The point of the earth's orbit that is nearest to the sun. Although the position is part of a 21,000 year cycle, currently it occurs around January, when the earth is about 3 million miles closer to the sun than at aphelion. This term can be applied to any other celestial body in orbit around the sun. It is the opposite of aphelion.
PERIHELION
Meaning of PERIHELION in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012