Imperatrix is asteroid #1200 and also known as 1931 RH. Imperatrix is a member of the asteroid-family Hygiea. Imperatrix was discovered by Karl Wilhelm Reinmuth at the Heidelberg-Königstuhl State Observatory.

Imperatrix is named after the Latin word for an empress. This name was proposed by Gustav Stracke, after whom the asteroid Strackea is named. Who is the empress, who he had in mind, or whether he at all had a certain empress in mind is unknown. So Imperatrix simply represents women in top positions.