USS Canopus explained

Three ships of the United States Navy have been named Canopus after the first magnitude star Canopus in the constellation Argo.

• was launched in 1919 by the New York Shipbuilding Company as the Santa Leonora.
• (ordered as AS-27, but reclassified before keel-laying) was a destroyer tender, but construction was canceled in 1945 prior to launching.
• was launched on 12 February 1965.