The Haktuth Nebula was a stellar phenomena, a nebular gas cloud somewhere in the galaxy's Alpha or Beta Quadrants. This spiral nebula was located near Klingon space.
History and specifics
In the year 2281, Lord Krazz's ship was near this nebula when he received orders to take custody of Federation Warrantors of Peace from the Romulans. (TOS novel: Dwellers in the Crucible)