Jigùm-dè loŋjityud assainen für evri konstelleiçionsain wa 30° in loŋjityud. In terms of: * the sidereal zodiac described here in this article the longitudes are calibrated by treating the star Aldebaran as 45° and Antares as 235° * the tropical zodiac, the longitudinal calibration is set according to the position of the Sun along the ecliptic at the moment of the vernal equinox each year