At its closest, it looks 14 percent larger and 30 percent brighter than it does at its farthest.
According to www.nasa.gov, "A supermoon is a moon that is full when it is also at or near its closest point in its orbit around Earth". Supermoons typically appear about 30 percent brighter than the usual moon.
In December, the moon will be closest to the Earth on December 4 at 2.15 pm (IST), when it will be 3,57, 492 km away from Earth.
There will be one on New Year's Day followed by another on January 31, which, according to NASA, will be a "super blue blood moon".
Each month the moon rotates around the earth in an ellipse rather than a flawless circle.
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However, due to an optical illusion the moon can sometimes appear even bigger and if last year's is anything to go by, viewers will be in for a visual treat. Hence, for those in the Northern hemisphere, it is a cold supermoon. Technically, in the night from Sunday to Monday we will rate for the fourth Supermoon of the year - the only one that can see with their own eyes.
But the astronomer warned that as use of the nickname "supermoon" grows, so do expectations.
This weekend will be a good time to relax, look up at the sky and take in the glowing moon. If you want to celebrate the year's most super supermoon as a holiday for moongazers, I don't see anything wrong with that. It appears the biggest and brightest during this time because of a "moon illusion" effect, which is created when you're able to compare the moon to other objects for scale.
Just to be clear, the supermoon is only the moon-there will be no eclipse and no colors.
The supermoon which was last seen on November 14, 2016 is set to re-appear tomorrow evening on December 3. "But it's another great chance to watch the Moon".