When is the best time to observe Gamma Arae?

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

Where is Gamma Arae located in the sky?

Gamma Arae lies in the constellation Ara at right ascension 17h 25m and declination -56° 23′.

What telescope do I need to split Gamma Arae?

Splitting Gamma Arae requires an aperture of roughly 60 mm or larger — the components are separated by about 18.4″ at magnitudes near 3.3. The companion is about 6.9 magnitudes fainter, so glare from the primary — not separation — sets the minimum aperture. Larger apertures and steady seeing help resolve the pair cleanly.

Gamma Arae — Double Star in Ara

Magnitude 3.3^m DoubleStar Ara Visible

Star Map + List + Plan

About Gamma Ara

Description

Gamma Arae is a blue supergiant of spectral type B1Ib at magnitude 3.34 in Ara. Located about 1,140 light-years from Earth, it is intrinsically very luminous — roughly 57,000 times the Sun's luminosity. It is one of the more distant naked-eye stars in the southern sky.

Observing Tips

Gamma Ara lies in the southern part of the small constellation Ara. Despite its modest apparent brightness, it is a genuine supergiant. Only visible from the southern hemisphere and very low northern latitudes. Best observed June through August.

History

Gamma Arae has no traditional proper name. Its blue supergiant nature makes it a massive star that will end its life as a supernova within a few million years.

Fun Facts

Gamma Ara is over 1,000 light-years away yet still visible to the naked eye, a testament to its extraordinary intrinsic luminosity. It is one of the most luminous stars in the southern sky that is not widely known.

Observe

1Physical Properties

Magnitude 3.34

Spectral Type B1II bright giant

Star Color Blue-white (B-V -0.13)

Distance 1,109 ly

2Position & Identifiers

RA 17h 25m 23.6s

Dec -56° 22' 39.0"

Constellation Ara

HR 6462

HIP 85267

HD 157246

SAO 244726

Bayer Gamma

SIMBAD

3How easy to split?

Primary 3.3 mag Companion 10.2 mag Separation 18.4″

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard+	Hard+	Hard+
150 mm Newton 150mm Newt.	Easy	Medium+	Medium+
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 Triple C,D: optical

Components 3 (triple)

Component IDs AB

Separation 18.4″

Companion Mag 10.2

Position Angle 326°

Star Colors A: Blue-white

Discoverer HJ 4942

Notes

Component B, A7V; C is optical.

Separation over time

Measured 1835 → 2016 (181 y)

Separation drift 18.0" → 18.4" (+0.40")

Rate +0.0022" / y

PA drift 324° → 326° (+2°, +0.011°/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.