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Equinox Conundrum
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Question
Puffy MacCloud
I’ve always recognised the 21st of September as the Autumn Equinox. Until now. Because it isn’t. Or not here.
According to the BBC Weather App for my village, sunrise this morning was at 07:00 (06:00 GMT) and sunset will be at 19:20 (18:20 GMT), which means that the noxes are not equi. That doesn’t happen until the 25th of September when sunrise will be at 07:08 and sunset will be at 19:10. (That’s as close as it gets.)
So why, oh why, is there an offset from the expected result? I guess that the ten-minute slide is due to the longitudinal westerly component from Greenwich to here, and I further hypothesise that the four-day delay is due to the fifty-five and a bit degrees of latitude and a diminishing horizon, but I’m not at all convinced that I’m right.
Anyone know how and why I must wait four days for my village Equinox?
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