# Which celestial body's length of day is closest to that of Earth?

I know the planets Mars and Eris are among bodies that have the most Earth-like mean solar days (about 24.67 and 25.9 hrs). Among moons there is Mimas of Saturn which has one of the most Earth-like days. Uranus and Neptune also have more Earth-like day lengths than many other known planets or moons. However I don't know of a body in the Earth's planetary system that would have a more Earth-like solar day than Mars (other than the Earth of course). Do you know a planet, moon or asteroid that has a daylength closer to that of Earth than Mars' is?

• Hi @DeanPitts +1 and Welcome to Stack Exchange! Can you cite a source or add a link or at least explain why you think this is 1) true and 2) the answer to the question? (i.e. " closest to that of Earth") Thanks! – uhoh Feb 23 '20 at 3:07