Solar Activity, 2004.08.17


2004.08.17 UT 18:24 - Sunspot groups. 1/320 sec exposure, Canon 300D, 90mm Maksutov (f/5.6, FL = 500mm).

2004.08.17 UT 17:44 - Sunspot group 656. 1/400 sec exposure, Canon 300D, 300mm SCT stopped down to 100mm (f/30, FL = 3000mm). This group is just rotating off the limb.

2004.08.17 UT 18:21 - Sunspot group 661. 1/400 sec exposure, Canon 300D, 300mm SCT stopped down to 100mm (f/30, FL = 3000mm).
©2004 Chris L Peterson