cape petersen () is a rounded ice-covered cape on the north side of thurston island, about 18 nautical miles (33 km) east-northeast of cape flying fish. delineated from air photos taken by u.s. navy operation highjump in december 1946. named by advisory committee on antarctic names (us-acan) for carl o. petersen, radio engineer with the byrd antarctic expedition in 1928-30 and 1933-35.