H i total intensity map, derived from data with 6 kλ tapering (see Sect. 4.2). Contour levels are (1,2,3...9)×6.6 Jy beam^-1 m s^-1. This image was derived by summing the emission over the velocity range from 2.6 km s^-1 to 11.6 km s^-1; to minimize the noise contribution to the map, data that did not exceed a 2σ threshold after smoothing the data spatially and spectrally by a factor of 3 were blanked. The star symbol marks the stellar position of RS Cnc.