Observation by John Hughes: Sol in Ha 14 May 2019 - AR2741 plus prom...

Uploaded by

Mr John William Hughes

Observer

John Hughes

Observed

2019 May 14 - 09:45

Uploaded

2019 May 15 - 10:38

Objects

The Sun

Equipment

William Optics Z61
Daystar Quark Chromosphere Ha filter
ZWO ASI174MM camera
SharpCap image capturing software
Photoshop

Exposure

10ms exposure; Gain 40 on surface image and Gain 200 on prominence

Location

North Essex

Target name

Sun

Title

Sol in Ha 14 May 2019 - AR2741 plus prominence

About this image

Attached is an image of the Sun taken in Ha on 14 May 2019.

The final output is comprised of two images, one capturing the surface detail and the second the prominence. Both were taken with my William Optics Z61, Daystar Quark Chromosphere, ZWO ASI174mm and captured using SharpCap.

Surface image - Exposure time 10ms, Gain 40. 3,000 framed AVI.

Prominence image - Exposure time 10ms, Gain c290 (memory bad!). 3,000 frames AVI.

SharpCap settings then restored to the surface image setting. Telescope was then centred on the Sun and defocussed. Further 3,000 frames of an AVI were taken to create a stacked flat frame.

All three AVIs were stacked in AutoStakkert2 with the surface and prom image calibrated with the stacked flat frames. Best 60% taken.

Levels adjustments undertaken in Photoshop along with high pass sharpening. Two images brought together as separate layers and combined in difference mode then inverted. Some contrast adjustments made to surface image to help reveal more detail.

Many thanks.

John

Files associated with this observation

Sol_140519_Ha_Prom_Neg.jpg (372.1 kB)

Like this image

James Screech, Graham Winstanley, Jeremy Shears, Andy Wilson, Andrew Dumbleton

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