How to see the harvest supermoon eclipse

Moon gazers will get an extra treat when a partial lunar eclipse shaves a sliver off the top of the full supermoon Tuesday night.

State of play: September's full Moon, which is called the Harvest Moon because it allowed farmers more light to gather crops before first frost, is the second of four supermoons this year, according to NASA .

• A supermoon occurs when the Moon is near its closest point, or perigee, to Earth in its orbit.
• It can look brighter than an average Moon and appear around 14% larger than when it's farthest from Earth, per NASA .

Plus: The eclipse can best be seen when the Moon starts entering the Earth's full shadow at 7:13pm Pacific time, per NASA.

• It will peak at 7:44pm, when the top 8% of the Moon will be dark, per NASA.

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