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HIP 15549 — Star in Aries

Magnitude 4.5m Star Aries (Ari) Visible
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1Physical Properties

Magnitude 4.47
Spectral Type K2II-III bright giant
Star Color Red (B-V 1.55)

2Position & Identifiers

RA 03h 20m 20.4s
Dec +29° 02' 54.0"
Constellation Aries (Ari)
HR 999
HIP 15549
HD 20644
SAO 75871
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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Compare Stars

9

Spectral Classification

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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

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 1156
Hard+
Galaxy
Galaxy mag 11.7 6.0° Aries
M45
Pleiades, Seven Sisters or Subaru
Easy
Open cluster
Open Cluster mag 1.6 7.8° Taurus
Show on Map

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