Supermoon 2018: First of two full supermoons in January is tonight

The first day of 2018 will feature the biggest full moon of the year — a supermoon. It will also be one of two full supermoons in January alone.

What is a supermoon?

A supermoon is a new or full moon that reaches its fullest point near the time of perigee — or when it is at its closest point to Earth in its monthly orbit.

This moon, according to the astronomers at, will be the closest full moon of 2018. Therefore it may appear bigger and even brighter in the night sky.

And tonight will be the best chance to see it.

The moon is expected to reach its fullest point tonight, Monday, Jan. 1, at 10:24 p.m.  However, it will appear full all night long from when it rises near sunset to when it sets near sunrise.

Find your moonrise and moonset times for your location here. According to EarthSky tonight’s supermoon will also be the closest perigee of the year.

It’s the second of three supermoons in a row. The first was on Dec. 3, and the next will come on Jan. 31.

That will mean January will have not one but two full moons. The second full moon in a calendar month is sometimes called a blue moon.

There will also be a total eclipse of the moon then, making the Jan. 31 moon a super blue moon eclipse.

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