THE SPECTRUM OF THE PLANETARY-NEBULA NGC-6884

The bright, compact, moderately high-excitation planetary nebula, NGC 6884 (Perek-Kohoutek 82 +07 degrees 1) has a rich spectrum promising g ood diagnostics and offering a good target for the Hamilton Echelle Sp ectrograph at Lick Observatory. We combine International Ultraviolet E xplorer (IUE), near-UV, visual, and IR data to obtain N(ion)/N(H+) for more than 30 species from H to [Fe VI]. These diagnostics suggest a r ather large density range and an electron temperature near 10,000 K. T he relative structural simplicity of this planetary nebula makes it wo rthwhile to attempt a plausible photoionization model and deduce atomi c abundances, T, and other properties implied for the central star. I t is believed substantially improved chemical compositions are found.