The Delta Vega sector was a region of space. This sector was home for Starbase 237, Delta Vega, and the galactic barrier.
In 2369, this sector was named in the personal log of Lieutenant Keith Rocha, a network relay tech on Relay Station 47. The relevant log entry transcribed on stardate 45458 was: Had to switch the new Starbase 237 lines back to normal feed in the Delta Vega sector. Nothing exciting, but we took the oppurtunity to perform some upgrades in the data compression software. We were running the old version in most of those old units, which shouldn't be a problem since those are low-traffic links, but it's better anyhow. (TNG: "Aquiel", production art)