The partial solar eclipse of 2022 October 25

The partial solar eclipse of 2022 October 25 is visible from the eastern strip of Greenland, Iceland, Europe except Portugal and most of Spain, some northern and eastern parts of Africa and western Asia.

The eclipse achieves its greatest magnitude – the proportion of the Sun’s diameter which is obscured by the Moon – of 0.86 at 11:00 UT during sunset over the West Siberian Plain, around longitude 77°E, latitude 62°N.

The eclipse takes place at the Moon’s descending node and is the second in the final run of partial eclipses in a series which ends in 2347.

Figure 1. Extent of the eclipse over the British Isles.

Figure 2. Appearance at greatest eclipse.

In the British Isles the eclipse is visible in the morning, its magnitude ranging from 0.15 along the Kerry and Cork coast to 0.41 in Shetland. The extent of the penumbra over the British Isles is illustrated in Figure 1, from which it is possible to determine the time and magnitude of greatest eclipse for any location. For example, we find at Edinburgh maximum takes place at 09:56 UT with a magnitude of 0.31, while at Greenwich greatest eclipse occurs at 09:59 UT, the magnitude being 0.26.

The table gives some local circumstances. P indicates the angle of the Moon’s centre measured from the north point of the solar disc through east, while V represents the corresponding angle reckoned anticlockwise from the vertex of the solar disc. Finally, Figure 2 illustrates the appearance of greatest eclipse for some places.


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