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We modelled the late-time {\it Hubble Space Telescope} imaging of RS Ophiuchiwith models from Ribeiro et al. (2009), which at the time due to the unknownavailability of simultaneous ground-based spectroscopy left some open questionsas to the evolution of the expanding nebular from the early to the late timeobservations. Initial emission line identifications suggest that no forbiddenlines are present in the spectra and that the emission lines arising in theregion of the WFPC2 F502N images are due to N{\sc ii} and He{\sc i} + Fe{\scii}. The best model fit to the spectrum is one where the outer faster movingmaterial expands linearly with time while the inner over-density materialeither suffered some deceleration or did not change in physical size. Theorigin of this inner over-density requires further exploration.

On the Evolution of the Late-time {\it Hubble Space Telescope} Imaging of the Outburst of the Recurrent Nova RS Ophiuchi (2006)