Background information Edit
This planet was only mentioned in writing.
According to Star Trek: Star Charts ("United Federation of Planets I"), Aaamazzara corresponded with the real star Epsilon Serpentis and was synonymous with Therbia. The fact that Aaamazzara and Therbia were both mentioned in the same list would suggest they were different planets, however. According to the same book, Aaamazzara was not only the name of a planet, which had become a Federation member by 2378, but also a A-class star in the Alpha Quadrant.
According to Stellar Cartography: The Starfleet Reference Library (p. 45; "Federation Historical Highlights, 2161-2385"), the Aaamazzara system was located in the Alpha Quadrant. This was a single star system. In 2385, this system was a UFP member.