Transit of Mercury from Neptune

A transit of Mercury from Neptune occurs when Mercury appears to pass in front of the sun, as seen from Neptune. The average synodic period is 88 days, and the mutual inclination is 7 degrees.

When Mercury begins to make passages through the nodes (relative to Neptune's orbit), many transits result. For example, 19 transits took place from February 1956 to June 1960 at 88-day intervals. There were no more transits until November 2037—a gap of 321 synodic years. This began a string of 25 transits followed by another string beginning 683 synodic periods later than the start of the first one. The first and third both took place at the ascending node, the middle one the descending.

Transits

Beginning 1956	Beginning 2037	Beginning 2120
February 15, 1956	November 30, 2037	November 12, 2120
May 14, 1956	February 26, 2038	February 9, 2121
August 10, 1956	May 25, 2038	May 8, 2121
November 6, 1956	August 22, 2038	August 4, 2121
February 2, 1957	November 18, 2038	October 31, 2121
May 1, 1957	February 14, 2039	January 27, 2122
July 28, 1957	May 13, 2039	April 25, 2122
October 24, 1957	August 9, 2039	July 22, 2122
January 21, 1958	November 5, 2039	October 18, 2122
April 19, 1958	February 1, 2040	January 15, 2123
July 16, 1958	April 29, 2040	April 4, 2123
October 12, 1958	July 26, 2040	July 10, 2123
January 8, 1959	October 22, 2040	October 6, 2123
April 6, 1959	January 18, 2041	January 2, 2124
July 3, 1959	April 16, 2041	March 30, 2124
September 29, 1959	July 13, 2041	June 26, 2124
December 27, 1959	October 9, 2041	September 23, 2124
March 24, 1960	January 5, 2042	December 20, 2124
June 20, 1960	April 3, 2042	March 18, 2125
	July 1, 2042
	September 27, 2042
	December 24, 2042
	March 22, 2043
	June 18, 2043
	September 14, 2043

References

• SOLEX, by Aldo Vitagliano
• transits from Neptune for 1000-3000