Rigel Upperstage Family

Rigel I

-Used as an alternative upperstage for Titan I and II launches.

-Served as rendezvous target for Aquila program

-Powered by LV-T30 "Reliant"

Rigel II

-Powered by RE-J10 Wolfhound

-Used on Pegasus Rockets

Rigel III

-Powered by RE-J10 wolfhound

-Extended Tank version of Rigel II

-Used on Trojan III thru Trojan V.