Regiomontanus House System

A system of house division based on dividing the quarters of the Equator defined by the Ascendant/Descendant and Midheaven/Immum Coeli axes into equal spatial arcs and projecting them back onto the Ecliptic. Named after Regiomontanus (Johannes Muller), who devised the system 100 years after that of Campanus. The MC and ASC are, respectively, the cusps of the 10th and 1st houses. The arcs along the Celestial Equator, between the MC and ASC, and between ASC and IC are trisected, and House Circles passed through the trisection points; where these House Circles intersect the Ecliptic marks the cusps of the intermediate houses.