Starbase 4
Starbase 4 was a Federation starbase that was administered by Starfleet. The planets Ariannus, Marcos XII, and Triacus, and the primary Epsilon Indi were located near this starbase. 

In 2259, the location of this starbase was labeled on a stellar cartography chart seen on the 's ready room viewscreen. ()

The survivors of the Starnes Exploration Party on Triacus were transported to Starbase 4 by the  in 2268. ()

Later in the same year, one of its shuttlecraft, da Vinci, was stolen from the starbase by Lokai, a fugitive from the planet Cheron, two weeks before it was found by the Enterprise. ()

In 2399, the location of Starbase 4 was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. The starbase was located in or near to Federation space. ()

Appendices

Background information 
Starbase 4 was referred to in the final draft script of , at one point said to be ninety-six days, seven hours from the  at a velocity of point three seven of light speed.

Apocrypha 
Starbase 4 appeared in the Pocket Books  Memory Prime, written by Garfield Reeves-Stevens and Judith Reeves-Stevens. The base was under the command of Commodore Montana Wolfe, and had its insignia in the rough shape of the  constellation.

External link 
 

bg:Звездна база 4
de:Sternenbasis 4
es:Base Estelar 4
fr:Base stellaire 4
ja:第4宇宙基地
nl:Sterrenbasis 4
0004, Starbase