Inferna Prime
Inferna Prime was the inhabited prime planet in its star system.  The system was located in the Alpha Quadrant. The planet was located eight days away from Deep Space 9 at the cruising warp speed of a  runabout.

In 2259, the planet's location was labeled on a stellar cartography chart that was seen on a 's ready room viewscreen. This planet's symbol had a blue color, indicating that it was affiliated with the . ()

In 2373, the Federation Grand Jury was convened on this world to hear a case concerning the Orion Syndicate. Quark was a witness in the case and was called to Inferna Prime to testify, but the Syndicate attempted to have him killed en route. ()

In 2399, the location of Inferna Prime was labeled in a Federation star chart  that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This planet was in or near to Federation space. () 

In 2401, the location of Inferna Prime was labeled on a star chart that was seen on the 's bridge viewscreen. The chart was used to show the location of the combined Starfleet-Borg armada and where it needed to go to face a galactic-level threat. ()

In 3189, the location of Inferna Prime was denoted on a holographic star chart of the galaxy at Federation Headquarters. ()

In 3190, the location of Inferna Prime was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. ()

Appendices

Background information 

"in-FER-nuh" was the pronunciation for this planet's name from the script pronunciation guide. 

The  identified Inferna Prime as a Federation world. StarTrek.com identified the world as a UFP member or as an associate member. 

According to Star Trek: Star Charts ("United Federation of Planets I") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Inferna () system was a quadrinary star system consisting of a pair of G-class stars, an F-class star, and a K-class star. In 2378, Inferna Prime was listed as a Federation member.

External link 
 

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ja:インフェルナ・プライム
Planets