in Hydrogen-Alpha or a comparison of both wavelengths. Date: March 8, 2007 1520UT Location: Rockville, Maryland USA Rotation: 2054 Filter: Coronado SolarMax 70 Calcium K Camera: Lumenera SKYnyx 2-2 Exposure: 15 fps Processing: LuCam, RegiStax 4, Adobe PhotoShop CS2
in Hydrogen-Alpha or a comparison of both wavelengths.