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RWT 152 is one of the few planetary nebula with an sdO central star. Wepresent subarcsecond red tunable filter imaging and intermediate-resolution,long-slit spectroscopy of RWT 152, obtained with OSIRIS/GTC, which allow us todescribe in detail its morphology and to obtain its physical conditions andchemical abundances.

GTC/OSIRIS observations of RWT 152, a case study of a planetary nebula with an sdO central star