When is the best time to observe 24 Capricorni?

24 Capricorni is best observed from July through September, with peak visibility during August when it transits around midnight in the Northern Hemisphere.

Where is 24 Capricorni located in the sky?

24 Capricorni lies in the constellation Capricornus at right ascension 21h 07m and declination -25° 00′.

What telescope do I need to split 24 Capricorni?

Splitting 24 Capricorni requires an aperture of roughly 60 mm or larger — the components are separated by about 26.1″ at magnitudes near 4.5. The companion is about 7.2 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

24 Capricorni — Double Star in Capricornus

Magnitude 4.5^m DoubleStar Capricornus (Cap) Visible

Star Map + List + Plan

Observe

1Physical Properties

Magnitude 4.50

Spectral Type M0.5III giant

Star Color Red (B-V 1.61)

Distance 148 ly

2Position & Identifiers

RA 21h 07m 07.7s

Dec -25° 00' 21.0"

Constellation Capricornus (Cap)

HR 8080

HIP 104234

HD 200914

SAO 190025

Flamsteed 24 Cap

Double Cat 14632

SIMBAD

3How easy to split?

Primary 4.5 mag Companion 11.7 mag Separation 26.1″

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard	V. hard+	V. hard
150 mm Newton 150mm Newt.	Medium	Hard+	Hard
Celestron C8 (203 mm SCT) C8 203mm	Medium+	Medium	Medium

Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Jul – Sep (peak: Aug)

5Multiple Star System

Separation 26.1″

Companion Mag 11.7

Position Angle 185°

Star Colors A: Red

Discoverer SEE 439

Separation over time

Measured 1897 → 2016 (119 y)

Separation drift 26.4" → 26.1" (-0.30")

Rate -0.0025" / y

PA drift 186° → 185° (-1°, -0.008°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

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.