GEOGCS["GCS_Mercury_2000",
    DATUM["D_Mercury_2000",
        SPHEROID["Mercury_2000_IAU_IAG",2439700,0,
            AUTHORITY["ESRI","107900"]],
        AUTHORITY["ESRI","106900"]],
    PRIMEM["Reference_Meridian",0,
        AUTHORITY["ESRI","108900"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["ESRI","104900"]]