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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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The year in review (2018) | three lights

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pedro
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The year in review (2018) | three lights

Post by pedro » Thu Nov 29, 2018 8:07 pm

The year in review (2018) | three lights


Pedro RE' | Solar Astrophotography (2018)
Full Disk WL, CaK, H-alpha images
TV 101 F/5.4, Baader 2" Ceramic Solar Wedge
LUNT 1200 CaK Module, Coronado SM60, BF30
PGR Grasshopper GS3-U3-28S4M-C
http://re.apaaweb.com

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MapleRidge
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Re: The year in review (2018) | three lights

Post by MapleRidge » Fri Nov 30, 2018 1:19 am

An excellent animation to review the years activity Pedro...awesome work :bow

Brian
Brian Colville

Maple Ridge Observatory

Cambray, ON Canada

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

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Re: The year in review (2018) | three lights

Post by ffellah » Fri Nov 30, 2018 2:06 am

Very well done, Pedro. A large amount of data presented.

Franco


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Re: The year in review (2018) | three lights

Post by eroel » Fri Nov 30, 2018 2:23 pm

Pedro.
What a nice 2018 solar review. :D
Fuerte abrazo,
Eric.


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Re: The year in review (2018) | three lights

Post by marktownley » Sat Dec 01, 2018 2:54 am

Always good Pedro, thanks!
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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: The year in review (2018) | three lights

Post by Carbon60 » Sat Dec 01, 2018 9:44 am

A very nice review, Pedro.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
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