Sunspots and prominences on the Sun in Ha
Date/Time: July 13, 2012 2:55PM PDT
Location: My home, Victoria, BC, Canada
There were several dozen small prominences visible scattered around the Sun's perimeter, and some were spewing plasma into space, however the highlight was the huge sunspot complex AR1520 on the Sun's surface (left of centre in this photo). This sunspot has a delta-class magnetic field which generated an X-class CME towards Earth. Another significant sunspot is 1521 to the right of 1520, which also shows lots of detail.
Equipment: Hutech-modified Canon T2i dSLR a-focal through a 2.5x Powermate, IDAS VLC filter, & Lunt LS60THa + LS50FHa solar telescope mounted on an HEQ5 tracking mount.
Processing:
Adobe Photoshop Elements 10 - Crop, reduce colour depth to 8 bit, apply Sobel method edge detection.
Adobe Lightroom 4 - adjust brightness, annotate