Crater

When and where to look for Crater

Crater crosses the meridian — its highest point in the sky — at local midnight around March, which makes the months from February to April the easiest time to find it in the evening. It spans declinations -22.8° to -9.8°, so visible from everywhere south of about 67°N.

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

Brightest stars in Crater

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

What Crater is made of

The catalogue lists 33 stars within Crater, of which 33 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 15Gam Crt at 82.3 light years. The most distant is HD 101370 at roughly 688 light years — stars that appear side by side here are nothing of the sort.