The Astronomical Observatories of Jai Singh c15.s1.t3.14

c15.s1.t3.14

² Varāha Mihira’s summary of this work differs in some details from the text now in use, but not essentially, e.g., the length of the sidereal year in the two works is: Old Sūrya Siddhānta 365ᵈ 6ʰ 12ᵐ 36ˢ. Modern Sūrya Siddhānta 365ᵈ 6ʰ 12ᵐ 36·56ˢ. The text now accepted possibly dates from about A.D. 1100, while the earlier limit for the original Sūrya Siddhānta is about A.D. 400.