Dinakara (fl. 1550) was an astronomer from India who produced a treatise named the CandrÃÂrkë (consisting of 33 verses) dealing with the preparation of Indian calendars (pancanga) based on the movement of the sun and moon. The treatise exists in as many as 150 manuscript versions as well as with commentaries, some of which have been interpreted, translated and compared with modern approaches.
Dinakara is noted as the son of RÃÂmeà Âvara and greatgrandson of Dunda from the Moá¸ÂhajñÃÂti family and at the time of writing his treatise was residing at BÃÂrejya (which has been assumed to be Bariya in Rewa Kantha, Gujarat). His major works were astronomical tables made for à Âaka 1500 (Sunday, April 9, 1578 CE) and à Âaka 1505 (AD 1583). His treatise Kheá¹Âakasiddhi (1578) contains rules for determining the positions of the five planets based on the Brahmatulya of BhÃÂskara II. The CandrÃÂrkë has tables on solar and lunar movement. His third work TithisÃÂraá¹Âë (or DinakarasÃÂraá¹Âë) (1583) covers the making of pancangas, the calculation of days, tithis, naká¹£atras, and yogas, and was based partly on the earlier work MahÃÂdevë of MahÃÂdeva. Dinakara's work was an influence for Haridatta II's Jagadbhà «á¹£aá¹Âa (1638).
Achalajit of Muraripupura in Gurjaradesa wrote another Chandrarki (IAST: CandrÃÂrkë) in 1655, by converting Dinakara's work from the system followed by the brahma-paksha school to that of the saura-paksha school.