In this work we have acquired a value for angle of the cone of the Earth's shadow, by studing a total lunar eclipse of maximal duration. We have asssumed knowledge about the value the Moon's orbital period, the average distance Earth-Moon and the Earth's diameter. We have combined these quantities with a geometric parameter obtained through the image processing of the lunar eclipse photo. The results were compared with the current values of the apparent diameters of the Moon and the Sun.
Keywords:
Eclipse of the Moon; apparent diameter
