Map of the C¹⁸O(1–0) integrated intensity towards the L1517 cloud superposed to the red DSS image. The emission has been integrated over the whole velocity range of detection (V_LSR = 5.25−6.45 km s^-1). First contour and contour interval are 0.22 K km s^-1. The two bright stars surrounded by nebulosity and located near the southeastern edge of the C¹⁸O(1–0) emission are AB Aur (brightest) and SU Aur.