The Agena name was suggested by the Department of Defense's Advanced Research Projects Agency for the star Beta Centauri, also known as Agena, because this upper stage would "ignite in the sky".
Nama Agena disarankan oleh Departemen Advanced Research Projects Agency Pertahanan untuk bintang Beta Centauri, juga dikenal sebagai Agena, karena tahap atas ini akan "memicu di langit".