Here in 2019, 3 supermoons are on the calendar. But, what exactly is a supermoon? Chief Meteorolgist Nicholas Ferreri tells us a full moon occurs when the moon is at or close to its perigree (perigree = its closest position to Earth).
The first supermoon of the year happened January 21, this current one reaches its peak on February 19, and the third 2019 supermoon comes next month on March 21.
Depending on its position in the sky when you go out to view it, a supermoon often appears much bigger and brighter than what is typical. However, there are times throughout the night, when, without another moon to compare it to, the average observer may not see much difference.