(The Gist of Science Reporter) Special Orbit

 [SEPTEMBER-2019]

Special Orbit

• LOP-G will circle the Moon every six days swooping in between 1500 km to 70000 km distances from the surface.
• The Gateway will be placed in a unique orbit called the highly elliptical Near Rectilinear Halo Orbit (NRHO).
• A halo orbit is a three-dimensional periodic orbit operating between the gravitational pull of two planetary objects and the centrifugal accelerations on the satellite.
• Halo orbits utilise the Lagrange points — technical points in orbital mechanics to fix the trajectories.
• Robert W. Farquhar first advocated halo orbits. A spacecraft in such an orbit would be in continuous view of both the Earth and the far side of the Moon.
• LOP-G s trajectory is based on this concept to ensure that it will be at all times in communication with the earth, and avoid the shadow region of the moon.

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Courtesy: Science Reporter