Location of Pelops (red point) on the magnitude-radius plot (bottom panel) and in relation to the surface brightness at the effective radius (middle panel) and the Sersic-index (top panel). Data from dwarf galaxies in various groups and clusters are shown as black points (Chiboucas et al. 2009; Müller et al. 2015; McConnachie 2012; Muñoz et al. 2015; Park et al. 2017; Byun et al. 2020). Indicated in blue and green are the dwarf spheroidals And XIX and Antlia 2, which are the most extended objects in the Local Group.