2 mm continuum emission of comet C/2020 F3 (NEOWISE) obtained on 22 July 2020 UT with NOEMA. Top and bottom panels refer to LSB (144.8 GHz) and USB (160.2 GHz) data, respectively. Left: interferometric maps with the synthesised interferometric beam (8.5 × 4.6″ in LSB and 8.0 × 4.1″ in USB) plotted in the bottom left corner. Contour intervals are 2 × σ, σ being the map rms noise (with σ = 0.19 and 0.28 mJy beam⁻¹ in LSB and USB, respectively). Centre: total flux as a function of aperture radius. Right: real part of the visibilities as a function of baseline length expressed in units of kλ where λ is the wavelength (dots with errors); the curve shows the expected visibilities for an isotropic dust coma with a local density ∝ 1/r², where r is the cometocentric distance.