Ara

Ara · genitive Arae · southern sky

The Ara figure as the IAU defines it, drawn looking south with east to the left — the orientation you see standing outside.

At a glance

Catalogued stars
72
Visible to the eye
72 stars
Brightest star
Bet Ara (2.84)
Best seen
June
Declination span
-60.7° to -49.9°
Nearest star
HD 156274 · 28.7 ly

Visible from everywhere south of about 29°N.

When and where to look for Ara

Ara crosses the meridian — its highest point in the sky — at local midnight around June, which makes the months from May to July the easiest time to find it in the evening. It spans declinations -60.7° to -49.9°, so visible from everywhere south of about 29°N.

The quickest way to find it is to open the live AR sky map and point your phone at the sky — if Ara is above your horizon right now, its figure is drawn in the position it genuinely occupies above you.

Brightest stars in Ara

StarMagTypeDistance
Bet Ara2.84K3Ib-II645.9 ly
Alp Ara2.84B2Vne267.3 ly
Zet Ara3.12K5III486.1 ly
Gam Ara3.31B1Ib1,113.2 ly
Del Ara3.60B8V197.9 ly
The Ara3.65B2Ib813.4 ly

Magnitude runs backwards: lower numbers are brighter, and anything below about 6.5 is beyond the naked eye under a dark sky.

What Ara is made of

The catalogue lists 72 stars within Ara, of which 72 are magnitude 6.5 or brighter — the limit of what an unaided eye picks up under a genuinely dark sky. The rest need binoculars or a telescope.

Spectral make-up

O1
B27
A14
F6
G8
K11
M5

Spectral class is a temperature ordering, running from O at around 30,000 K down to M below 3,500 K. A constellation is a direction, not a group, so this is simply what happens to lie along that line of sight.

The closest catalogued star in this direction is HD 156274 at 28.7 light years. The most distant is HD 157662 at roughly 2,965 light years — stars that appear side by side here are nothing of the sort.

Nearby constellations