Mikah was a planet in the Delta Quadrant.

The USS Voyager visited Mikah in 2374, while the Ramuran tracer Kellin was aboard tracking the fugitive Reskat. Kellin pretended to believe that Reskat had escaped to Mikah and that she was preparing to leave Voyager to follow, in order to catch him off-guard. (VOY: "Unforgettable")

This planet was only mentioned in dialogue.
According to Star Trek: Star Charts (p. 89), Mikah was located in a binary star system. The primary was a F-class star and its companion was an A-class star. Voyager visited this system on stardate 51813.