K_s band image of the M 82 nuclear peak emission obtained from 2MASS in grey scale (fainter emission is cut out), overplotted by positions of the X-ray source, Xp9 (white), radio source 43.21+61.3 (red; Rodriguez-Rico et al. 2004), H I kinematic centre (green; Weliachew et al. 1984), Ne II kinematic centre (blue; Achtermann & Lacy 1995), H92α ring centre (cyan; Rodriguez-Rico et al. 2004), WISE peak (yellow; Jarrett et al. 2019), and two previous 2.2 μm peak measurements (R80: Rieke et al. 1980; L90: Lester et al. 1990). The positional error is ∼0.5″ for each measurement, which is represented by the circle, apart from the 2.2 μm position of Rieke et al. (1980). The image orientation is north up, east to the left.