The USS El Dorado (NCC-1722) was a Constitution-class, Bonhomme Richard-subclass starship in Starfleet service in the second half of the 23rd century. (Star Fleet Technical Manual; The Starfleet Museum)
Fleet Captain Gerry Anderson was El Dorado's commanding officer sometime prior to 2292. (Dockyard Review)
A Prime Team called the "Golden Jaguars" was assigned to El Dorado. (Task Force Games: UFP: The Federation Sourcebook for Prime Directive)
USS El Dorado (NCC-1722) article at Memory Beta, the non-canon Star Trek wiki.