Using of close encounters of minor planets for the improvement of their masses.

(*) Astronomical Observatory. University of Valencia, Spain
(#) Department of Astronomy and Astrophysics. University of Valencia, Spain
(+) Institute of Theoretical Astronomy. St.Petersburg, Russia

The orbits of 6807 numbered and 19416 unnumbered minor planets on interval 1900-2020 are being integrated. The minimum distances between the orbits of minor planets will be considered as a filter for close encounters investigation. The possibility of determining of masses for asteroids with close encounters with each other will be investigated, including simulation of several kind of situations. The needed interval, number and accuracy of observations for the improvement of masses are being applied to past approaches and will be considered for the future ones.

References:
J.L.Hilton et al. Prospects for Finding Asteroid Masses. Paper presented at IAU Symp. 172 (Paris, 3-8 July 1995)