Kappa Coronae Australis — Double Star in Corona Australis
HIP 90969; Kappa1 Coronae Australis
Observe
1Physical Properties
Magnitude
6.32
Spectral Type
A0III
giant
2Position & Identifiers
RA
18h 33m 23.3s
Dec
-38° 43' 13.0"
Constellation
Corona Australis
(CrA)
HR
6952
HIP
90969
HD
170868
SAO
210293
Bayer
Kappa1
Querying VizieR catalog...
3How easy to split?
Primary
6.3 mag
Companion
6.2 mag
Separation
21.4″
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Easy | Easy | Easy |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) C8 203mm | 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
May – Jul
(peak: Jun)
5Multiple Star System
Separation
21.4″
Companion Mag
6.2
Position Angle
359°
Star Colors
B: Blue-white
CPM with HR 6953.
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
A: 6.3 · B: 6.2 · Sep: 21.4″ · PA: 359° · N up, E right
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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6
Size Comparison
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7
Compare Stars
8
Spectral Classification
9
Hertzsprung-Russell Diagram
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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 double, sep 20.5″
Double Star
mag 5.65
0.0°
Corona Australis
Eta Sgr
Easy double, sep 3.5″
Double Star
mag 3.11
3.7°
Sagittarius
NGC 6723
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 7.3
5.6°
Sagittarius
RS Sgr
Eclipsing binary, period 2.4d
Variable Star
mag 6.16
5.6°
Sagittarius
C68
NGC 6729
Diffuse nebula
Diffuse Nebula
mag 10.0
5.9°
Corona Australis
Gamma CrA
HIP 93825; Gamma Coronae Australis
Tight double — a rewarding split at 1.6″
Double Star
mag 4.93
6.7°
Corona Australis
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