No planet has a truly circular orbit around the Sun.
Mars’s orbit is particularly elongated, which affects the planet’s seasons.
Mars takes 788 Earth days to orbit the Sun.
At its farthest (aphelion), it is about 155 million miles (250 million km) from the Sun.
At its closest (perihelion), Mars is some 130 million miles (210 million km) from the Sun.
Mars’s orbit approximates a circle that has been elongated by 20 percent.
Earth’s orbit is only stretched 3 percent away from being a true circle.