KochThe Koch house system (also called "house system of the birth place") is defined by horizon lines at different times on the day of birth. We calculate the timespan that the MC zodiac degree has spent above the horizon since its rising. The cusp of the twelfth house is where the Ascendant was when 1/3 of this time had passed, the eleventh house cusp is where the Ascendant was when 2/3 of that time had passed. The cusps of houses 9 and 8 can be explained as Descendants for 1/3 and 2/3 respectively of this time span after birth. Therefore, the Koch house system assigns special significance to the MC-IC axis, because the measure of the division is predefined by the diurnal arc of the zodiacal degree of the MC at birth. Like Placidus, the Koch system divides celestial movements and is therefore considered a time oriented system. For mathematical reasons, Koch houses cannot be calculated for regions beyond the polar circles. The house system is named after the German astrologer Walter Koch (1895-1970) but was actually invented by Fiedrich Zanzinger (1913-1967) and Heinz Specht (1925-). More information can be found in the Astro Wiki |