Cetus

When and where to look for Cetus

Cetus crosses the meridian — its highest point in the sky — at local midnight around October, which makes the months from September to November the easiest time to find it in the evening. It spans declinations -18.0° to +10.1°, so best from the southern hemisphere; it rises for observers between about 80°S and 72°N.

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

Brightest stars in Cetus

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

What Cetus is made of

The catalogue lists 194 stars within Cetus, of which 194 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 52Tau Cet at 11.9 light years. The most distant is 3 Cet at roughly 2,091 light years — stars that appear side by side here are nothing of the sort.