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Theta Coronae Australis — Star in Corona Australis

Magnitude 4.6m Star Corona Australis (CrA) Visible
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1Physical Properties

Magnitude 4.64
Spectral Type G8III giant
Star Color Orange (B-V 1.01)

2Position & Identifiers

RA 18h 33m 30.2s
Dec -42° 18' 45.0"
Constellation Corona Australis (CrA)
HR 6951
HIP 90982
HD 170845
SAO 229111
Bayer Theta
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium 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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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.

Kappa CrA
HIP 90968; Kappa2 Coronae Australis
Easy
Easy double, sep 20.5″
Double Star mag 5.65 3.6° Corona Australis
C78
NGC 6541
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 6.6 4.9° Corona Australis
C68
NGC 6729
Hard+
Diffuse nebula
Diffuse Nebula mag 10.0 7.7° Corona Australis
NGC 6768
Hard+
Elliptical galaxy
Galaxy mag 12.85 8.4° Corona Australis
Show on Map

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