-- If a planet spins, then it has a spin axis.
-- If it has a spin axis, then it has poles.
-- An equator is just the line made up of all the points that are midway
between the poles. So if the planet has poles, then it has an equator.
-- Mercury spins.
The circumference of Mercury at equator is 15 329 km.
The circumference at the equator is 15 329 km for the planet Mercury.
Mercury's diameter is about 4875 kilometers, at the equator. The circumference is "pi" x 4875. That's about 15315 kilometers.
Mercury
1.5 macron
At the equator, the surface temperature on Mercury (facing the sun) can reach 700K (430'C).
Yes. Mercury rotates, like all the planets. So it has an axis of rotation and that defines the "poles" of the planet. The equator is defined relative to the planet's poles.
Mercury's Inclination of it's equator to it's orbit is 0 degrees. The answer is Mercury
It's about 2440 kilometers. Mercury is almost spherical, so the radius is about the same everywhere.
4879 km at its equator or 3031 miles long
At the equator, the surface temperature on Mercury (facing the sun) can reach 700K (430'C).
The diameter of Mercury is 4879 km at its equator, or 3,031 miles.