1533 Saimaa, a stony Eos asteroid from the outer regions of the asteroid belt, was discovered by Y. Visl on 19 January 1939.
Yrjo Vaisala [yrj isl (listen) (6 September 1891 in Utra, Kontiolahti, Grand Duchy of Finland  21 July 1971 in Rymattyla, Finland) was a Finnish astronomer and physicist. 1533 Saimaa 19 January 1939 
