Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s2.t17.2

v2.c12.s2.t17.2

He was a famous astronomer, who compiled works on all the three branches of astronomy. Let us consider his probable date. He has nowhere mentioned his date explicitly. But he has already mentioned in his Karaṇa work named Pañcasiddhāntikā that he has adopted Śaka 427 as the starting year. He must have been at least 20 years old, if he had compiled the work then. It is impossible that such a work could have been written at an earlier age and from this we can take Śaka 407 as the approximate year of his birth. A line is often quoted in support of the date of his death. It runs as follows :—