Marat Arsen Arakelian (Armenian: Մարատ Արսենի Առաքելյան) (Russian: Марат Арсенович Аракелян) (15 January 1929 – 20 January 1983) was an Armenian astronomer. Arakelian was a specialist in theoretical astrophysics and extragalactic astronomy. He is most noted for his catalog of “Galaxies of high surface brightness” (named Arakelian galaxies, Akn), a list of 621 objects with surface brightness at least 22.0 magnitude from an area of 1 sq. arc second. The has become a source in the study of active galactic nuclei.