Sad news about the remarkable Fred Espenak. Like all eclipse enthusiasts, Photo Ephemeris users have benefitted from his work - his public Besselian elements and eclipse catalogue data provide the foundation for the eclipse calculations included in TPE.
Please read this appreciation by Joe Rao:
I will always recall sitting in a cafe in Alliance, Nebraska with Alice at 6:15 in the morning in August 2017 cramming his concise and expert eclipse photography tips ahead of that day’s events.