Mapping of celestial bodies with the use of triaxial ellipsoid projections

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A triaxial ellipsoid fits in the best way for presenting celestial bodies with essentially not orbicular shape. Various created projections on triaxial ellipsoidе were used by the Laboratory to map celestial bodies of irregular shape, including the modified Bugaevsky projection that had been devised and applied for the first time to Phobos mapping in the "Atlas of Terrestrial Group Planets and their Moons" (MIIGAiK, 1992). This projection is also used to represent the results of photogrammetric processing of images of minor planets and moons, including Phobos, Io, and Enceladus.

Transformation of Phobos remote sensing data onto a triaxial ellipsoid in ArcGIS

Results of Phobos mapping from a new orthomosaics (the equatorial region): the equidistant along meridians cylindrical projection for a triaxial ellipsoid; the area of the North Pole (on the left) and the area of the South Pole (on the right): the equidistant along meridians azimuthal projection for a triaxial ellipsoid

The hypsometric map of Io, compiled on the basis of the catalogue (network) of control points, created in MIIGAiK. The modified Bugaevsky projection for a triaxial ellipsoid.

The hypsometric map of Enceladus, compiled on the basis of the catalogue (network) of control points, created in MIIGAiK. The modified Bugaevsky projection for a triaxial ellipsoid.