Cardassia I

Cardassia I was the first planet in the Cardassian system. This planet was inside Cardassian space in the Alpha Quadrant. In the 32nd century, this planet was located in the Cardassian Zone. The planet was affiliated with the Cardassian Union.

In 2375, the location of Cardassia was labeled on a tactical map that was displayed in the wardroom of Deep Space 9. (DS9: "When It Rains...", okudagram)

Later that year, the position and orbital path of Cardassia I was illustrated on a tactical map that was displayed in the wardroom of Deep Space 9. (DS9: "The Dogs of War", okudagram)

"car-DASS-ee-uh" was the pronunciation for this planet's name from the script pronunciation guide for "Tribunal". [1]
According to the Star Trek: Star Charts, Cardassia I was a B class planet.
According to a stellar cartography map, seen in the Star Trek: Deep Space Nine Technical Manual (p. 3), the Cardassian system was located in the Bajor sector. [2]