Menu

HIP 15305 — Star in Horologium

Magnitude 5.8m Star Horologium (Hor) Visible
Star Map
+ List + Plan Star Hop

Observe

1Physical Properties

Magnitude 5.85
Spectral Type K2III giant
Star Color Red (B-V 1.24)

2Position & Identifiers

RA 03h 17m 26.6s
Dec -47° 45' 06.0"
Constellation Horologium (Hor)
HR 998
HIP 15305
HD 20640
SAO 216246
SIMBAD

3How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
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

Set a location in User Settings to see visibility data.

Best season Oct – Dec (peak: Nov)

5Survey Image

Loading survey image…

Explore

6

Size Comparison

Querying VizieR for stellar data…
7

Compare Stars

8

Spectral Classification

9

Hertzsprung-Russell Diagram

Loading HR diagram…
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.

NGC 1433
Hard+
Barred spiral galaxy
Galaxy mag 10.0 4.2° Horologium
C87
NGC 1261
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.4 7.5° Horologium
Theta Eri
HIP 13847; Theta2 Eridani
Easy
Easy double, sep 8.3″
Double Star mag 4.35 8.2° Eridanus
TW Hor
Hard+
Semi-regular variable, range 5.5–6.0
Variable Star mag 5.74 9.6° Horologium
Show on Map

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

Arthur Eddington
1919 eclipse expedition confirming general relativity; first theory of stellar interiors; the Eddington limit
Biography
Horologium
Mythology, bright stars, and deep-sky highlights.
Constellation
The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
}