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Very recently, the discovery of the largest known planetary nebula on the skysurrounding the DO white dwarf PG1034+001 with an apparent diameter of about 2degrees, corresponding to a linear diameter of 3.5 - 7.0 pc at the likelydistance of 100 - 200 pc, has been reported by Hewett et al. (2003). A carefulinspection of available sky survey data has now shown that this planetarynebula, Hewett 1, is surrounded by an elliptical emission shell with anapparent diameter of 6 times 9 degrees (16.2 +6.1/-4.5 times 24.3 +9.1/-6.8 pcat d = 155 +58/-43 pc. A further emission structure, detected northeast of thecentral star may indicate another shell with a size of 10 times 16 degr. Frompresently available observational data we do not have indications whether theemission arises from material which was ejected from PG1034+001 or from ionizedambient ISM.  Improved proper motion data combined with radial velocity and distance fromthe literature have enabled us to derive a Galactic orbit for the central starPG1034+001. Its thin disk orbit and the morphology of the first halo suggestthat the nebula is in an advanced stage of interaction with the interstellarmedium.Comment: 4 pages, 3 figure

On the discovery of an enormous ionized halo around the hot DO white dwarf PG 1034+001