The corpus, every claim citable.

Sūrya-Siddhānta i.30 fixes the Moon's sidereal revolutions per Age at 57,753,336; i.37 fixes the Age's civil days at 1,577,917,828. The implied sidereal month, 27.321674 days, differs from the modern 27.321662 by about 1.1 seconds — roughly 0.5 parts per million. Babylonian-Greek lunar theory reached comparable precision by other routes; the Siddhānta's whole-number encoding is the Indian tradition's own and stayed in computational use for over a millennium.

Translation of the Surya-Siddhanta · tr. Ebenezer Burgess, 1860