Interferometric maps of the 3.3 mm continuum emission of comet 17P/Holmes obtained on 27 and 28 October 2007 UT with PdBI. Top: full set of measurements. Bottom: maps constructed using the same uv-coverage, i.e., from data acquired with 5 antennas and between 2h00 and 7h00 UT for both dates. The interferometric beam is plotted in the bottom left corner. The maps have been centred on the position of maximum brightness. The arrow represents the Sun direction projected on the sky. The level spacing is 2σ, with σ = 0.093 (top figure) and 0.10 (bottom) mJy/beam for 27 October, and σ = 0.12 (top) and 0.14 (bottom) mJy/beam for 28 October.