Ayurdaya

ah-yoor-DAH-ya

sanskrit: आयुर्दाय (Āyurdāya)

Definition

Ayurdaya is the determination of the length (daya) of life (ayus) — the Jyotish techniques for working out the span of your life from the birth chart. Several classical works give it dedicated chapters, and most treat it as a branch to settle before the rest of the chart is judged. The methods assign each planet a base figure of years, then adjust it for dignity, combustion (closeness to the Sun), retrogression, and the house and sign it occupies, often adding the share of the Lagna (the rising sign), before the totals become solar years.

In Tradition

Across the Jyotish literature Ayurdaya is approached not as one calculation but as a family of competing systems, and the one you apply is chosen by planetary strength. The Uttara Kalamrita states that longevity "can be calculated in eight possible ways" and that "it is the strongest among the eight that determines the longevity which is applicable to a given chart"; the Jataka Parijata likewise assigns particular systems by which planet carries the greatest Shadbala (the six-fold measure of a planet's strength).

In Practice

A jyotishi first fixes the broad span of life — sources band it differently. Raman gives four classes: Balarishta (death before 8), Alpayu (8 to 32), Madhyayu (33 to 75), and Purnayu (75 to 120); Rath instead uses three compartments of 36 years each, Alpa (0-36), Madhya (36-72), and Purna (72-108). The jyotishi then identifies the marakas (the planets that can kill) and times death under the appropriate Dasa (planetary period). Within Jataka Parijata, Rasmijayurdaya (life reckoned from planetary rays) is used when Mercury carries the greatest Shadbala and Chakrayurdaya when Venus does, while the Ashtakavarga method draws each planet's quota of years from its Bhinnashtakavarga. The resulting Ayus, in its method's own year-measure, is converted to solar years (Sourayus) before predicting. Reliability varies: Raman reports the Ashtakavarga method has not given satisfactory results in actual practice.

Historical Origin

Ayurdaya is attested across the classical Sanskrit corpus: Varahamihira's Brihat Jataka (Ch.IX), which reports Parasara's Hora Sastra treating 32 distinct processes; Vaidyanatha Dikshita's Jataka Parijata (Adhyayas V and X); Kalidasa's Uttara Kalamrita (Ch.III); the Prasna Marga (Part I Ch.IX); and the Laghu Parashari (Ch.3). Modern authors carry it forward, among them Raman, Rath, Narasimha Rao, Raj Kumar, Boney, and Charak.

Definition

In Tradition

In Practice

Historical Origin

Further Reading