Solar Sail Equilibria Points in the Circular Restricted Three Body Problem
Author(s)
Grøtte, Mariusz E.
Holzinger, Marcus J.
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Abstract
The Circular Restricted Three Body Problem (CR3BP) is investigated together
with the effects of solar radiation pressure (SRP) and albedo radiation pressure
acting on a solar sail spacecraft in a Sun-Asteroid system. Due to the significant
albedo effects experienced close to an asteroid with highly reflective surfaces, the
solar sail dynamics change considerably as compared to models investigated in
previous work. For approximation purposes in establishing the albedo radiation,
the asteroid is treated as a Lambertian diffuse model with characteristics from bidirectional
reflectance distribution function (BRDF). As a result of both solar and
albedo radiation, a wide range of artificial equilibrium solutions are generated in
addition to the classical Lagrange points. Particular attention is given to the solutions
around L1 and L2 with varying solar sail lightness numbers and orientation
angles. The inclusion of albedo radiation effects indicates that the equilibrium
points shift considerably as opposed to the model with SRP only, an important
fact to address for any potential missions to bright objects such as asteroids and
comets. Stability and controllability are investigated at the equilibrium points of
interest, which are found to be unstable but controllable.
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Date
2015-01
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