Don Pollacco, APS Division, Department of Pure & Applied
Physics, Queen's University of Belfast, Belfast, BT7 1NN, UK
The current state of knowledge of the faint nebula surrounding V4334 Sgr is reviewed. The expansion velocity, ionic abundances and physical conditions of the plasma are typical of evolved planetary nebulae, although there may be some indications that recombination has begun (critically dependent on the electron density). Several attempts have been made to derive the pre-outburst physical properties of the star from static modeling of the nebula. In each case the observed nebula properties are consistent with a 100000K ionising source - probably at the top of the white dwarf cooling curve, as expected from a pre-shell flash object.