GEOGCS["Mercury (2015) - Sphere / Ocentric",
    DATUM["Mercury (2015) - Sphere",
        SPHEROID["Mercury (2015) - Sphere",2440530,0,
            AUTHORITY["IAU","19900"]],
        AUTHORITY["IAU","19900"]],
    PRIMEM["Reference Meridian",0,
        AUTHORITY["IAU","19900"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["IAU","19900"]]