@Article{AljbaeeChCaSoPrAm:2017:DyEnAs,
author = "Aljbaee, S. and Chanut, T. G. G. and Carruba, V. and Souchay, J.
and Prado, Antonio Fernando Bertachini de Almeida and Amarante,
A.",
affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universidade
Estadual Paulista (UNESP)} and {Universidade Estadual Paulista
(UNESP)} and {Observatoire de Paris} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista
(UNESP)}",
title = "The dynamical environment of asteroid 21 Lutetia according to
different internal models",
journal = "Monthy Notices of the Royal Astronomical Soceity",
year = "2017",
volume = "464",
number = "3",
pages = "3552--3560",
month = "Jan.",
keywords = "gravitation, celestial mechanics, minor planets, asteroids:
individual: (21) Lutetia.",
abstract = "One of the most accurate models currently used to represent the
gravity field of irregular bodies is the polyhedral approach. In
this model, the mass of the body is assumed to be homogeneous,
which may not be true for a real object. The main goal of the this
paper is to study the dynamical effects induced by three different
internal structures (uniform, three- and four-layered) of asteroid
(21) Lutetia, an object that recent results from space probe
suggest being at least partially differentiated. The Mascon
gravity approach used in the this work consists of dividing each
tetrahedron into eight parts to calculate the gravitational field
around the asteroid. The zero-velocity curves show that the
greatest displacement of the equilibrium points occurs in the
position of the E4 point for the four-layered structure and the
smallest one occurs in the position of the E3 point for the
three-layered structure. Moreover, stability against impact shows
that the planar limit gets slightly closer to the body with the
four-layered structure. We then investigated the stability of
orbital motion in the equatorial plane of (21) Lutetia and propose
numerical stability criteria to map the region of stable motions.
Layered structures could stabilize orbits that were unstable in
the homogeneous model.",
doi = "10.1093/mnras/stw2619",
url = "http://dx.doi.org/10.1093/mnras/stw2619",
issn = "0035-8711",
language = "en",
targetfile = "aljbaee.pdf",
urlaccessdate = "25 abr. 2024"
}