A textbook on astronomy authored by Śatananda Ācarya in 1099, based on Varāhamihira’s summary of Lāṭadeva’s recension of the Sūryasiddhānta by Āryabhaṭa I (fifth–sixth centuries CE), which helped to popularize it throughout northern and eastern India (Pingree 1981). The manuscript was written by Divākara Dvija in 1837.