Bela Tegeuse was the fifth planet in the Alpha Leporis (Kuentsing) binary star system.
Prior to the Butlerian Jihad, the planet was controlled by the thinking machines and its capital was Comati; during the war, it was the first target of the Jihad to be freed, however soon it was reclaimed by the machines. Bela Tegeuse-Omnius was the first to receive the Omnius 'update' from Earth which was corrupted by Vorian Atreides and the political structure of the planet soon deterioriated.
During the protracted campaign, it was captured by the renegade Titans, and for a while became their base of operations. It was devastated toward the end of the Jihad.
Bela Tegeuse had an oxygen-nitrogen atmosphere, and low photosynthesis levels. It's photosynthesis level was partly due to the dimness of both its stars (a red secondary and a white dwarf primary), and partly because of its constant thick cloud cover. Thus it was capable of, but poorly equipped to, handle human life. The planet's was described as being murky and dim.