40 Eridani A Starfleet Construction Yards

The  were a Starfleet shipyard facility located in the 40 Eridani system, orbiting the system primary 40 Eridani A. 

Ships constructed

 * USS Brattain
 * USS Phoenix (NCC-65420)
 * USS Prometheus (NCC-71201)

Background
The 40 Eridani yards have never physically appeared in any Star Trek series, but the dedication plaques for the Brattain, Phoenix, and Prometheus, visible in their respective episodes, list them as their yard of origin.