Sub Articulo 140.3
a center environment would have no effect on the float at all (it would
not center any graphic or text) but it would cause unwanted vertical
white space coming from the environment if the float should float to
another place. So you probably don't want to do that.
minipage would have an effect but it would stop the float floating.
If you don't want to allow it to float you may as well just use
\includegraphics directly not in a figure environment (the only purpose
of which is to allow it to float)