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Published online by Cambridge University Press: 07 August 2017
The planetary nebula Hubble 5 shows a very striking bi-symmetry; a 180° rotation around its center would bring the object into fair coincidence. Similar to this nebula is NGC 6537 and, to a lesser degree, NGC 6302. Jet outflows are reported from this “post-main sequence” nebula over a range of 260 km s−1 (Phillips and Mampaso, 1988). Otherwise not much has appeared on this object in the literature.