Octans

When and where to look for Octans

Octans crosses the meridian — its highest point in the sky — at local midnight around July, which makes the months from June to August the easiest time to find it in the evening. It spans declinations -83.7° to -77.4°, so visible from everywhere south of about 6°N.

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

Brightest stars in Octans

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

What Octans is made of

The catalogue lists 60 stars within Octans, of which 60 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

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 Nu Oct at 69.1 light years. The most distant is Pi 2Oct at roughly 1,953 light years — stars that appear side by side here are nothing of the sort.