Comets with very similar elements passed through perihelion on January 31, 1790, February 24, 1858, September 11, 1885.

Comets with very similar elements passed through perihelion on January 31, 1790, February 24, 1858, September 11, 1885. If this is the same comet, then what is the period of its revolution around the Sun and what is the semi-major axis of its orbit?

Period 13.7 years; a = 5.72 a.u. This is Tutl’s periodic comet.

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