Dwingeloo 2 is a companion galaxy of Dwingeloo 1.

Arp 56 is characterised by the presence of a small, bright companion galaxy with which it may be interacting.

Widening their search, the astronomers found a companion galaxy not far from the quasar, about 23,000 light-years away.

A feature of considerable added interest is the companion galaxy located at the end of one of the spiral arms.

M101 has also probably distorted the companion galaxy NGC 5474.

M101 and its companion galaxies comprise most or possibly all of the M101 Group.

It appears to have two satellite or companion galaxies.

Two of the objects are edge-on disk galaxies with smaller companion galaxies nearby.

The host galaxies mostly exhibit high ellipticities and a number have nearby companion galaxies.

NGC 4217 is a possible companion galaxy of Messier 106.