As of March 2018, Photo Ephemeris Web shows the "six-degree shadow circle" as you adjust the timeline.
This short video explains:
What is the 'Six-degree shadow circle'? from Crookneck Apps on Vimeo.
Next up: Using Photo Ephemeris Web, Part 7: 3D Celestial Sphere
Good explanation and GREAT web app, thanks!
All 7 tutorials were great. Thanks.
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