Quote:
Originally Posted by ozskywatcher
Thanks. I wasn't aware of that site. I unfortunately now have a slightly different question to ask - which I will post in the Software section of IceinSpace. Xavier's site calculates percentages for maximum BUT only if maximum occurs before the Sun sets. It doesn't do it if maximum occurs after Sunset. Arrg!!
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Paul, you have to use the obscuration value, not the magnitude.
The magnitude is the fraction of the Sun’s diameter covered by the Moon at maximum eclipse. However the obscuration is the percentage of the Sun’s disk surface covered at maximum eclipse (displays "???" if the Sun is below the horizon at maximum eclipse).
Both values are usually computed only at maximum eclipse.
To compute the obscuration for areas where the Sun at maximum eclipse is under the horizon would involve the computations of sunrise/sunset time. This is done by my
Solar Eclipse Maestro software.
Xavier