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HIP 89115 — Star in Apus

Magnitude 5.9m Star Apus (Aps) Visible
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1Physical Properties

Magnitude 5.86
Spectral Type K2III giant
Star Color Red (B-V 1.24)
Distance 204 ly

2Position & Identifiers

RA 18h 11m 15.7s
Dec -75° 53' 29.0"
Constellation Apus (Aps)
HR 6731
HIP 89115
HD 164712
SAO 257569
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 May – Jul (peak: Jun)

5Survey Image

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6

Size Comparison

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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

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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.

IC 4654
Hard+
Bright spiral galaxy
Galaxy mag 12.30 2.7° Apus
Delta Aps
HIP 80047; Delta1 Apodis
Easy
Cool red giant
Star mag 4.68 6.6° Apus
C107
NGC 6101
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 9.3 8.0° Apus
Kappa Pav
Medium+
Variable star, range 3.9–4.8
Variable Star mag 4.44 9.3° Pavo
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