Color composite image of the young open cluster AP 210, constructed from archival HST/ACS observations in F475W (blue), F625W+F658N (green), and F814W (red). The PN appears as a bright blue–green point source near the cluster center because of its strong [O III], Hα, and [N II] emission. The white circle indicates the ﹩1\mathop{.}\limits{^{\prime\prime} }5﹩ on-sky diameter of a single Hectospec fiber.