Da?abala
Da?abala
astronomy.
Da?abala, the son of Vairocana and member of a family from Vallabh? in Saur???ra, was a Buddhist with ?aivite leanings. He wrote two works on astronomy, both of which belong to the Br?hmapak?a (see Essay IV), as modified by the R?jam?g?n?ka (written 1042) of his contemporary, the Param?ra monarch Bhojar?ja (fl. ca. 999–1056).
The Cint?man?is?ra?ik? was written in ?aka 977 (a. d. 1055), while Bhoja was still in power. It contains six sections:
- On tithis (sixty-two verses)
- On nak?atras (nineteen verses)
- On yogas (twenty-one verses)
- On diverse subjects (thirty-six verses)
- On san?kr?ntis (four verses)
- On the sixty-year cycle of Jupiter (sixteen verses).
There is a commentary on it written by Mah?deva, the son of L??iga, also a Gujar?t?, in ?aka 1180 a. d. 1258).
Da?abala’s second work, the Kara?akamalam?rta??a, was written in ?aka 980 (a. d. 1058). It contains ten chapters with 270 verses:
- On mean motions
- On true longitudes
- On the three questions relating to the diurnal motion
- On lunar eclipses
- On solar eclipses
- On heliacal risings and settings
- On the lunar crescent
- On the mah?p?tas
- On conjunctions of the planets
- On intercalary months and the sixty-year cycle of Jupiter.
BIBLIOGRAPHY
The Cint?ma?is?ra?ik? has been edited by D. D. Kosambi in Journal of Oriental Research, 19 (1952), supp. The Kara?akamalamärta??a is known only from the description in ?. B. D?k?ita. Bh?rat?ya Jyoti???stra (Poona, 1896: repr., 1931), pp. 239–240.
David Pingree
