Regulus

Also known as Alpha Leonis
Quaternary system
- Regulus A chief primary, orbited by white dwarf
  - Upon death of Regulus A primary, Regulus A swelled to blue giant (TOS Novel: The Captain's Oath)
    - Innermost planets vaporized (TOS Novel: The Captain's Oath)
    - More distant rocky worlds became habitable (TOS Novel: The Captain's Oath)
      - Sudden ecological shift resulted in accelerated evolution (TOS Novel: The Captain's Oath)
- Regulus BC binary pair orbiting at extreme distance
In the Beta Quadrant near the Federation/Klingon/Romulan triborder, within Regulus Sector (TOS Novel: Ex Machina)
- About 16 parsecs from Rasalas; three days at warp 6 (OS) (TOS Novel: The Captain's Oath)
Starbase 22 in stellar orbit (TOS Novel: Ex Machina; Ex Machina annotations)
Unrelated to the Regulus approximately 300 light years from core territories except by name
System's worlds became habitable upon

Political Structure

Capital city: Unknown city, Regulus III (TOS Novel: The Captain's Oath)
Nation
- - c.21th century - c.22nd century - : Independent (TOS Novel: The Captain's Oath)
  - Confederacy of Vulcan protectorate (TOS Novel: The Captain's Oath)
- - 2254 - Present: United Federation of Planets (TOS: "The Cage", "Amok Time"; TOS Novel: The Captain's Oath; DS9: "Fascination")
Military: Regulan Defense Force (TOS Novel: The Captain's Oath)
- Founded prior to [[Starfleet] (TOS Novel: The Captain's Oath)
Legislature: Central Council (TOS Novel: The Captain's Oath)
- Representatives from each world (TOS Novel: The Captain's Oath)
  - Regulus I and II share a representative (TOS Novel: The Captain's Oath)