DiCicco still works at Sky and Telescope magazine, and would probably answer questions about techniques for analemma shots, including the streaking sun at Dec 22nd, June 21st, and dates nearer equinox when the equation of time is at zero (where the figure 8 "crosses itself"), which could have been either mid-April or early September.

You can likely find a way to contact him at the magazine web site:
http://www.skyandtelescope.com/

Lee