Calculations of Gulik etc. The portions of Sūrya etc. up to Śani denote the periods of Gulik and others. Divide the day duration (of any week day) into eight equal parts. The eighth portion is Lord-less. The seven portions are distributed to the seven Grahas commencing from the Lord of the week day.
Whichever portion is ruled by Śani, will be the portion of Gulik. Similarly make the night duration into eight equal parts and distribute these, commencing from the Lord of the 5th (by) week.
Mangal‟s portion is Mrityu, Guru‟s portion is Yamaghantak and Budh‟s portion is Ardhaprahar. These durations differently apply to different places (commensurate with variable day and night durations).
Gulik‟s Position. The degree, ascending at the time of start of Gulik‟s portion (as above), will be the longitude of Gulik at a given place. Based on this longitude only, Gulik‟s effects for a particular nativity be estimated.