1928 PE. Discovered 1928 Aug. 15 by P. F. Shajn at Simeis. Independently discovered 1928 Aug. 16 by G. N. Neujmin at Simeis.
Named for the country of Poland. Polonia is the Latin name. (H 104)
Named in accordance with the discoverer by L. Mat-kiewicz (RI 304), who computed the orbit of this planet.
This is the first minor planet that was discovered by a woman.