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Eclipse TableTransits of Mercury

A.14 Lunar Occultations (1 every 18.6 years; occur at night)

Four major stars lie near the ecliptic, and may be occulted by the Moon passing directly in front of them.

Occultations of these major stars occur in the following years, where n is an integer.

Regulus: 1961.8 ± 0.7 + 18.613 n, 1970.5 ± 0.7 + 18.613 n

Spica: 1957.4 ± 0.7 + 18.613 n, 1969.2 ± 0.7 + 18.613 n

Aldebaran: 1961.0 ± 1.8 + 18.613 n

Antares: 1970.2 ± 2.5 + 18.613 n

Here 1961.8 ± 0.7 refers to the interval 0.7 years on either side of 1961.8, which indicates roughly October 1961.

Occultations occur in cycles that repeat every 18.613 years due to the plane of the Moon, which is tilted to the ecliptic by about 5.1 degrees, rotating in that time.

Regulus Spica Aldebaran Antares

1961.8±0.7, 1970.5±0.7 | 1957.4±0.7, 1969.2±0.7 | 1961.0±1.8 | 1970.2±2.5

1980.4±0.7, 1989.1±0.7 | 1976.0±0.7, 1987.8±0.7 | 1979.6±1.8 | 1988.8±2.5

1999.0±0.7, 2007.7±0.7 | 1994.6±0.7, 2006.4±0.7 | 1998.2±1.8 | 2007.4±2.5

2017.6±0.7, 2026.3±0.7 | 2013.2±0.7, 2025.0±0.7 | 2016.8±1.8 | 2026.0±2.5

2036.2±0.7, 2044.9±0.7 | 2031.8±0.7, 2043.6±0.7 | 2035.4±1.8 | 2044.6±2.5

Occultations occur each lunar month (that is, each 27.321 days) during the above periods. Thus, Regulus is occluded by the Moon every lunar month from the year 1961.1 to 1962.5; that is, February 1961 to June 1962.

Lunar occultations repeat every 18.613 years (6798.36328 days).

See EclipseBegin[Earth, Moon, star, neardate].

Eclipse TableTransits of Mercury



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