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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.

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Promtastic Sunday - 8th September

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marktownley
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Promtastic Sunday - 8th September

Post by marktownley » Sun Sep 08, 2019 2:31 pm

The suns disk is blank, really blank! not much at all is happening, but today all the action was around the limb in the form of prominences. There were lovely sets on both limbs in the northern hemisphere. This image has an inverted disk with a limb composite, taken with the Coronado SM90ii and the PGR Grasshopper camera.

ImageHa-Disk by Mark Townley, on Flickr
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http://brierleyhillsolar.blogspot.co.uk/
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MAURITS
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Re: Promtastic Sunday - 8th September

Post by MAURITS » Sun Sep 08, 2019 6:26 pm

Indeed lovely proms Mark.
Regards,
Maurits

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Re: Promtastic Sunday - 8th September

Post by Starry Jack » Sun Sep 08, 2019 6:37 pm

I love it when you folks get to the sun before us in the west US. It’s my ‘weather report ‘.

Nice work in the capture.
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marktownley
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Re: Promtastic Sunday - 8th September

Post by marktownley » Sun Sep 08, 2019 7:27 pm

Thanks guys!
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Re: Promtastic Sunday - 8th September

Post by ffellah » Mon Sep 09, 2019 12:10 am

Nice disk, Mark

Franco

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Re: Promtastic Sunday - 8th September

Post by eroel » Mon Sep 09, 2019 1:27 am

Mark, a nice FD.
Eric.

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Re: Promtastic Sunday - 8th September

Post by DeepSolar64 » Mon Sep 09, 2019 1:36 am

You guys often have some images posted before I get my scope out to look. You give me a very good idea what to look for. I also use the GONG network and SDO images.

I second Starry Jack's comment!
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