Theoretical-Observational Comparisons and Details in the Evolution of Sakurai's Object

We create a grid of evolutionary models which include models thatexhibit born-again behavior; that is a very late helium pulse. Ourmodels include metalicities between Z = 0.001 and Z = 0.020. Massloss is varied beginning at the peak of the last thermal pulse onthe AGB. By doing this, we determine the range of helium mass atAGB departure that later produces a very late helium flash. Wepresent a direct comparison between our models, Sakurai's Object andFG Sge. Based on our comparisons, we make an observable predictionfor the future of Sakurai's Object: We expect it to increase intemperature and decrease slightly in luminosity within the next 20to 70 years and then to cool and brighten a second time with alonger time scale of roughly 200 to 500 years. It will become asFG Sge is now.