Joint confidence contours on the i-Ω-grid for the low-significance orbit of HD 167665 (left) and the high-significance orbit of HD 53680 (right). The contour lines correspond to confidences at the 1-σ (solid), 2-σ (dashed), 3-σ (dotted), and 4-σ (dash-dotted) levels. The crosses indicate the position of the best non-linear adjustment solution for each of the 100 draws and the star corresponds to the adopted orbit.