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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

Merry Christmas, Happy New Year and looking forward to a great solar cycle 25!

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Moving forward from solar cycle 24 to 25

Sun 2019 07 07

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xn44
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Sun 2019 07 07

Post by xn44 » Sun Jul 07, 2019 12:12 pm

Hello all, :hamster:

Last image with clouds. I would like to hear the opinion of Mark....

ImageSol 7 7 2019 res by Pepe Manteca, en Flickr

thanks

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marktownley
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Re: Sun 2019 07 07

Post by marktownley » Sun Jul 07, 2019 3:40 pm

Fantastic capture Pepe! It's far enough south of the equator to be cycle 25. Just looking on Solen has it designated as S6208 which it has in it's cycle 25 section http://www.solen.info/solar/cycle25_spots.html

I think I will have top get the travelling kit out and see if I can get an image in before sunset. Thanks for the heads up.
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