Alpha Leonis system

The Alpha Leonis system, also known as the Regulus system, was an inhabited planetary system in the Beta Quadrant. It was a quaternary star system consisting of the stars Regulus/Regulus A, an unnamed white dwarf, Regulus B, and Regulus C. Together, these stars formed a pair of binary star systems. 
The Alpha Leonis system had at least six planets. Notable forms of life in this system included the eel-birds of Regulus V and the Regulan bloodworms of Regulus II. (; ; production art; ; ) 
== History ==
In 2154, a Vulcan High Command attack fleet massed in this system in preparation for an abortive preemptive strike against the Andorians. Regulus was the closest accessible star known to be outside the maximum range of Andorian Imperial Guard listening posts. ()
A century later, in 2254, Christopher Pike considered retiring and going into business on or on the Orion colony. ()
In 2257, during the first , this system was occupied by the Klingons. () 
In 2366, this system was in need of medical supplies, which were transported there by the . ()
Prior to 2371, a science academy was founded on Regulus III. In the opinion of Commander Benjamin Sisko, the CO of Deep Space 9, this was a good school. ()
== Stellar Cartography ==
The Alpha Leonis system was located in the constellation . This system was approximately 79.3 light years from Sol and 300 light years from the Bajoran system. ()
In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a color, indicating that it was affiliated with the . () 
In 2293, the location of Regulus in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the . ( okudagram)
The system's location was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters in 2399 and on the bridge of the in 2401. The Regulus system was in or near to Federation space. ()
In 2401, this system's position was labeled on a star chart used by Captain William T. Riker during his attempt at finding the last known location of the . ()
== Appendices==
=== Additional references ===
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=== Background information ===
The connection between the Alpha Leonis system and the star Regulus was established in the episode .
Information on this system was derived from the episodes and films, the reference works Star Trek: Star Charts and Stellar Cartography: The Starfleet Reference Library, and real-world sources. The reference works were used extensively in the creation of star charts seen in , , , , and . 
According to Star Trek: Star Charts ("United Federation of Planets I", pp. 56, 61, and 62) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), in the late 24th century, the system was a destination on the major space lanes. The planets Regulus III and Regulus V were listed as Federation members.
=== Apocrypha ===
According to the novelization of the episode in Star Trek 1, the planet M-113 was the eighth planet in the system, Regulus VIII.
=== External links ===
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de:Regulanisches System
ja:しし座アルファ星系
nl:Alpha Leonis systeem
Category:Star systems