Cuellar system
The Cuellar system was an inhabited Cardassian star system located in Sector 21505, in the Alpha Quadrant. It had a good strategic position, as it was "within arm's reach" of three Federation sectors alongside the Federation-Cardassian border.

A Cardassian space station was located in the system until it was incinerated by the  in 2367. The Cardassians claimed it to be a science station, but Captain Benjamin Maxwell of the Phoenix claimed that there was nothing of scientific interest in the system and considered it a military supply port. ()

Appendices

Background information 

This star system's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the  episode .

According to the script, the pronunciation for Cuellar was "KWAY-yar". 

According to Star Trek: Star Charts (p. 47) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the primary of the Cuellar system was a primary was a F-class star.

External link  
 

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Star systems