The following program allows you to obtain key orbital data for any probe, satellite, spacecraft or object around any world, any planet, any moon or any Dwarf Planet. You can select any world to automatically enter data by default. You can change the values of the inputs (Mass of the object in orbit, mass of the celestial or planetary body, diameter of the celestial or planetary body, altitude of the probe, satellite, spacecraft or object or Gravitational Constant). By clicking on the button "Calculate" , you obtain key data such as the orbital period of the spacecraft, the probe, the satellite or the object or the orbital speed of the probe, the satellite, the spacecraft or the object. By clicking on the button "Reset", you reset the program.