Fame at Last

 Solar HA  Comments Off on Fame at Last
Apr 012024

I was really honoured to be featured on the front page of spaceweather .com recently. Click here to see the animation.

Click image to visit article on SpaceWeather.com
 Posted by at 1:52 pm

2023 Prominence Compilation

 Solar HA  Comments Off on 2023 Prominence Compilation
Oct 292023

Above is a compilation of the solar prominence animations I captured in 2023 from Inverness, Scotland. Full details of equipment and software used are in the end credits.

 Posted by at 1:08 pm

Frisky Prominence

 Solar HA  Comments Off on Frisky Prominence
Sep 272023

This was a short capture of a prominence that was very animated considering it only lasted 25 minutes.

Click on image for full size version.

Captured with my 90mm PST mod, 2.5x barlow and DMK21 camera.

More of my animations are here.

 Posted by at 12:03 pm

Dave’s Video Cleaner (DVC)

 Solar HA  Comments Off on Dave’s Video Cleaner (DVC)
Aug 062022

Here is a preview of my latest app DVC which is used to clean up astro videos.

I capture hundreds of videos using DSSR over several hours to create my solar animations. These are then batch processed by Registax or Avistack. However, any dark frames caused by clouds can cause glitches or even shutdowns for the stackers. DVC works by first analysing the brightness of every frame in every video. Any videos with frames that are too dark are moved into a folder called “2Bcleaned”.

DVC then processes the videos requiring cleaning and creates a copy video with the darker frames removed. These can then be included with the ‘clean’ videos and batch processed by stacking software with no problems.

 Posted by at 1:55 pm

8 Hour Solar Rotation

 Solar HA  Comments Off on 8 Hour Solar Rotation
Jun 272022

This animation shows 8 hours of solar activity caught with my Coronado PST on June 23rd, 2022. Software used was DFM, DSSR, Avistack, Gimp, Advanced Renamer and DVS. It repeats in reverse so you can see the Sun’s rotation.

I also managed to catch a jet passing the Sun which is below at half speed.

 Posted by at 5:58 pm

Solar Animation Compilation

 Solar HA  Comments Off on Solar Animation Compilation
Aug 212020

This is a compilation of my solar animations made between 2012 and 2020. Most were made with a Coronado personal solar scope and DMK21 camera. Watch out for the Mercury 2016 transit at the end.

 Posted by at 12:01 pm

Sunspot AR2738 13th April 2019 Timelapse

 Solar HA, Uncategorized  Comments Off on Sunspot AR2738 13th April 2019 Timelapse
Apr 152019

This was taken with my Coronado PST solar scope from Inverness, Scotland over 8 hours of sunshine. It repeats a couple of times at different speeds so you can watch the action.

 Posted by at 6:19 pm

Mercury Transit 2016

 Planets, Solar HA  Comments Off on Mercury Transit 2016
May 122016

I was very lucky during the transit because an early morning haar burned off just before the transit and we had mostly clear blue skies above Inverness, Scotland for the rest of the day. This let me capture most of the transit until the Sun sunk below my roofline. Here is the animation I produced from the results (some jerkiness is caused by occasional clouds).

You can see the transit near the end of this compilation video.

Equipment and Software Used

  • Coronado PST solar scope
  • HEQ5 Pro mount
  • PowerMate 2.5x barlow
  • TIS DMK21 camera
  • EQMOD for mount control
  • DSSR for autoguiding and video capture
  • AviStack for video stacking
  • DVS for animation
  • Pipo X7 PC for mount control, video stacking and animation


I had intended to use my PST at prime focus to capture the transit but I changed my mind just after the start and zoomed in with my barlow. Mercury made a perfect autoguide target for DSSR and I only had to guide manually when a telephone cable went in front of the Sun. DSSR automatically recorded 669 consecutive videos, each 30 seconds long which were batch stacked and processed in AviStack.

I used DVS to stabilise and animate the AviStack images and add the clock, text and scale Earth. The scale Earth threw me for a while because Mercury is only 38% the size of the Earth and it looked far too big when I added my standard scale Earth. It took me a while to realise that Mercury and the Sun are at different distances from Inverness so I added 2 scale Earths.

I love pushing the limits of low cost astro equipment so I am delighted that my £70 Pipo X7 PC was able to act as my observatory workhorse.

 Posted by at 12:22 pm

DSSR5 Scan Stacking Challenge

 Solar HA, Tutorials  Comments Off on DSSR5 Scan Stacking Challenge
Jul 082015

I have been working with Sylvain Weiller to implement his drift method of video capture into DSSR5 beta. This method moves your scope around a target feature while recording video. Stacking apps can integrate this video to produce an image of the whole scanned area. This effectively quadruples the area of your imaging sensor and also removes the dreaded Newton’s rings.

DSSR5 allows you to scan along single axes (right ascension or declination) or dual axes with the option of backlash take up. The dual axes mode moves around a rectangle 1>2>3>4>1 with a sawtooth edge profile (to eliminate stacking artefacts) like so:

Dual Axes Scan Path

Dual Axes Scan Path

We are still working out the best processing workflow to handle these scans so I have uploaded a full disk and detail scan (zipped AVI in Y800 codec) so others can experiment. Please let me know thru my user group or other groups I posted this link to on how you get on and what worked for you. The files are here:

Full disk scan (1.57Gb)

Detail scan (1.37Gb)

Sylvain managed to process these files in Registax 5 before he went on holiday and his results are below. Notice the extra imaging area compared with the normal 1/4″ ccd field of view and the total absence of the Newton’s rings which were very obvious in the detail video.

Click for full size image.

Click for full size image.

sylvain detail

Update July 13th

I had a go myself using AviStack and here are my uncropped results. Very close to a good result but I need to close up the missing pixels.

flare dualavs

Click for full size image

Andrew Cool of SkippySky noticed an interesting result from the AviStack processing results. The Frame Shift graph actually captures the scanning path with sawteeth very well. It also reveals that my mount needs to be more accurately aligned because the red and blue lines should end on zero.

disk dual_as2_diagaligns

 Posted by at 12:40 pm