Sun in Ha - a large prominence
Date: May 8, 2010 2:10pm PDT
Location: Victoria, BC, Canada
There were multiple solar prominences visible on the Sun this afternoon. This was the most spectacular, and featured a little hole in the prominence near the Sun's surface - visible through the eyepiece as well as in this photo. The solar disk also displayed a large plague, however it is not visible in this cropped image.
Exposure: 1/15 second at ISO 800
Bandpass: <0.55 A
Equipment: Canon 7D dSLR a-focal through a 2.5x Powermate & Lunt LS60THa + LS50FHa solar telescope mounted on an HEQ5 tracking mount.
Processing: ACDSee Pro 3 - Sobel edge detection; aggressive contrast stretch, crop.