I ended up taking a continuous video of the Oct 14 eclipse from about 4 minutes before C2 to about 4 minutes after C3, allowing me to pretty well monitor the progression of Bailey's beads both before and after annularity. From this video I was able to extract an approximate lunar limb profile for the parts of the limb close to the points of C2 and C3. The result for C2 is shown below. There are 17 limb images covering a duration of 48 seconds. Moving inwards, the images were successively shrunk in Photoshop, allowing me to do a concentric nesting of the 17 layers. Each of the images is a stack of 30 frames obtained from AS3! It may be possible to get sharper features by doing a smaller stack, but I'm not really sure I want to start over!
The actual limb profile is shown in the innermost layer. It was obtained using a very cool interactive calculator on the website of Xavier Jubier. The correlation is actually pretty decent. Now I guess I will have to do C3 as well!
Lunt 100 THa
Player One Saturn M camera operating at 19 fps.
Kevin
