The image was flipped into a more commonly displayed orientation and slightly reprocessed to bring out more subtle detail and colour.

The small galaxy below M31 is Messier 110 (M110, NGC 205). The tiny galaxy immediately adjacent (above) Andromeda is M32.

Nikon D7200 (unmodified); Sky-Watcher ED80 Pro Refractor and a Tele Vue 0.8x Reducer/Flattener @ 480mm / f/6; ISO 800; Celestron AVX mount; guided with SSAG; and PHD2; 38 x 5 minute subs (total integration is 190 minutes; 3 hours and 10 minutes).

Shot in RAW (NEF); stacked using Pixinsight (Calibration Bias, Dark and Flats were used); processed in Pixinsight and Photoshop CC.