The manuscripts of these texts exist in slightly different versions, present Shani's motion in the skies, but vary in their data, suggesting that the text were open and revised over their lives. The texts slightly disagree in their data, in their measurements of Shani's revolutions, apogee, epicycles, nodal longitudes, orbital inclination, and other parameters. For example, both "Khandakhadyaka" and "Surya Siddhanta" of Varaha state that Shani completes 146,564 revolutions on its own axis every 4,320,000 earth years, an Epicycle of Apsis as 60 degrees, and had an apogee (aphelia) of 240 degrees in 499 CE; while another manuscript of "Soorya Siddhantha" revises the revolutions to 146,568, the apogee to 236 degrees and 37 seconds and the Epicycle to about 49 degrees.