ACO 347 is a 13th magnitude Galaxy Cluster in the constellation Andromeda. It is about 220 million light years from our solar system. ACO 347 has a physical diameter of about 5 million light years.
Prominent galaxies are NGC 906 (spiral), NGC 909 (elliptical), NGC 910 (elliptical), NGC 911 (elliptical), NGC 912 (elliptical), NGC 914 (spiral), and NGC 923 (spiral). Most of the PGC-galaxies listed also belong to the galaxy cluster.