Kachissat, also known as Daran V, was a planet located in sector 54R, in the galaxy's Alpha or Beta Quadrants, the fifth planet in orbit of the Daran star system. By the 23rd century, Daran V was within the boundaries of the space of the Federation.
Kachissat is the home of a civilization of avianoids known as the Shesshran. The planet has a dense atmosphere, with an atmospheric pressure 3.4 times Earth-normal, and gravity force 1.65 times that of most standard class M planets.
10,000 years ago, the planet was home to a species of avians known as the Tishiki. When the Fabrina star went supernova, Kachissat was devastated by the explosion, and many of the Tishiki died in the aftermath. Those who survived became known as the Shesshran, and spent the interim time rebuilding their technology. (TOS novel: Ex Machina, ST reference: The Worlds of the Federation)