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Лан Аньци
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Инженерный журнал: наука и инновации
# 7·2017
Analysis of spacecraft trajectories for the space mission
Earth — Apophis — Earth and the spacecraft orbital
motion around the asteroid Apophis
© Lang Anqi
Bauman Moscow State Technical University, Moscow, 105005, Russia
It is of great current interest to organize a space mission to explore the "dangerous" aster-
oid Apophis
in order
to research its surface using a landing device and
to conduct remote
investigation with the instruments of this device
using a satellite near Apophis.
This paper
defines and examines the trajectories for the spacecraft flight (with a special mini-device)
to the asteroid Apophis,
staying there for some time and coming back to the Earth. We have
estimated economical trajectories for this mission provided that it would last for two years -
from 2019 to 2022. We have analyzed the task of the spacecraft motion around the asteroid
taking into account three types of perturbations:
the gravitational effects of some distant
celestial bodies (Sun, Earth, Moon, Venus and Jupiter), the
non-spherical structure of
Apophis and the solar radiation pressure (SRP). The article considers two possible types of
spacecraft:
the main spacecraft, which is expected to come back to the Earth after staying
around Apophis for about a week or a month,
and a special mini-satellite, with a long stay
around the asteroid
for clarifying the asteroid orbit.
Keywords:
space mission to asteroid Apophis, optimal trajectories, satellite orbital mo-
tion around asteroid Apophis, nonsphericity of the asteroid, solar radiation pressure,
duration of spacecraft motion around Apophis
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