
Easy
Easy double, sep 309.1″
Double Star mag 5.24 3.3° Reticulum
C87
NGC 1261
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.4 4.7° Horologium
NGC 1249
Hard+
Barred spiral galaxy
Galaxy mag 12.0 6.5° Horologium
Show on Map

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