Observation by Nigel Price: Spectroheliograph of Sun in Hydrogen Alp...

Uploaded by

Nigel Price

Observer

Nigel Price

Observed

2025 Jun 23 - 17:30

Uploaded

2025 Jun 23 - 22:10

Objects

The Sun

Equipment

Askar 600MM FRA
ZWO ASI 533MM Pro
AM5N mount
Modded Sol'Ex Spectroheliograph

Exposure

2.6ms, ROI 2600x80, 16x scan rate, 20 scans - best 50% stacked in AS4!

Location

Crantock, Cornwall, UK

Target name

The Sun in Hydrogen Alpha

Title

Spectroheliograph of Sun in Hydrogen Alpha

About this image

My school (Newquay Tretherras School, Cornwall) has a project with the Royal Society (#RoyalSociety Partnership Grants) and Exeter University to image the Sun using a spectroheliograph in order to measure its rotation rate. This image has been taken with the kit acquired for that purpose and is being used with the school's astronomy clubs and students for that purpose and also for outreach - local primary schools.

Anyway - todays improvement in the image was swapping the carbon fibre tripod that comes from ZWO with an HEQ5 Pro tripod. This significantly reduced the resonance that was producing "wobbles" (technical term?) in the resulting image. The quality of the image is significantly improved so that we can see lots of filaments, sunspots and active regions - the sun looks glorious at the moment.

Files associated with this observation

_Sun_Halpha_20250623_1730b.jpg (6.7 MB)

Like this image

Dominic Ford, Nick Quinn, Charles Graham Taylor, Robin Leadbeater, Nick Hewitt, Alun Halsey, Graham Winstanley

Comments

Robin Leadbeater, 2025 Jun 25 - 17:47 UTC

There's an article on Doppler solar rotation measurement using my LHIRES III spectrograph in this months journal which might be of use

Cheers

Robin

Dawson

Nigel Price, 2025 Jun 27 - 21:02 UTC

Thanks, I'll take a look. Nigel

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