Alpha Leonis system
From Memory Alpha, the free Star Trek reference.
The Alpha Leonis system (or Regulan system) was the star system around the star Regulus. It was located 77.5 light years from Sol, and 300 light years from the Bajor system. (DS9: "Fascination")
This system contained planets capable of supporting life; there was a humanoid population on Regulus III. Animal life existed in this system, such as the eel-bird of Regulus V. The Regulan bloodworm also originated here. (TOS: "Amok Time", "The Trouble with Tribbles")
In 2154, a Vulcan High Command attack fleet massed in this system in preparation for an abortive preemptive strike against the Andorians. The Regulan system was the closest accessible system that was known to be outside the maximum range of Andorian Imperial Guard listening posts. (ENT: "Kir'Shara")
Christopher Pike once considered retiring and going into business on Regulus or on the Orion colony. (TOS: "The Menagerie, Part I", "The Menagerie, Part II")
In 2366, this system was in need of medical supplies, which were transported there by the USS Enterprise-D. (TNG: "The Vengeance Factor")
- Regulus (primary)
- Regulus I
- Regulus II
- Regulus III
- Regulus IV
- Regulus V
- According to astronomical estimates, Regulus is only a few tens of millions of years old. Therefore it is highly unlikely that any of the lifeforms within the Regulan system are indigenous. Rather it seems more likely that they were transplanted by later (probably Human or Vulcan) colonists.
