@InProceedings{MarchiVendMisrPrad:2018:EfEaPe,
author = "Marchi, Luis Ot{\'a}vio and Venditti, Flaviane and Misra, Arun
and Prado, Antonio Fernando Bertachini de Almeida",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Arecibo
Observatory} and {Mc Gill Institute for Aerospace Engineering} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Effect of earth-moon perturbation ont he deflection of tethered
asteroid systems",
year = "2018",
organization = "International Astronautical Congress, 69.",
abstract = "In recent years, several celestial bodies with different shapes
and sizes have been detected as they approach dangerously the
Earths orbit. The threat of an impact with our planet has
encouraged many studies of Potentially Hazardous Asteroids (PHA).
In the literature, one can find several techniques for the
deflection of PHAs according to the available time to plan and
execute the mission. In 2022, for example, NASAs DART mission
plans to perform the first kinetic impact experiment of a
spacecraft on the moon of a double asteroid system. In this work,
a previously studied deflection method is considered, which
consists of a PHA connected to a smaller asteroid with a tether.
The physical principle of the chosen technique is the displacement
of the center of mass of the system. The dynamics of all bodies
involved are assumed to be on the plane of the PHA, therefore
asteroids Bennu and Itokawa were adopted for having low
inclination orbit. The tethered system rotates with the angular
velocity of the main body due to the constraint imposed by
connecting the two bodies with a tether (rigid and negligible
mass). The focus of the present work is to analyze the influence
of the Earth-Moon perturbation on the dynamics of the
PHA-tether-asteroid system. It is expected that this effect
becomes more evident in regions of orbital interaction between the
planet and these rocky bodies. The effects of the gravitational
perturbation caused by the interaction between the binary asteroid
system and the Earth-Moon system is quantified as the difference
between the perturbed and unperturbed positions of the PHA after a
certain time, and also its minimum distance from the Earth. The
tether technique was adopted as a solution to avoid fragmentation
debris that can be generated by the impact method, allowing to
deflect the whole body without causing unpredictable consequences.
In addition, another application would be to transfer these bodies
closer to the Earths orbit to explore them scientifically as well
as commercially. In this regard, the ongoing Osiris-Rex mission
plans to collect a small sample of asteroid Bennu, which can
possibly provide important information about the origin of the
Solar System.",
conference-location = "Bremen",
conference-year = "01-05 oct.",
language = "pt",
targetfile = "IAC-18,marchi.pdf",
urlaccessdate = "07 maio 2024"
}