Transit of Mercury from Uranus

A transit of Mercury across the Sun as seen from Uranus takes place when the planet Mercury passes directly between the Sun and Uranus, obscuring a small part of the Sun's disc for an observer on Uranus. During a transit, Mercury can be seen from Uranus as a small black disc moving across the face of the Sun.

Naturally, no one has ever seen a transit of Mercury from Uranus, nor is this likely to happen in the foreseeable future. Nevertheless, the next one will take place on October 26, 2020.

A transit could be observed from the surface of one of Uranus' moons rather than from Uranus itself. The times and circumstances of the transits would naturally be slightly different.

The Mercury-Uranus synodic period is 88.221 days. It can be calculated using the formula 1/(1/P-1/Q), where P is the sidereal orbital period of Mercury (87.969 days) and Q is the orbital period of Uranus (30,799.095 days).

Transits of Mercury from Uranus are empirically observed to occur in clusters, with two such clusters every 40 years or so.

Transits of Mercury from Uranus (2001-2100)
October 26, 2020[1] January 23, 2021 April 21, 2021 July 18, 2021
October 14, 2021 January 10, 2022 April 8, 2022 July 5, 2022
October 1, 2022 December 29, 2022 March 27, 2023 June 23, 2023
September 19, 2023 December 16, 2023 March 13, 2024 May 20, 2061
August 17, 2061 November 13, 2061 February 9, 2062 May 9, 2062
August 5, 2062 November 1, 2062 January 29, 2063 April 27, 2063
July 25, 2063


See also

  • Astronomical transit

External links

  • JPL Horizons
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