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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 22nd

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stef41
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halpha sun of February 22nd

Post by stef41 » Fri Feb 22, 2019 7:25 pm

Good evening, everyone,

A priori good weather everywhere today in France..... except where I am! :(
I still found a micro brightening before the sun went down behind a Vosges summit to make a quick little picture.
development and adjustment of the FP made by tearing it off, and use of the flat from the previous day always at fs60 and sm40 double stack, glasspath x1.25, BF10 and zwo178mm at 50% at 14h19 UT

Image

cordially,
stephane - France

Translated with www.DeepL.com/Translator

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ffellah
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Re: halpha sun of February 22nd

Post by ffellah » Fri Feb 22, 2019 8:16 pm

Very nice FD.

Franco

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Re: halpha sun of February 22nd

Post by MAURITS » Fri Feb 22, 2019 8:56 pm

Nice work Stephane ...
Regards,
Maurits

Vista del Cielo Observatory

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Re: halpha sun of February 22nd

Post by MapleRidge » Sat Feb 23, 2019 12:44 am

Great FD image Stephane :bow

Brian
Brian Colville

Maple Ridge Observatory

Cambray, ON Canada

Photos: https://www.flickr.com/photos/185395281@N08/albums

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Carbon60
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Re: halpha sun of February 22nd

Post by Carbon60 » Sat Feb 23, 2019 8:18 am

Nice FD.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
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More images at http://www.flickr.com/photos/solarcarbon60/

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Re: halpha sun of February 22nd

Post by David_The_Bears_Fan » Sat Feb 23, 2019 9:30 am

Great disk 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 22nd

Post by Montana » Sun Feb 24, 2019 6:14 pm

Superb Stephane :bow I think the good weather finally made it to the UK too this weekend :hamster:

Alexandra

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