AN ASTEROID IN A EARTH-LIKE ORBIT

The dynamical evolution of an asteroid with orbital elements strikingl y similar to the Earth is analysed. The object, 1991 VG, was discovere d by the Spacewatch telescope during a particular encounter with the p lanet. 1991 VG experienced a temporary satellite capture by the Earth, a phenomena that is recurrent in its dynamical history. The possible origin of this puzzling object is discussed, including the suggestion that 1991 VG could be a piece of lunar ejecta after a great impact