1900 Katyusha is a stony background asteroid from the inner asteroid belt, approximately 9 kilometers in diameter. It was discovered on 16 December 1971, by Russian astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula and named in honor of Yekaterina Zelenko, the only woman to credited with conducting an aerial ramming.