The Sun on May 16, 2007
Region 10956 is about midway between the east limb (left) and center of the disk. It had a series of B-class, and a couple C-class flares earlier today. NOAA has changed the magnetic classification to beta-gamma-delta, the most dangerous type. M-class flares are expected. Also it has grown by 69% in the last 24 hours. See http://www.raben.com/maps/EarthSideSolarRegions.html for a table showing changes.
Image acquired at 11:50 am MDT with SolarScope LTD 50mm halpha telescope, Televue 2.5X Powermate, and Canon Xti (1/500 sec at ISO 100 for disk, 1/400 sec at ISO 800 for prominences). Aligned and stacked with Registax4, composited and enhanced with Photoshop. Sky was mostly clear, thin haze, temperate 70°F, no wind, and 5/10 turbulence, location Louisville, CO.
Image of the sun in white light at 1:00 pm MDT with Stellarvue A1010 telescope, Baader filter, and Canon Xti camera (ISO 100, 1/400 sec exposure). Aligned and stacked with Registax4.