Balance of dasha at birthAfter having decided the planet whose dash a operates at the time of birth, it isimportant to find out how long that dasha would last. This depends upon the exactlocation of the Moon in a nakshatra.Each nakshatra has a span of 13°20'. For the Sun's nakshatra, this 13 "20' wouldmean 6 years; for the Moon's nakshatra, it will mean 10 years; and so on. If the Moon isin the beginning of its nakshatra, a larger portion of the years allotted to it are yet to pass.If it is at the end of the nakshatra, only a small fraction of the total allotted period willremain. The balance of a planet's dasha, thus, is proportionate to the extent of theMoon's nakshatra which is yet to elapse.

Suboeriods in Vimshottari Dasha,It will be noted that the planetary periods, as noted above, last for several years foreach planet. It is difficult to use such broad time spans for timing day to day events. So asto narrow down the time when an event is likely to take place, the major planetaryperiods (also called as Mahadashas) mentioned above are further reduced into subdivisionscalled sub-periods or Antardashas.Under each Mahadasha (MD), the Antardasha (AD) of all the planets operate. Thefirst AD in an MD belongs to the same planet and the remaining ones follow in order.The duration of the Antardashas of the various planets is in proportion to the duration oftheir major periods. The duration of an AD in a given MD can be easily calculated by theformula:'a' divided by 120 x 'b'Where 'a' is the dasha period of the MD lord and 'b' is the dasha period of the AD lordaccording to Table XIV-I, vide supra.For example, let us calculate the AD of Saturn in the MD of the Moon. According to theformula given above, we haveI 0 (Dasha period of Moon) I 120 x 19 (Dasha period of Saturn) = 19/12 years, or I yearand 7 monthsIn this way, any AD can be calculated.

Sub-sub-periods or Pratvantardasha (PO)Still finer divisions of time can be obtained by dividing a given Antardasha intosub-sub-periods (PD's) in the same proportions as the duration of their dasha periodsmentioned above. The first PD in a given AD belongs to the AD lord itself while theremaining PD's follow in the usual order of the Vimshottari dasha.A PD is calculated in an AD by the formula:a /120 X b/120 XC

where:'a' is the dasha duration ofthe MD lord;'b' is the dasha duration of the AD lord; and'c' is the dasha duration of the PD lord.The results obtained in years is converted into months by multiplying by 12; andinto days by further multiplying by 30.Tables XIV-4 to Tables XI V-12 give the AD's and PD's (sub-periods and sub-subperiods)in the MD's (major periods) of different planets.