Sector
A Sector is a astrophysical co-ordinate system applied to the galaxy. A sector is part of a Domain within the Imperium, and contains sub-sectors.
Mapping unit in astrography equal to sixteen subsectors. Average density 500 to 650 worlds per sector. Sectors are named, and several synonyms are in common use, including march (or marches), region, reach (or reaches), quadrant, and matrix. The Spinward Marches, for example, is a sector.
As a rough means of comparing size, the sector counts of the large interstellar states and areas of settlement are:
- The Imperium: 19.
- The Aslan Hierate: 15.
- The Hive Federation:11.
- The Two Thousand Worlds: 9.
- the Vargr Extents: 9.
- The Zhodani Consulate: 8.
- The Solomani Confederation: 5.
Several sectors are known by other names (by non-imperial races). Strangely enough they use the same co-ordinate system. The earliest known use of the term sector was among the Vilani, who used a slightly smaller 'parsec', compared to the current, Solomani-derived parsec.
The library refers to all sectors with the word Sector, thus Riftspan Reaches, or Dark Nebula are known as Riftspan Reaches Sector or Dark Nebula Sector in Library Entries even though the former name is used in normal discussion.
q.v. Sector Map
Sectors
See also Sectors for an alphabetical listing of all sectors, and alien names for those sectors.
The following table lists the Sectors near the Imperium; see articles on the other empires for sectors in their Domains, and Subsector Map for a map of allegiances by subsector.
Red Sectors are Mostly Imperial Controlled, yellow Aslan, green Vargr , purple Hiver, oravne Solomani and blue Zhodani: