It must be near circular orbit obeying certain laws of celestial body rotation.
All of the planets in our solar system have an elliptical orbit around the sun.
Ellipses
Mars, and all the other planets, have oval-shaped, or eliptical, orbits.
The planets orbit the Sun in near-perfect circles, but they are actually ellipses. This is because that although the Sun contains much more mass than the planets in our solar system, the planets pull the Sun slightly, which by definition creates an elliptical orbit.
Like the other planets, Uranus has an elliptical orbit as it moves around the sun rather than a circular orbit. Uranus has an axial tilt of 99 degrees, which is a lot, considering the axial tilt of the Earth is 23.5 degrees.
Planets follow an eclipse shape when orbiting around the sun. Pluto had an irregular orbit and is no refereed to as a moon.
All of the planets in our solar system have an elliptical orbit around the sun.
Planets orbit the sun in the shape of an ellipse, which is an elongated circle similar to an oval. When it was first discovered that the Sun is the center of the solar system, it was thought that all the planets had a circular orbit, but the calculations didn't fit.
Elliptical Orbit
All the planets in the solar system are kept in orbit by the gravitational pull of the sun. The effect of the other planets and other bodies in the solar system is to change the shape of the orbits slightly but the sun is what keeps them in orbit around the sun.
An orbit around the Sun and a nearly spherical shape. See related question.
An ellipse.
Ellipse.
Planets orbit in an ellipse.
Ellipses
The planets orbit the sun in an ellipse, like a squashed circle. The amount by which the ellipse is deformed by, from being a circle, is referred to as the eccentricity. An object with a highly eccentric orbit, such as a comet, will have a very elongated and stretched out orbit, its distance from the sun throughout its orbit will vary by a lot.
Mars, and all the other planets, have oval-shaped, or eliptical, orbits.