Sagan class tourist ships do not have any landing pads, small, medium or large. They've (presumably) got the little docking hatch on their sides that most un-dockable megaships and un-dockable installations seem to have and that looks like something Viper-sized or smaller could fit into, but it's just there for decoration. NO-one can dock at them. Sagan-class tourist ships are just there to be looked at - or raided for mats, if you're feeling malevolent.