- You may be looking for Magus III.
Makus III was the third planet in the Makus planetary system. Makus III was located 3 days away from Murasaki 312 at warp 1. (TOS: "The Galileo Seven") This system was located in the Alpha Quadrant. (Star Trek VI: The Undiscovered Country, display graphic)
In 2267, the USS Enterprise carried emergency medical supplies to be transferred to New Paris colonies. The Enterprise rendezvoused with the ship designated to carry the supplies to New Paris at Makus III. (TOS: "The Galileo Seven")
The location of Makus III in the Milky Way Galaxy was depicted on a Federation star chart of the explored Galaxy in 2293. (Star Trek VI: The Undiscovered Country, display graphic) The planet's location was also depicted in the star chart Data and Picard were studying in Stellar Cartography in 2371. (Star Trek Generations, display graphic)