When is the best time to observe Kappa Coronae Australis?

Kappa Coronae Australis is best observed from May through July, with peak visibility during June when it transits around midnight in the Northern Hemisphere.

Where is Kappa Coronae Australis located in the sky?

Kappa Coronae Australis lies in the constellation Corona Australis at right ascension 18h 33m and declination -38° 44′.

What telescope do I need to split Kappa Coronae Australis?

Splitting Kappa Coronae Australis requires an aperture of roughly 60 mm or larger — the components are separated by about 20.5″ at magnitudes near 5.7. Larger apertures and steady seeing help resolve the pair cleanly.

Kappa Coronae Australis — Double Star in Corona Australis

HIP 90968; Kappa2 Coronae Australis

Observable Double Star Excellent (62/100)

Sep: 20.5", Companion: mag 6.2

Magnitude 5.7^m DoubleStar Corona Australis (CrA) Visible

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Observe

1Physical Properties

Magnitude 5.65

Spectral Type B9V

Star Color Blue-white (B-V -0.06)

2Position & Identifiers

RA 18h 33m 23.1s

Dec -38° 43' 34.0"

Constellation Corona Australis (CrA)

HR 6953

HIP 90968

HD 170867

SAO 210295

Bayer Kappa2

SIMBAD Wikipedia

3How easy to split?

Primary 5.7 mag Companion 6.2 mag Separation 20.5″

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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

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Best season May – Jul (peak: Jun)

5Multiple Star System

Separation 20.5″

Companion Mag 6.2

Companion Sp A0III

Position Angle 359°

Star Colors A: Blue-white B: Blue-white

Discoverer DUN 222

Notes

CPM with HR 6952.

Separation over time

Measured 1836 → 2018 (182 y)

Separation drift 30.0" → 20.5" (-9.50")

Rate -0.0522" / y

PA drift 0° → 359° (-1°, -0.005°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.