We examine the exterior solution of spherically symmetric and static
configuration in scalar-tensor theories by solving the differential equations
numerically and fitting the resulting data in the interested region. Our main
purpose in this work is to find out approximate analytical expressions which
are independent of the parameters of a model as much as possible. To this end,
we use the nonminimally coupled scalar field with zero potential as our sample
model. We determine the forms of the mass and the metric functions in terms of
the scalar field up to a certain order of accuracy. Then, we define a function
for the scalar field that contains only the mass and the radius of the
configuration as the parameters.
