Quadros-1 probe
The Quadros-1 probe was a deep space probe that charted stars of the Gamma Quadrant in the 22nd century, including the Idran system. Findings of the probe were stored in the computers of Federation starships, such as the . 

Benjamin Sisko and Jadzia Dax used the data from Quadros-1 to identify Idran after they had entered the Gamma Quadrant through the Bajoran wormhole in 2369. ()

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Probes