ESO 198-13 is a ring galaxy with multiple ring-like structures[2] located about 240 million light-years away[3] in the constellation Eridanus.

There is a small bright inner ring located close to the nucleus.

This feature has been interpreted as a nuclear ring due to being similar to the nuclear rings in a barred spiral galaxy (e.g. NGC 1512, NGC 4314).

Also this ring has a diameter of 15,527.12 light-years (4.76 kpc) which is larger than the average diameter of a nuclear ring (4,893 light-years/1.5 kpc).

It appears to be made of a very tightly wound spiral arm.