Abell 2390 is a massive galaxy cluster located in the constellation Pegasus.

[4] It is classified as an X-ray and rich galaxy clusters measured cooling rate of 200-300 Mʘyr−1.

[6][7] A study has been conducted on the galaxy members of Abell 2390 and finds each of them have different morphology classifications.

[9] Based on weak gravitational distortion of galaxies lying in the background, dark matter distribution is detected in Abell 2390.

Based on evidence, it might be caused by the precession of its central supermassive black hole.