How Vimoshottari Dasa Period Is Derived For Each Planet. Hindu Classical Astrology Text has various dasa systems available. Vimshottari Dasa system is the popular system used for practical purpose. In sanskrit, vimshottari means 120. The life time is taken as 120 years in this system. This 120 years of life time is divided into 9 parts and allocated to 9 planets based on the birth of a person. Each planet is provided with different time duration.Now let us see how this 120 years is been derived. Multiply the time of a nakshatra by the total number of planets X 9 planets

The divisions of a day is as follows:
• 60 vipalas = 1 pala = 24 seconds;
• 60 palas = 1 ghatika = 24 minutes;
• 60 ghatikas = 24 hours = 1 day.
• Sun= 36 days
• Moon = 60 days
• Mars = 42 days
• Rahu = 108 days
• Jupiter = 96 days
• Saturn = 114 days
• Mercury = 102 days
• Ketu= 42 days
• Venus 120 days
Each Nakshtra measures 60 Ghatikas
•  Sun= 36 days, moon =60 days, Mars = 42 days, Rahu= 108 days,
• Jupiter =96 days, Saturn = 114 days, Mercury = 102 days,
• Ketu=42 days and Venus 120 days Each Nakshtra measures 60 Ghatikas
• SUN =60 Ghatikas x 36 days =2160 days which is equivalent to 6 years
• Moon =60 Ghatikas x 60 days =3600 days which is equivalent to 10 years

Like wise we get Mars - 7 years, Rahu-18 years, Jupiter-16 years, Saturn 19 years, mercury -17 years, ketu 7 years, and Venus 20 years.When we add up all the years totally we get 120 years.This is how Raghu & Kethu gets 18 & 7 years respectively.

Normal life span of an ideal human being is considered to be 120 years. This life span is divided into 9 parts based on the planet rising at the time of Birth ie based on Nakshatra as Milind as Put. Each Planet has its duration. VIMSHOTTARI MEANS 120 Hence the system of prediction based on 120 years is Vimshottari Dasa system. While Astottari dasa system recognise 108 years. The figure 120 is obtained by multiplying the span of a nakshatra by the total number of planets X 9 planetsThe duration of Planets are as under, which are measured in Ghatikas.

There are around 30 dasas in vedic astrology among them Vimshottari is popularly used in most places in india. While in Northeastern side Astottari system is used

Basic of Dasa Period and why they are different It is very interesting question. In Vimshottari dasa, the total Life span is 120 years, which comprises of 9 planets dasa. This 120 years is divided in 12 years each . There are 9 planets + lagna which is 10 in number . 12X10=120 years actually. Hence it should have been 12 years period each. But the fact is not so. Each planet have there own set of periods in the dasa, like Sun having only 6 years and Saturn having 19 years etc.

The reason for this goes like this SUN actually has 12 year period, but being eclipsed , the period of SUN is reduced by the Period gained by Rahu, hence Rahu takes away 6 years from SUN and thus SUN has only 6 years in the Dasa Period and Rahu has 18 years. Mars and ketu are similar in nature and being the two children of Shiva, Mars being ruler of the week and 7 days of God is equal to 7 years of Human being and hence they carry only 7 years each in the Dasa Period. This loss of 10 years of the both the planets is taken by their mother Moon and hence the Dasa period of moon is 10 years. Everything being that has taken birth has to grow up and growth is ruled by Upachaya 3,6,10 &11 From Aries the natural lagna these signs are gemini, virgo, capricorn, aquarius ruled by mercury and Saturn. The period contributed by Lagna is shared by Mercury and Saturn thus. Metonic cycle of Saturn is 19 years and hence the dasa period of Saturn is 19 years, having taken 7 years from lagna, the left 5 years is added to Mercury and thus mercury has dasa period of 12 years of its own and 5 from lagna's contribution and thus it has 17 years of dasa period. Jupiter is the Guru of the Vimshottari dasa, and hence it should have total of Sun and moon dasa and so it is 16 years. The balance left over is available to Venus and thus venus dasa is 20 years

Normal life span of an ideal Human being is considered to be 120 years. This life span is divided into 9 parts based on the planet rising at the time of Birth ie based on Nakshatra as Milind as Put. EAch Planet has its duration. VIMSHOTTARI MEANS 120 Hence the system of prediction based on 120 years is Vimshottari Dasa system. While Astottari dasa system recognise 108 years.The figure 120 is obtained by multiplying the span of a nakshatra by the total number of planets X 9 plantesThe duration of Planets are as under, which are measured in Ghatikas Sun= 36 days, moon =60 days, Mars =42 days, Rahu= 108 days, Jupiter =96 days, Saturn = 114 days, Mercury = 102 days, Ketu=42 days and Venus 120 days

There are around 30 dasas in vedic astrology among them Vimshottari is popularly used in most places in india. While in Northeastern side Astottari system is used

• Sun = 60 Ghatikas x 36 days = 2160 days which is equivalent to 6 years
• Moon =60 Ghatikas x 60 days = 3600 days which is equivalent to 10 years
• Mars = 60 Ghatikas x 42 days = 2520
• Raghu = 60 Ghatikas x 108 days = 6480
• Jupiter = 60 Ghatikas x 96 days = 5760
• Saturn = 60 Ghatikas x 114 days = 6480
• Mercury = 60 Ghatikas x 102 days = 6120
• Ketu = 60 Ghatikas x 42 days = 2520
• Venus = 60 Ghatikas x 120 days = 7200