Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s3.86

v2.c12.s3.86

This can be said to be the definition of Vikṣepa according to our ancient works. When the planet is at its mean distance from the earth, it is not necessarily situated at a place 3 signs apart from the node. If the planet is situated 90° away from the node, and its distance from the earth also happens to be equal to its mean value, then the latitude of the planet is regarded by our astronomers as the planet’s mean maximum Vikṣepa. This does not take into consideration the factor of planet’s radius vector. The latitude of a “superior*” planet is not much affected by the variation in the value of its radius vector but they do cause a difference in the latitudes of “inferior*” planets. Hence, there is no harm if the Vikṣepa values of planets other than Mercury and Venus as given by our works are compared with modern values ; and such a comparison will reveal that our works, as far as the Vikṣepas of