Mendorax Dellora

Mendorax Dellora was a human colony planet which; by the year 5343, was ruled by King Hydroflax up to his demise. (TV: The Husbands of River Song)

Astronomical data
The surface of the planet appeared to be Earth-like, blanketed with ice and snow, littered with large stretches of forest and an oxygen-rich atmosphere, apparently capable of sustaining human life.

The planet had two large blue moons visible within its atmosphere. (TV: The Husbands of River Song)