Titian crater. Mosaic image of the Titian crater on the surface of Mercury. This crater measures 121 kilometres in diameter. Created by combining images taken with all 11 filters of the wide-angle camera (WAC) onboard NASA's MESSENGER (MErcury Surface Space ENvironment GEochemistry and Ranging) spacecraft and comparing and contrasting them to accentuate differences on the planet's surface. Here, the smooth floor of Titian is a brighter orange colour than the surrounding area, likely due to being filled with volcanic material. Ejecta appear blue and cover much of the surface surrounding the crater. Later impacts (yellow) excavated material from below the Titian ejecta. This material was present at or near the surface before the impact that created Titian