The center of the ellipse is
.
The focus of the ellipse is
.
The vertex of the ellipse is
.
The
-coordinate of vertex and focus are same, so the ellipse is vertical.
The standard form of vertical ellipse is
, where
is the center of the ellipse,
is the length of the major axis and
is the length of the minor axis.
The distance between center and vertex is
.
The distance between center and focus is
.
.
is the distance between center and vertex.

is the distance between center and focus.

Now
.
Substitute the values of
and
and
in
.
.
The equation of ellipse is
.
The equation of ellipse is
.