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Thread started 11 Apr 2018 (Wednesday) 15:42
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Solar prominences in Hydrogen Alpha, April 11th 2018

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MalVeauX
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Apr 11, 2018 15:42 |  #1

Some solar features today in 656.28nm (Hydrogen Alpha):

IMAGE: https://farm1.staticflickr.com/887/39582045290_4657fed6a2_c.jpg
IMAGE LINK: https://flic.kr/p/23iJ​k3J (external link) PromGroup_HA_BW_041120​18 (external link) by Martin Wise (external link), on Flickr

Fujifilm X-T1 • (Unspecified manufacturer) Telescope @2100mm • 1/100 • f/32 • ISO 800
IMAGE: https://farm1.staticflickr.com/876/27521294308_17054ee60b_c.jpg
IMAGE LINK: https://flic.kr/p/HVXP​Yh (external link) PromGroup_HA_Colored_0​4112018 (external link) by Martin Wise (external link), on Flickr

IMAGE: https://farm1.staticflickr.com/880/41348307142_04dfd75ec0_c.jpg
IMAGE LINK: https://flic.kr/p/25ZN​Tah (external link) BigProm_HA_BW_04112018 (external link) by Martin Wise (external link), on Flickr

Fujifilm X-T1 • (Unspecified manufacturer) Telescope @4200mm • 1/100 • f/32 • ISO 800
IMAGE: https://farm1.staticflickr.com/784/39582046750_21dd2cf747_c.jpg
IMAGE LINK: https://flic.kr/p/23iJ​ktU (external link) BigProm_HA_Colored_041​12018 (external link) by Martin Wise (external link), on Flickr

Full disc in 393nm (Calcium), very quiet:

IMAGE: https://farm1.staticflickr.com/890/27521295388_88e2814db8_c.jpg
IMAGE LINK: https://flic.kr/p/HVXQ​hU (external link) Disc_CA_04112018 (external link) by Martin Wise (external link), on Flickr

Very best,

My Flickr (external link) :: My Astrobin (external link)

  
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andicus
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Apr 11, 2018 16:01 |  #2

Beautiful images again, Martin!

A question... the two circular marks on the first two images... Are they a processing artifact, or an actual feature?

I'm referring to the marks at around 7 o'clock and 8 o'clock, if we were to see the whole disc.




  
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MalVeauX
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Apr 11, 2018 16:10 |  #3

andicus wrote in post #18604813 (external link)
Beautiful images again, Martin!

A question... the two circular marks on the first two images... Are they a processing artifact, or an actual feature?

I'm referring to the marks at around 7 o'clock and 8 o'clock, if we were to see the whole disc.

They're just dust motes I missed due to poor flat calibration.

Very best,

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monty28428
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Apr 12, 2018 05:48 |  #4

Just awesome as usual -- I could never get tired of these :-)




  
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Davenn
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Apr 16, 2018 05:31 |  #5

great shots, Marty
really nice fine detail in the proms

thanks for sharing :-)


Dave

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Canon 5D3, 6D, 700D, a bunch of lenses and other bits, ohhh and some Pentax stuff ;)

  
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Solar prominences in Hydrogen Alpha, April 11th 2018
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