Jyotihshastra: Astral and Mathematical Literature c4.s2.62

c4.s2.62

In about 950—1000 a second Āryabhaṭa⁷⁵ wrote a Mahāsiddhānta⁷⁶ in large part based on the Brāhmapakṣa, but beginning the planets’ rotations 3,024,000 years after the beginning of the Kalpa in the fashion of the Saurapakṣa and substituting a new set of planetary parameters. He also reports another set of new parameters which he found in a treatise ascribed to Parāśara (MS 1, 2). And, while following Lalla in dividing his work into a grahagaṇita and a gola section, he follows Brahmagupta’s BSS in including chapters on arithmetic and geometry (2, 2 = 15) and on the kuṭṭaka (2, 5 = 18) in his siddhānta.