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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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20181123 Ha&CaH Solar

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ThomasHu
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20181123 Ha&CaH Solar

Post by ThomasHu » Fri Nov 23, 2018 7:14 am

Ha:SkyRover 102ED F/7 +SM90+QHY5-III-174MCamera
CaH:SkyRover72EDAPO F/6+ES PM2X+DaystarCaHQuark+QHY5-III-174M
Capture_00001.jpg
Capture_00001.jpg (471.19 KiB) Viewed 673 times
09_37_45_lapl3_ap307_l.jpg
09_37_45_lapl3_ap307_l.jpg (305.69 KiB) Viewed 673 times

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Montana
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Re: 20181123 Ha&CaH Solar

Post by Montana » Fri Nov 23, 2018 10:05 am

Really nice work Thomas :bow looks like you struggled to get all the faint proms in

Alexandra

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marktownley
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Re: 20181123 Ha&CaH Solar

Post by marktownley » Fri Nov 23, 2018 2:29 pm

Great disks Thomas!
Image
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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eroel
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Re: 20181123 Ha&CaH Solar

Post by eroel » Sat Nov 24, 2018 3:57 am

Thomas:
Very nice red effect on the first FD.
Regards,
Eric.

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yltansg
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Re: 20181123 Ha&CaH Solar

Post by yltansg » Mon Nov 26, 2018 12:01 am

Hi Thomas,

My first impression was - nice halo effect !!

Alfred

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MapleRidge
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Re: 20181123 Ha&CaH Solar

Post by MapleRidge » Mon Nov 26, 2018 1:29 am

Great FD Ha and CaK images Thomas. Getting the faint and brighter proms is always a challenge!

Brian
Brian Colville

Maple Ridge Observatory

Cambray, ON Canada

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

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FMEnage
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Re: 20181123 Ha&CaH Solar

Post by FMEnage » Mon Nov 26, 2018 3:21 am

excellent images ! cheers
-Mike

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