I thought i would check to see where Meridian Sector RP is listed and it's not listed anywhere. The two main starbound server listing websites do not show "Meridian Sector" anywhere. That goes for google search no results apart from HGN. If your wondering why it's got low activity, it's exactly this, heads, start advertising.
http://starbound-servers.net/
http://starbound.serverlister.com/
Let me google it for you: http://lmgtfy.com/?q=starbound+server+list