Klethor was a star system in the Alpha or the Beta Quadrant. It neighbored the Daros system.

There were at least nine planets in its associated star system, including Klethor II and Klethor IX, both of which had Eldor fruit orchards affected by Eldor Fruit Rust. One of these worlds was home to the Klethorian race. (FASA RPG module: Orion Ruse)

Due to a number of errors surrounding planet names in the source, it is possible that Klethor II and Klethor IX were meant to be the same world. Planet IX was misspelled as ‘Kelthor’, but the former spelling is more common.
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