  Aegaeon (S/2008 S 1) is the last satellite discovered by the Cassini
spacecraft at the end of the 2000s. Like the satellites Methone and Anthe, it
is involved in mean motion resonance with the mid-sized Mimas. In this work, we
give a detailed analysis of the current orbit of Aegaeon identifying the
resonant, secular and long-term perturbations due to Mimas and the oblateness
of Saturn, and the effects of Tethys. For this task, we perform thousands of
numerical simulations of full equations of motion of ensembles of small bodies
representing clones of Aegaeon. We have mapped the domain of the 7:6
Mimas-Aegaeon resonance in the phase space of the semi-major axis and
eccentricity. It displays a large area dominated by regular motions associated
with the 7:6 corotation resonance surrounded by chaotic layers. Aegaeon is
currently located very close to the periodic orbit of the resonance, which
extends up to eccentricities $\sim0.025$ centered at semi-major axis
$\sim168,028$ km. We show that the current orbit of Aegaeon has an important
forced component in eccentricity due to the 7:6 resonance. The orbital
inclination of Aegaeon has a non-negligible forced value due to long-term
perturbations of Mimas. These two forced modes explain the complex perturbed
orbit of Aegaeon without requiring the co-existence of multiple resonances.

Earth and Planetary Astrophysics