Odysseus is the monstrous, shallow crater on the right. Taken by Voyager 2 on August 25, 1981.
Odysseus is the largest crater on Saturn's moonTethys. It is 400 km across, 2/5 of the moon's diameter. It is named after the Greek hero Odysseus.
Odysseus is a very shallow crater. The crater must have originally been deep, with a high mountainous rim and towering central peak. Over time the crater floor has relaxed to the spherical shape of the Tethys's surface, and the crater's rim and central peak have collapsed (similar relaxation is apparent on Jupiter's moons Callisto and Ganymede). This indicates that at the time of the Odysseus impact, Tethys must have been sufficiently warm and malleable to allow the topography to collapse; its interior may have even been liquid. If Tethys had been colder and more brittle at the time of impact, the moon might have been shattered, and even if it survived the impact, the topography of the crater would have retained its shape similar to the crater Herschel on Mimas.
On the opposite side of Tethys from Odysseus is the immense trench Ithaca Chasma, which may have formed as a result of the Odysseus impact.
