Ellipse fitted to deprojected scattered light disk image. Red indicates the furthest-out edge points detected above a 5 σ threshold while also satisfying a three-point step function. For the sake of clarity, only every fifth point is displayed. Blue indicates a non-constrained least-squares ellipse fitted to the detected points. The eccentricity in this case was found to be 0.626. The axes are not labelled as the ellipse fitting software uses an RA and Dec-based co-ordinate system which is unphysical for a deprojected image.