Transit of Saturn from outer planets
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A transit of Saturn across the Sun as seen from an outer planet (Uranus or Neptune) takes place when the planet Saturn passes directly between the Sun and the outer planet, obscuring a small part of the Sun's disc for an observer on the outer planet. During a transit, Saturn can be seen from the outer planet as a small black disc moving across the face of the Sun.
Saturn's satellites could theoretically be seen at the same time, but their angular diameter would be less than 1", and they would therefore be very hard to see.
The Saturn-Uranus synodic period is 45.36023 years (16567.82 days). The Saturn-Neptune synodic period is 35.86989 years (13101.47 days).
The mutual inclination of the orbits of Saturn and Uranus is 1.95°. The mutual inclination of the orbits of Saturn and Neptune is 0.97°.
Transits of Saturn from Uranus are quite rare. The angular diameter of the Sun from Uranus is about 1.7', however Saturn can be as far as a couple of degrees from the Sun at inferior conjunction. Coupled with a very long synodic period of more than 45 years, it takes long time to produce such a transit. The next one is on April 8, 2669, and the last was on July 18, 4635 BC.
Transits of Saturn from Neptune are also rare, but still more common than those from Uranus, again due to small angular diameter and long synodic period. Nevertheless, one takes place on May 29, 2061, and the last was on April 26, 88.
Source: [1]
| Transits of Saturn from Uranus | ||
|---|---|---|
| July 18, 4635 BC | ||
| April 8, 2669 |  |
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| Transits of Saturn from Neptune | ||
| May 5, 1886 BC | ||
| May 18, 487 BC | grazing | |
| April 26, 88 | ||
| May 29, 2061 | ||
| October 6, 3459 | ||
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