Claim: Bṛhaspati has four sources that measure the estimated time per sidereal revolution.
Evidence: Source Surya Siddhanta Estimated time per sidereal revolution 4,332 days, 7 hours, 41 minutes, 44.4 seconds Siddhanta Shiromani 4,332 days, 5 hours, 45 minutes, 43.7 seconds Ptolemy 4,332 days, 18 hours, 9 minutes, 10.5 seconds 20th century calculations 4,332 days, 14 hours, 2 minutes, 8.6 seconds