Reull Vallis on the northeastern edge of the Hellas impact basin
Reull Vallis on the northeastern edge of the Hellas impact basin
Reull Vallis extends across Promethei Terra, a mountainous region on the northeastern edge of the Hellas impact basin, for a distance of some 1500 kilometres – roughly corresponding to the length of the Rhine from its source in the Alps to its mouth. Like the Rhine, it undergoes a change in altitude of around 4000 metres as it does so. The HRSC stereo camera on Mars Express imaged the central section of Reull Vallis from an altitude of 320 kilometres during Orbit 10,657 on 14 May 2012. The landscape shown here lies in the region outlined by the smaller rectangle.
