While this will be smaller than the one on Tuesday, it will be "significantly larger" than the smallest full moon of the year, said the spokesman. The average distance between Earth and the Moon is 238,855 miles.
Since it's closer to the Earth's surface, it appears huge and, therefore, brighter because less light is being scattered.
The point of true perigee is only six hours away from perfectly coinciding with the fullest version of the moon, meaning it appears up to 14% larger and 30% brighter than normal.
These points are called apogee and perigee.
During the phenomenon, the effects of the moon's gravitational pull on the Earth's oceans are more pronounced. However, this event usually has lesser attention because this kind of moon is invisible from Earth.
The term supermoon was first coined by Richard Nolle in 1979 for the longer technical term "Perigee-Syzygy of the Earth-Moon-Sun system", which became popular both among the astronomers and common people. In January, we had an eclipse during a super blood wolf moon; the third super moon will come up in March.
This Tuesday night will bring the "super snow moon". Although the moon will be "super" on the 19th, it will still look pretty full (and super!) to the casual observer the night before and after.
A full moon on Tuesday, February 19 - also called the "snow moon" - will be the brightest of 2019.
While a supermoon's brightness is dependent on Singapore's weather conditions, it will look slightly larger when compared with full moons in other months or with objects on the ground nearby, said the Science Centre spokesman.
Those living north of Scotland in Shetland and Orkney are also expected to have good views of the supermoon but they also have to watch out for thickening cloud. For London that was 5.22pm GMT, New York will see the moon at 5.46pm ET and Australia will see the spectacle at 7.39pm in Sydney (local time) and 8.11pm in Melbourne.
The snow moon happens to be the full moon in the month of February, which is named after the ground snow.
The supermoon has also been seen rising over Turkey's capital, Ankara.