UNSS Arcturus

UNSS Arcturus were three Terran starships of the 21st and 22nd centuries. (Star Trek: Arcturus: "The USS Arcturus in History"; )

2018-25: The first UNSS Arcturus was a vessel that made the first Earth-Titan voyage under the command of Colonel Shaun Geoffrey Christopher (Col. Christopher and his expedition is mentioned in )

In 2035, Arcturus was destroyed in Earth orbit during Col. Green's War.

The explorer UNSS Arcturus, the second starship named, was one of the mainstay ships of the Earth-Alpha Centauri patrol sector, first established in the 2090s.

2110: Arcturus retasked as a commercial carrier (thus, it changes from “UNSS” to “SS”) for use by scientific expeditions. Its modular design makes it ideal for such tasks.

In 2127, Arcturus conveyed a scientific team from the American Continent Institute and surveyed Wolf-catalogue red dwarf stars within a 5-parsec sphere of the Sol system. The team, led by Esteban Velasco, identifies heretofore undiscovered reserves of topaline and pergium on the fifth planet of Wolf 359. 

A modified cruiser UNSS Arcturus -- carrying more powerful lasers and a prototype accelerator cannon -- distinguished itself at the battles of Alpha Trianguli and Nu Chalcedonis against Romulan forces in 2159. (Star Trek: Arcturus: "The USS Arcturus in History")