Job to publish any official Papyrus component as an update site with or not the linked RCP.
http://download.eclipse.org/modeling/mdt/papyrus/components/sysml16/
Check eclipse in http://download.eclipse.org/eclipse/downloads/drops4/ (/R-4.12-201906051800/)
Check eclipse in http://download.eclipse.org/eclipse/downloads/drops4/ (/R-4.12-201906051800/)