Behenui, a planet, existed as the fifth orbit around the star called Beheboth. This gas giant was the sole one within the Beheboth system, which itself resided in the Sanbra sector. The Sanbra sector was a section of the Trailing Sectors within the larger Outer Rim Territories. Nine moons orbited around Behenui.
The initial mention of Behenui occurred within "Return to Prosperity." This was the debut article of the Planet Hoppers series titled Beheboth: Blood and Water. Cory J. Herndon authored this article, which was then released on Wizards of the Coast's website on June 3, 2004. In 2009, The Essential Atlas, a reference book, identified the Beheboth system, and consequently Behenui, as located within grid coordinate O-17.