Abstract

ACKER, Agnès et al. Discovery of New Faint Northern Galactic Planetary Nebulae. Rev. mex. astron. astrofis [online]. 2012, vol.48, n.2, pp.223-233. ISSN 0185-1101.

We present the discovery of 6 nebular objects made by amateur astronomers. Four of these discoveries are clearly planetary nebulae (PNe), one is a possible PN, and another is a likely H II region. The bipolar nebula Ou4 presents the largest angular extent ever found: over one degree on the sky! We consider various scenarios that could explain such a nebula. Ou4 could be one of the nearest PNe known, though its possible PN nature will need confirmation.

Keywords : planetary nebulae [general]; surveys.

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