We know that when a whole is divided into equal parts, the parts contain the same quality of the whole. Hence, in Dasa calculation such as Vimshottari, each period is proportionally divided into 9 parts, each having similar quality of the whole. The same concept is repeated when a day is divided into hours. This concept is immensely useful to understand the qualities of the sub-part. For instance, if an activity requires to be done on a Sunday, it can also be done on the Sun’s hora on any other day. In fact, the computation of Hora-Dina-Masa-Abda bala in the shadbala-kalabala illustrates the fact that, the sub-part is even more powerful than the main part.

The same concept is applied when a Rasi is divided into 12 parts, as the zodiac contains 12 Rasis. An even minute division is sub-division of the 12th part into another 12 parts. When a Rasi is divided into 12 parts, it is called Dvadasamsa. When a Dvadasamsa is further divided into 12 parts, it is called D144 or Dvadasamsa-Dvadasamsa. Each of these sub-parts contain same qualities of the Dvadasamsa, but to a much higher intensity.

When one is born with say Vrsha Rising, will everyone so born have the same intensity of qualities of Vrsha Rasi? The answer is NO. The entire 30 degree sign of Vrsha does not have equal spread of its quality throughout its sign. The quality changes every 2.5 degrees due to change of the Dvadasamsa. Thus one born in 2nd Dvadasamsa will have a stronger tinge of Mithuna than Vrsha. The overall nature of the person will be a blend of Vrsha and Mithuna, where Mithuna will be more prominent and Vrsha only somewhat prominent. Hence, it is highly important to know the Dvadasamsa of not only the Lagna but all the Grahas, as their qualities due to placement in certain zodiac sign undergo transformation due to placement in different Dvadasamsas in that Rasi.

So, to understand the subtle qualities of Grahas and their impact on the native’s life, one needs to understand the Dvadasamsa placement. This can be a handy tool for rectifying a horoscope.