It was discovered 11. March 1942, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named it "Suomi", the native name of Finland.
It also have a satellite.

https://en.wikipedia.org/wiki/1656_Suomi#:~:text=1656%20Suomi%20(prov.,the%20native%20name%20of%20Finland.

About Turku Observatory :
https://en.wikipedia.org/wiki/Vartiovuori_Observatory

Time: 23:14UT 2025-06-21 Exp. 24 x 40 sec.
Tel: C14 @ f/4.6 ST-7 CCD -15°C 1.14"/pix Paramount GT-1100S Tenagra Norway
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.