For other uses, see Halcyon.

Halcyon is an inhabited planet located in the Alpha Baratis star system, at coordinates 2.48S 7.05W.

In the 23rd century, Halcyon was home to a Human mining colony. By reference stardate 2/2306, the world had a population of 10 million individuals, mostly Human, and the government was a colonial member of the Federation. (FASA RPG module: The Federation)