Tateos Artemjevich Agekian (Armenian: ?????? ?????? ???????, Russian: ?????? ?????????? ??????, 12 May 1913, Batumi – 16 January 2006, Saint Petersburg) was a Soviet astrophysicist of Armenian descent, and one of the pioneers of Russian and world Stellar dynamics.
Has found two evolutionary sequences of stellar systems: nearly spherical and strongly flattened.
Suggested essentially new method to investigate the structure and kinematics of the Milky Way Galaxy.
Found a new estimate for the dissipation rate in stellar clusters.
Gave an exhaustive analysis of the photogravitational interaction between stars and gas clouds.
A planet (3862, "Agekian") was named in honor of Tateos Artemjevich.