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HM Nautical Almanac Office: Transits of Venus

1526 May 23rd Transit of Venus


Global Visibility of the 1526 Transit of Venus

Venus crossed the disc of the Sun on 1526 May 23rd. The map above shows the visibility of the event. The entire transit could have been seen from the northern Scandinavia, North and Central America, the north-western part of South America, the eastern half of the Hawaiian Islands, the islands of the eastern Pacific Ocean and northern Russia. The Sun set while the transit was in progress in the grey area encompassing western Russia, Europe including the British Isles, northern and western parts of Africa and South America except the north-western part. The Sun rose while the transit was in progress in the grey area taking in Australasia except the western half of Australia, the islands of the western Pacific Ocean, Eastern Asia and Japan. The yellow lines on the diagram show the position of the terminator, where the Sun is either rising or setting, at the key phases of the transit.

Geocentric Circumstances

Geocentric Circumstances of the 1526 Transit of Venus

The geocentric circumstances of the transit are shown in the diagram above. During the transit, the diameter of the Sun is 1890.1 arcseconds and that of Venus is 57.7 arcseconds. In other words, the diameter of Venus is 0.03 that of the Sun, making it look like a rapidly moving sunspot. The minimum separation between the centre of the solar disc and Venus was around 666.7 arcseconds. The whole transit lasts just under six hours.

All timings are given in Universal Time (UT).

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Last modified: Tuesday, 03 May 2011 at 14:02:15 BST