Sector Solar

Sector Solar is the Segmentum Solar administrative cube around Sol, Terra's own sector rather than Segmentum Solar the half-galaxy Battlefleet Solar exists to guard.

Subsector-solar holds the Sol System; Chrysis, Phacton, The Comet, and Artefact 9-Kappa-Mu share this chart as sibling pins. This row is the paperwork around humanity's birth-well, not a second name for the Segmentum.

Sector Solar still matters because Terra's address is a nested cube. Unofficial maps keep the segmentum-solar parent and do not reparent Sol here.