Andromeda XIX

[3] Andromeda XIX is considered "the most extended dwarf galaxy known in the Local Group",[4] and has been shown to have a half-light radius of 1.7 kiloparsec (kpc).

However, compared to dwarf galaxies of similar mass Andromeda XIX is extremely diffuse, like Antlia II.

[2] Surveillance was performed during use of the MegaPrime/MegaCam 1 deg2 (camera) on the Canada-France-Hawaii Telescope (CFHT) had mapped the Andromeda Galaxy's stellar halo (one quarter) up to ~150 kpc.

[5] The survey confirmed the clumpiness of Andromeda's stellar halo.

[5] They include: Andromeda XI, XII, XIII, XV, XVI, XVIII, XIX, and XX.