One cluster, two clusters, no cluster? -- The curious case of HSC 2686 and Lynga 3

Andreas Ritter, Quentin A. Parker, Xizhe Xie +1

This study was motivated by the search for Planetary Nebulae (PNe) and Open Cluster (OCs) associations. Only 5 PNe are currently in Galactic OCs among the previous $\sim 4,800$ OCs…