31189 Tricomi (1997 YZ7) Tricomi (asteroid 31189) is a main-belt asteroid of the 2.0415251 AU named after the Italian mathematician Francesco Tricomi. It has an eccentricity of 0.1941091 and an orbital period of 1 472.67 days (4.03 years).Tricomi has an orbital speed average of 18.71343435 km / s and an inclination of 10.48622 thereof.It was discovered on December 27 1997 by P. G. Comba at Prescott.
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