M-class planet in the Calder system. Calder II is the location of ancient Sakethan burial mounds, a site associated with ancient Romulan artifacts.
By 2370, Calder II was the location of a small Federation science station and outpost with limited defensive capabilities. The outpost and the ruins are protected by a type-four deflector shield and the station was defended by a minimum of two phaser banks.
Picard (as Galen) claimed to have attempted to smuggle a Sakethan glyph stone out of there in 2369. (TNG:"Gambit, Part I")