dispersion of galaxies in clusters was considered. It was concluded that in some cases the kinetic energy might be underestimated” Astrophysics Arakelian, M. A.; Kojoian, G.; Dickinson, D.F.; Elliott, R.; Bicay, M.D. (1981) “Radio (6cm) observations of Arakelian galaxies and publication of their accurate positions” Astronomical Journal Arakelian, M. A.; Mahtessian, A.P. (1982) “Comparative study and statistics of the surface brightness and morphological types of isolated and double galaxies” Astrophysics Arakelian, M. A.; Terebizh, V.Yu. (1982) “Study of Seyfert galaxies in clusters and Seyfert properties of the cluster galaxies” Soviet Astronomical Circular and Soviet Astronomy Letters () Arakelian, M. A. (1983) “Proposing a method for construction of the luminosity function of the components of double galaxies on the basis of an arbitrary sample of pairs of galaxies” Astrophysics Arakelian, M. A. (1986) “A method for the determination of the bivariate luminosity function utilizing an incomplete sample with an application to Seyfert galaxies” Astrophysical Journal Arakelian, M. A.; Tovmasyan, H.M.; Mirzoyan, L.V.; Hambardzumyan, V.H.[editor] (1973). Astronomy (Third ed.). Yerevan, Armenia: Luys. Honors In 1973, Arakelian became a member of the International Astronomical Union (IAU), and joined Commission #28 “Galaxies”. The 621 galaxies in his catalog of galaxies with high surface brightness are designated as “Arakelian galaxies” and carry the designation “ARK” or “Akn” such as galaxies ARK 120 (Akn 120, UGC 03271) and ARK 564 (Akn 564, UGC 12163). References See also Yerevan State University Saint Petersburg State University Moscow State University Arakelian catalog Active galactic nucleus Byurakan Astrophysical Observatory Armenian State Pedagogical University Astrophysics 1929 births 1983 deaths People from Goris Soviet astrophysicists Armenian astrophysicists Yerevan State University alumni Saint Petersburg State University alumni Moscow State University alumni Academic staff of Yerevan State University Academic staff of Armenian State Pedagogical University Soviet Armenians