Observation by Alun Halsey: Five wavelength SHG animation 21 May 202...

Uploaded by

Alun Halsey

Observer

Alun Halsey

Observed

2023 May 21 - 13:30

Uploaded

2023 May 22 - 13:07

Objects

The Sun

Equipment

Bresser 90mm f/10 achromat + 82mm Hoya Pro ND16 filter
DIY spectroheliograph
QHY5III 178M
CEM60

Location

Reading Berkshire UK

Target name

The Sun

Title

Five wavelength SHG animation 21 May 2023

About this image

Home built SHG using 135mm (collimator) and 150mm (imaging lens) SLR Pentax lenses and 2400l/mm grating (25x25mm) was used to capture scans of the solar disk in Calcium K,Hydrogen beta,Magnesium,Sodium D2 and Hydrogen alpha. Since scope has a focal length of 900mm two scans are needed to capture the whole of the Sun. This gif is only showing the northern hemisphere and the flaring activity around sunspot grouping AR 3313,3311 and 3314 near the north eastern limb. These are single scans (no stacking) and minimal processing (slight noise removal and resizing of images to keep file size down). 16x sidereal speed was used to force the scan.

Files associated with this observation

13_30_22Z_shift=0_clahe.gif (1.2 MB)

Like this image

Jonathon Elliott, Mike Harlow, Callum Potter, Gerard Cauchi, Anton Matthews, Nick Quinn, James Weightman

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