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Memory Alpha

Argelius, also known as Iota Leonis or 48 Leonis, was an inhabited planetary system located in the Argelius sector, Beta Quadrant.

This was the home system of the Argelians.

Components[]

Stellar system[]

This was a trinary star system. It was organized into a single star system and a binary star system.

The primary of this system was Iota Leonis Aa. This was a F-type subgiant and one of the stars in the binary system. Its companion was Iota Leonis Ab, a F-type dwarf.

Orbiting this binary system, there was the tertiary companion Iota Leonis B. It was a G-type dwarf in a single star system. (ENT: "Cold Front")

Planetary system[]

In this system, there were at least four planets. Located in the system's habitable zone, Argelius II was the homeworld of the Argelians. Another planet in this system was Argelius IV. (TOS: "Wolf in the Fold"; ENT: "Cold Front"; SNW: "Strange New Worlds")

Stellar cartography[]

The Argelius system was visible from Earth in the constellation Leo. This system was approximately 77 light years from Sol.

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the United Federation of Planets. (SNW: "Strange New Worlds", "Spock Amok", "A Quality of Mercy")

On stardate 1292.4, the location of this system was labeled in a chart used during a Section 31 Alpha Team briefing. (Star Trek: Section 31)

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 USS Titan-A in 2401. The Argelius system was in or near to neutral space. (PIC: "Maps and Legends", "The Next Generation", "Disengage")

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 SS Eleos XII. (PIC: "The Next Generation")

DMA star chart 2

Location of Argelius labeled on a star chart (3190)

In 3190, the location of Argelius was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. (DIS: "The Examples")

This star system was only mentioned in writing.
Information on this system was derived from the episodes, 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 Star Trek: Discovery, Star Trek: Picard, Star Trek: Strange New Worlds, Star Trek: Prodigy, and Star Trek: Lower Decks. The real-world information added to the article was current as of 2025.

External links[]