Tuesday, May 10, 2022

Observing the Photosphere and Solar imaging settings



Only recently I made progress in imaging the details of sunspots. This was achieved through :
    - imaging with a monochrome camera
    - imaging of the sun in the early morning to be ahead of turbulence
    - use of seeing monitor from SharpCap and applying threshhold
    - exposure time below 10ms
    - format imaging SER 16 bit
    - stacking limited to 5% best images
    - editing using IMPPG software

So, what can we see of the photoshere with a 200mm telescope :
    -  limb darkening
    -  sunspots 
    - (micro)pores
    - light bridges
    - granulation
    - faculae
    - umbral dots and dark nucleus
    - penumbral fibrils or filaments
    - penumbral grains
    - intergranular bright points

Using my image from april 23 with sunspot AR2993/94 I can identify many of the above mentioned solar features.