Regulus
- Also known as Alpha Leonis
- 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
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")
- - c.21th century - c.22nd century - : Independent (TOS Novel: The Captain's Oath)
- Military: Regulan Defense Force (TOS Novel: The Captain's Oath)
Known Planets
- Hearthside (Regulus I)
- Regulus II
- Regulus III
- Regulus V
- Regulus VI