It would still be a wonderful affirmation of the Earth's variable orbital speed first suggested by Kepler, I mean the surface rotation in response to the orbital motion of a planet.

Using the circle of illumination or lack of a visible one, Uranus provides an ideal affirmation as the planet turns parallel to the orbital plane at an average of 4 degrees per Earth year and making a full 360 degrees in 84 years. Its distance is so far from Earth that perspective changes owing to the Earth's orbital motion do not affect observations nor conclusions -

http://www.daviddarling.info/encyclo...nus_rings.html

https://www.youtube.com/watch?v=612gSZsplpE

For so many people siphoning a living from hyping Kepler, it must be humbling to have this new facet explained in general and in detail.