Date: 9/4/2011 – 21H45 – 20 minute elapsed.
Coronado Solar Max II 90 mm and Imaging Source camera DMK 41AU02.as
This is a sequence of about 5,000 frames taken in 20min and combined into this short MPEG video. This prominence was extremely active, with changes happening visually in question of minutes.
Below is Sunspot group 1287, taken at 19H36min UTC
Next are the groups 1286, and 1277 taken at 20h57min UTC
Last, sunspot group 1283 taken at 20H49min UTC. The Sunspot group was close to the center of the sun .
Astrophotography in Urban Environment 