The distribution of Titan's high-altitude (out to ∼50,000 km) exosphere from energetic neutral atom (ENA) measurements by Cassini/INCA

► Titan's H2 exosphere extends at least out to the gravitational Hill sphere (∼50,000 km altitude). ► Consistent with Chamberlain escaping and satellite distribution beyond 10,000 km altitude. ► Retrieval of Titan's H2 exosphere using Energetic Neutral Atom (ENA) imaging. ► No indication of H2 Titan torus with densities >1000 cm−3. ► Slight deviations from spherical symmetry warrant further analysis.