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83 Leonis was an inhabited planetary system in the Beta Quadrant. (ENT: "Cold Front"; SA: "Ko'Zeine")

Components

Stellar system

This was a binary star system. The primary 83 Leonis A was a G-type dwarf. Its companion 83 Leonis B was a K-type dwarf.

Planetary system

In the system's habitable zone, there was the planet Denobula Prime.

History

When the Venari Ral laid Omega-47 mines around the core of Federation space in 3196, this system was within the enclosed region. (SA: "300th Night")

Stellar cartography

The 83 Leonis system was visible from Earth in the constellation Leo. It was approximately 59 light years from Sol.

In the 2150s, this system's position was labeled on an United Earth star chart which was displayed in several crew and guest quarters aboard the Enterprise. (Star Trek: Enterprise, set decoration)

In 3196, this system's position was labeled on a Federation star chart which was displayed on the main viewscreen of the USS Athena bridge. Systems affiliated with the Federation, including this one, had blue labels. (SA: "Ko'Zeine")

In 3196, during the Omega-47 crisis, the location of 83 Leonis was depicted on star charts and readouts used across several locations on the USS Athena to locate, monitor, and respond to the Omega-47 mines laid by the Venari Ral. (SA: "300th Night")

Appendices

Background information

This star system was only mentioned in writing.

Information on this system was derived from 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, Star Trek: Lower Decks, and Star Trek: Starfleet Academy. The real-world information added to the article was current as of 2026.

The star chart seen in the series Star Trek: Enterprise made its first appearance in Crewman Daniels quarters in "Cold Front". It was also seen in several other episodes of the series, from 2151 to 2154. (For more information, see Federation star charts#United Earth Alpha/Beta star chart}

In the Star Trek: Starfleet Academy episode "Ko'Zeine", the association between 83 Leonis and Cheron was canonized with the chart label "Cheron (83 Leonis)".

In Star Trek: Star Charts' ("United Federation of Planets I"), the 83 Leonis system was associated with Cheron, where a historic battle took place sometime after 2154.

As of 2026, there were two confirmed exoplanets – 83 Leonis Bb and 83 Leonis Bc – orbiting 83 Leonis B in this system.

External links