You may be looking for the Federation Councillor Corvix.

Corvix was a moon that orbited the Klingon homeworld of Qo'noS.

After the destruction of its sister moon Praxis, it would be the only natural satellite that orbited the capital of the Klingon Empire. It was home to a number of mining operations and an early warning defense station. (Decipher RPG module: Worlds)