Tuesday, January 12, 2010
Active Region 11040
AR 11040 has become quite dynamic, and now includes at least 10 spots. While the Hydrogen alpha wavelength does not show spot detail as well as white light filters, de-tuning the etalon reveals these spots clearly. There are a few filaments visible, and during the time the sketch was being completed, the small "eyelash" shaped filament south of the AR developed in under 5 minutes. The magnetic field lines surrounding the AR were easily observed and extended some distance from the bright parts of the region. Finally, there were some small, but quite bright and complex prominences.