It can be calculated based on the major, minor axis of the ellipse.

Circumference of Ellipse Calculator. He is best known for making the first recorded measurement of the Earth…

Born around 276 B.C. Today we know our planet's circumference is roughly … How to calculate the circumference of the Earth Eratosthenes estimated Earth’s circumference at about 46,250 kilometers (28,735 miles). In calculating the circumference of the earth along this latitude it has to be assumed the earth is perfectly spherical and using the formula C =2πr, where C is the circumference and r the radius. With a little thinking we can easily figure out that, C = π x 4.3m = 13.51m (to 2 decimal places). The distance around the ellipse is known as circumference of an ellipse. Using the knowledge that the diameter is 4.3m on the diagram and knowing that C = πd, we can calculate the circumference. The missing length is 13.51m. The following circumference calculator is easy to use. in Cyrene, Libya, Eratosthenes soon became one of the most famous mathematicians of his time. The calculator below calculates Earth radius at given latitude. We know that, the most of the orbits of the planets are ellipse. Radius is half the diameter, it quantifies the distance from the center to the edge of the celectial body.The planetary radius is important e.g. EDIT: I misapplied my formulae (or misinterpreted the results of my calculations, pick one), and published an incorrect answer, which I shall now fix. Just enter the value of the radius and hit calculate button. Therefore, he knew that on this date and at this point, the Sun was at its zenith. The missing length is the circumference. Calculator for the radiuses of Sun, Moon, Earth and the planets in kilometers, miles and compared to each other. In 200 B.C. He had had previously determined that on June 21, the date of the summer solstice, the Sun cast no shadow at the bottom of a water well located in Cyrene (also spelled "Gyrene"). for the calculation of the gravitational acceleration.. Radius: equatorial polar average In fact, of course, it calculates the radius of WGS 84 reference ellipsoid at given latitude, and if you want some theory recap, you can find it below the calculator. To calculate the circumference of the Earth, Eratosthenes measured the angle of the shadow to the Earth.