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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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halpha sun of February 23rd

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stef41
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halpha sun of February 23rd

Post by stef41 » Sat Feb 23, 2019 9:11 pm

Good evening, everyone,

this morning, Dantean turbulence conditions on the sun! I don't remember ever having had such bad conditions......
Well, I still released two images reduced to 50% with the fs60, sm40 double stack, glasspath x1.25, BF10 and zwo178mm around 10h30 HL

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Image

cordially,
stephane - France

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MAURITS
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Re: halpha sun of February 23rd

Post by MAURITS » Sat Feb 23, 2019 9:17 pm

Nice FD's Stephane ...
Regards,
Maurits

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David_The_Bears_Fan
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Re: halpha sun of February 23rd

Post by David_The_Bears_Fan » Sat Feb 23, 2019 10:32 pm

Nice disks Stephane
David

Kit: Skywatcher Evostar 120 on Celestron CG-4 / Coronado PST / Lunt B1200 Ca-K Module / Lacerta Herschel Wedge/ Canon 1100D & 77D / ZWO ASI178MM & 120MC-S / QHY5-II Mono

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Re: halpha sun of February 23rd

Post by marktownley » Sun Feb 24, 2019 4:38 am

Good full disk!
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Re: halpha sun of February 23rd

Post by Montana » Sun Feb 24, 2019 6:18 pm

Very nice indeed, that filament was a beauty Saturday :bow

Alexandra

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