British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

Three sunspots at once - just like buses!


Expand image

About this observation
Peter Tickner
Time of observation
24/11/2020 - 11:22
Sunspots AR2783, AR 2785, AR 2786
Observing location
Urban Berkshire
ZWO ASI 174MM mono CMOS camera
80mm f/6 triplet APO refractor
Lunt Herschel wedge
EQ6 Mount

This is the first time I've ever used a Herschel wedge to image the Sun and I'm happy to find that the modern ones have better ways of processing the spare heat generated than the open ones I remember.    I would have preferred to use one of my other cameras as the 174 has an issue with horizontal lines in solar images, but it was the only one set up to work with my videoing software this morning. 

I also had probably the shortest window you could possibly imagine - the Sun only cleared local obstructions for 25minutes today and even then it was through hazy cloud the whole time.  By the time I had sorted out the camera (and after a quick visual look) I had just five minutes to capture some images.


Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.