“The farthest point in this ellipse is called the apogee, and is about 405,500 kilometres from Earth on average. Its closest point is the perigee, which is an average distance of about 363,300 kilometres from Earth.”
The Moon reaches its points of perigee and apogee during each of its 27-day-long orbits of our home planet.
But the term Supermoon specifically references the moment this happens during a Full Moon.
Mr Tavernier said: “Because supermoon is not an official astronomical term, there is no definition about just how close to perigee the Full Moon has to be in order to be called ‘super’.
“Generally, Supermoon is used to refer to a Full Moon 90 percent or closer to perigee.”