GEOGCS["Callisto (2015) - Sphere / Ocentric",
    DATUM["Callisto (2015) - Sphere",
        SPHEROID["Callisto (2015) - Sphere",2410300,0,
            AUTHORITY["IAU","50400"]],
        AUTHORITY["IAU","50400"]],
    PRIMEM["Reference Meridian",0,
        AUTHORITY["IAU","50400"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["IAU","50400"]]