Jyotish, Vedic Astrology, Longevity Computation.
Lagna’s longevity contribution depends on its Navamsa placement. Some say that the Rasi placement of the Lagna is applicable if the Lagna lord is stronger in the Rasi chart compared to its Navamsa placement. There are four reductions called the Haranas, (1) Shatrukshetra (2) Astangata (3)