Observation by Alun Halsey: Large prominence in Calcium K line

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Alun Halsey


Alun Halsey


2021 Sep 11 - 12:33


2021 Sep 12 - 16:13


The Sun

  • Bresser 90/900 achromat
  • Lunt CaK B1200 module/QHY5III 178M

Berkshire UK

Target name

The Sun


Large prominence in Calcium K line

About this image

Very faint in CaK wavelength and nearly missed it. Two SER files recorded one for prom and second one for the limb. stacked in Registax and using layers in PS CS2 to combine the two images,processed in Astrosurface and back to CS2 to add false colour.

North is towards top right hand corner.

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