SS Acheron

The SS Acheron was an early warp-capable human starship operated by Earth. The ship was part of a three ship expedition to Alpha Centauri that also included the SS Tempest and SS Lydia and lasted from 2066-2068. On the return journey to Earth, the Acheron's warp drive failed, stranding it in interstellar space. The Tempest stayed with the ship while the Lydia continued on to Earth, returning with fresh supplies and a repair team. After its repair, the Acheron returned to Earth with the Tempest and Lydia.

Afterwards, the ship was used as a testbed for new warp technology before being retired in 2378. It currently sits in the Starfleet Museum in orbit around Earth.