What ISRO scientiists say
After the lift-off at the Satish Dhawan Space Centre here, the scientists will start placing the spacecraft at Low Earth Orbit initially, and later it will be more elliptical.
According to scientists, there are five Lagrangian points (or parking areas) between the Earth and the Sun where a small object tends to stay if put there. The Lagrange Points are named after Italian-French mathematician Joseph-Louis Lagrange for his prize-winning paper -- "Essai sur le Problème des Trois Corps, 1772." These points in space can be used by spacecraft to remain there with reduced fuel consumption.
At a Lagrange point, the gravitational pull of the two large bodies (the Sun and the Earth) equals the necessary centripetal force required for a small object to move with them.
The spacecraft would be launched towards the Lagrange L1 point using on-board propulsion so that it exits the earth's gravitational Sphere of Influence and cruises towards the L1. Later, it would be injected into a large Halo Orbit around L1 point near the Sun.
The total time from launch to reaching the L1 point would be about four months for the Aditya-L1 Mission, ISRO said.
