Sun in Ha - a large, detatched prominence
Date: June 18, 2010 3:44pm PDT
Location: Victoria, BC, Canada
What originally caught my attention this afternoon when I looked through the eyepiece was a large, mountain-shaped prominence with another smaller prominence under it and another large prominence which reminded me of a haystack. This spectacular prominence eluded me while observing through the eyepiece since was completely separated from the solar surface. It was only revealed to me when I processed my images. This image is processed using a Sobel method of edge detection, which results in a false colour image.
Exposure: 1/8 second at ISO 800
Bandpass: <0.55 A
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: ACDSee Pro 3 - Sobel edge detection; modest contrast stretch, crop.