A lunar occultation of the radio source 06N2A in Gemini was observed in the course of an investigation at a wavelength of 3�5 m, for which the "Mills Cross" aerial was employed. During the occultation the intensity of the source was reduced by over one-fifth, although less than one-tenth of the associated galactic nebulosity IC 443 was obscured. The radio source appears to resemble the nebula, and the relation between them is discussed with the aid of simple geometrical models of the source.