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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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Big Prom on July 21

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gabrieli
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Big Prom on July 21

Post by gabrieli » Sun Jul 21, 2019 8:43 pm

This prom is the a development of the prom that was in the same position on the sun as last day except that it has "bloomed" outwards. Its appearance was very feint on GONG and appeared even more so in the the live view because of the haze.
So, there was some levels work involved to make it more contrasty and stand out.

An LS152 + standard Quark Chromosphere + Blackfly S(3.2 Mp at 1536x1536 ROI) were used, unfortunately with a fairly slow shutter speed and high gain.

Lou
171b.jpg
171b.jpg (272.88 KiB) Viewed 460 times
171bc.jpg
171bc.jpg (560.05 KiB) Viewed 460 times
I used more aggressive processing in the next image to bring out a bit more detail in some areas.
171.jpg
171.jpg (502.72 KiB) Viewed 439 times
Last edited by gabrieli on Mon Jul 22, 2019 10:26 am, edited 3 times in total.
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ffellah
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Re: Big Prom on July 21

Post by ffellah » Sun Jul 21, 2019 9:27 pm

Great catch, Lou ! Beautiful detail...

Franco
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Re: Big Prom on July 21

Post by marktownley » Sun Jul 21, 2019 10:05 pm

That looks excellent Lou!
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george9
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Re: Big Prom on July 21

Post by george9 » Mon Jul 22, 2019 1:49 am

It was a spectacular prom today, so detailed. Thanks for captured the image. George
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Re: Big Prom on July 21

Post by xn44 » Mon Jul 22, 2019 6:32 am

Good image! 👍👏
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Montana
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Re: Big Prom on July 21

Post by Montana » Mon Jul 22, 2019 11:56 am

Magnificent!!! :hamster: :bow wonderful pics :hamster:

Alexandra
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gabrieli
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Re: Big Prom on July 21

Post by gabrieli » Mon Jul 22, 2019 2:39 pm

Thanks for the comments and views.

I can't wait for more of these great proms.

Lou
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MAURITS
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Re: Big Prom on July 21

Post by MAURITS » Mon Jul 22, 2019 8:12 pm

Absolutely beautiful Lou.
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Maurits

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Re: Big Prom on July 21

Post by MapleRidge » Mon Jul 22, 2019 8:28 pm

Outstanding images Lou...the resolution is very sharp.

Brian
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pedro
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Re: Big Prom on July 21

Post by pedro » Tue Jul 23, 2019 10:55 am

great prom images Lou
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