Nature for a deed done with malice aforethought ) of the native and the ineluctable effects he/she has to undergo during the planet’s reign.
There are many Dasa systems, the prominent among them being Vimshottari Dasa System. Vimshottari means 120 and this is a 120 year cycle. Every planet is given a period in sequential order of stars in the Sidereal Zodiac. For instance, South Node ( Ketu ) is assigned a period of 7 years & the South Node rules the first constellation Beta Arietis (Aswini ). The ruler of the next constellation of 41 Arietis ( Bharani ), Venus, gets 20 years. Sun gets 6 years, Moon 10, Mars 7, North Node ( Rahu ) 18, Jupiter 16, Saturn 19 & Mercury 17. This 120 year system is the most widely used. There are other systems like the Kala Chakra Dasa System, based on the Signs of the Sidereal Zodiac, which are also used.
There is a rule that if the Moon’s Navamsa dispositor is strong, the Kala Chakra Dasa should be used. ( Kala Chakra Dasagneyam Chandramsheshe Balanvithe ). If not, the 120 year cycle or Vimshotthari can be be used.
There are many astrologers who base their predictions on other systems of predictions. There are actually 3 major systems of prediction in V A.
1) The Vimshottari or Udu Dasa System of 120 years.
2) The Transit of Gochara System based on Planetary Transits.
3) The Ashtakavarga System.
The Transit influences are always subordinate to the Directional influences. This is exemplified by the statement ” Dasa Prabhedena Vichinthayeth Dridam ” ( Dasa deals with ineluctable effects ). Transit influences are caused by