Fig. 3
Orbital plot for HD 180617 b around its host star. The red ellipse corresponds to the best-fit solution, while the dashed ellipses represent the orbits at the upper and lower 1σ uncertainty levels of the eccentricity. The conservative liquid water habitable zone according to Kopparapu et al. (2014), shaded in green, is given by 0.19 au ≤ a ≤ 0.36 au. Separations are in units of astronomical units.
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