A planet at superior conjunction lies along the same line as the Earth and the Sun, but on the opposite side of the Sun from the Earth.

A superior conjunction occurs when a Solar System body, such as a planet, asteroid or comet, lies along a straight line joining the Earth and the Sun, but is on the opposite side of the Sun from the Earth. The elongation of a Solar System body at superior conjunction is zero degrees.

A Solar System object at superior conjunction will have the same right ascension on the celestial sphere as the Sun.