Starbase 78 was a Federation starbase administered by Starfleet. This starbase was in Sector 1540.
In 2369, Starbase 78 was named on the chart "Sector Ipai Relay Log – Relay Message Flow 1293" in Relay Station 47 Ops. This base sent a message on Starfleet Commnet Three via secure channel. This base was assigned as an overseer for a mining construction zone. (TNG: "Aquiel", production art)
This starbase was only mentioned in writing.