Background information Edit
"AWK-uh-mar" was the pronunciation for this star's name from the script pronunciation guide.
According to the Star Trek: Star Charts (p. 56) and the Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Acamar (Theta Eridani) was a binary system of two A-class stars. This system was located in the Beta Quadrant.
This star was mentioned as a destination in Pocket TOS: The Wounded Sky, and (with the "Theta Eridani" name) in Marvel TOS: Experiment in Vengeance! where the second planet in this system had a moon named Mycena. Neither of these depicted the existence of the native Acamarian civilization on the third planet.