Submillimeter-wave spectroscopy of the KÂ =Â 2-1 subband of the Ne-CO complex

► Rotational spectrum of Ne-CO has been measured in the frequency range 208-230 GHz. ► The K = 2-1 subband has been detected for the first time in the νCO = 0 state. ► Improved molecular parameters of the Ne-CO complex were obtained. ► Available intermolecular potential energy surfaces of the Ne-CO system were tested.