It is based upon the Tara. In Tara calculation 9 groups of Nakshatras are considered. Each group has a benefic or malefic significance.
Tara can be applied to a single planet (e.g. the Moon) or it can be interpreted for a pair of planets. In Dina Koota the relationship between the Moon positions (i.e. the relationship of Janma Nakshatras) of the couple is evaluated.
The table below shows the Tara types and their assignment to the Nakshatras.
|Cycle 1||Cycle 2||Cycle 3|
Nakshatras 3, 5 and 7 are regarded as malefices.
Repeat the same in reverse order, again 1.5 points are assigned if the remainder is not 3, 5, or 7.