Weak cometary activity of Centaur P2. (Left) Comparison of the averaged P2 profile (black points; error bars on points are due to the dispersion of values among the four extracted profiles) with the average stellar PSF profile (continuous line). (Middle) P2 SBP comparison with the stellar SBP, for four air mass values during the night (the thick line is the average value). (Right) Run of the SExtractor FLUX_RADIUS classifier (see text for details) as a function of the instrumental magnitude. The red dots represent the individual sources, while the blue square marks the position of P2. The straight horizontal sequence is formed by sources classified as sure stars. P2 is clearly above this sequence in the extended sources region.