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Is there anyway to find the leading-edge's center of curvature of a NACA Airfoil?

I'm trying to transform a NACA airfoil into a near-circle using the inverse Karman-Trefftz transformation. the transformation has 2 singularity points, s1 which is located on the trailing edge, and s0 is located midway between the leading edge nose and its center of curvature.. now for symmetrical airfoils it's easy to find s0, since the center of curvature is on the x axis, and the leading edge radius formula is known, but for cambered airfoils it's a bit complicated with MATLAB, I've done all the hard work, and now stuck here.

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    $\begingroup$ Possible duplicate of What does leading edge radius mean? $\endgroup$ – Carlo Felicione Oct 8 '18 at 0:47
  • $\begingroup$ Leading-edge radius r=1.1019(t), where t is the airfoil thickness.... but how can i find the center of the circle in the leading edge if i only know the radius ?? $\endgroup$ – Ali Oct 8 '18 at 7:40

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