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Eta Indi — Star in Indus

Magnitude 4.5m Star Indus (Ind) Visible
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1Physical Properties

Magnitude 4.51
Spectral Type A7III-IV-A9 giant
Star Color Yellow-white (B-V 0.27)
Distance 67 ly

2Position & Identifiers

RA 20h 44m 02.3s
Dec -51° 55' 16.0"
Constellation Indus (Ind)
HR 7920
HIP 102333
HD 197157
SAO 246709
Bayer Eta
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 Jun – Aug (peak: Jul)

5Survey Image

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6

Size Comparison

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7

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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.

NGC 7007
Hard+
Elliptical galaxy
Galaxy mag 13.0 3.3° Indus
Peacock
HIP 100751; Alpha Pavonis
Easy
Bright naked-eye star, mag 1.9
Star mag 1.94 5.5° Pavo
Theta Ind
Easy
Easy double, sep 7.3″
Double Star mag 4.39 5.6° Indus
T Ind
Medium
Semi-regular variable, range 5.8–6.5
Variable Star mag 6.00 9.1° Indus
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