INFRARED PROPERTIES OF A LARGE RING AROUND THE LBV G79.29+0.46

G79.29+0.46 seems to be an unique object. Discovered as a nearly perfe ct ring in the radio continuum all subsequent observations are consist ent with the interpretation that it is a large ring nebula (4') around an heavily reddened LBV. Our ISOPHOT and LWS observations on board of ISO show that an infrared ring coincides with the radio ring. Line em ission does not contaminate the continuum images. The resulting dust t emperature of > 70 K) is unusually high. The LWS spectra of the 52 and 88 mu m [OIII], 63 mu m [OI], 122 mu m [NII] and 158 mu m [CII] lines are discussed. No cool neutral gas is found near the ring. A quantita tive interpretation has to await modelling of the rather complicated b ackground.