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Gamma Horologii — Star in Horologium

Magnitude 5.7m Star Horologium (Hor) Visible
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1Physical Properties

Magnitude 5.74
Spectral Type G8III-IV giant
Star Color Orange (B-V 0.93)

2Position & Identifiers

RA 02h 45m 27.5s
Dec -63° 42' 16.0"
Constellation Horologium (Hor)
HR 833
HIP 12871
HD 17504
SAO 248642
Bayer Gamma
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Hard+ Hard V. 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 Sep – Nov (peak: Oct)

5Survey Image

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Explore

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

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.

Zeta Ret
HIP 15371; Zeta2 Reticuli
Easy
Easy double, sep 309.1″
Double Star mag 5.24 3.9° Reticulum
NGC 1246
Hard
Elliptical galaxy
Galaxy mag 13.04 3.9° Horologium
TW Hor
Hard+
Semi-regular variable, range 5.5–6.0
Variable Star mag 5.74 7.2° Horologium
C87
NGC 1261
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.4 9.1° Horologium
Show on Map

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