Beta Stromgren

Beta Stromgrem was a red supergiant star in Romulan-claimed space. 

Just before the star's explosion as a supernova, the Vega 9 probe detected the star and Gomtuu (the star was 23 parsecs "beyond the limit of manned Federation exploration". There was another time for a couple of Romulan vessels and the USS Enterprise to investigate.  During this investigation, the star exploded with no indications of where Gomtuu and sole "Tin Man" crewmember Tam Elbrun headed after the encounter.  It was said that Gomtuu still orbited the star's remanants after the explosion.

In 2387 (on stardate 64317.6), a fleet of starships led by Sela passed by the remnant of the star as they head toward uncharted space. [Klingon Empire|Klingon]] long-range sensors detected this.