The sun imaged in the near ultra-violet... specifically, a spectral band 2.2 angstroms wide, centered at 393.37nm. The edge prominences are visible in this wavelength too, but more defined in the deep red wavelength of hydrogen alpha, which has been added to this solar composite.

Some additional recent images with the Coronado CaK telescope can be seen here.

May 31, 2013/ captured with 90mm Coronado CaK telescope used courtesy Dennis Zywiczynski, and Little Big Man, PGR Grasshopper Express 6 megapixel camera

© Alan Friedman | all rights reserved