The full moon over Arizona tonight is the smallest of the year.
This is not because the moon changes size physically, instead the appearance of a smaller moon is because the orbit around the Earth is not perfectly circular.
Tonight's full moon nearly coincides 'apogee', which is the farthest point at which the moon circles the Earth.
The image below is from NASA explaining the track of the moon.
The increased distance from the Earth to the moon will make the moon appear around 4% smaller than the average moon and 12% smaller than the closest full moon of the year in August.
Below is an image from NASA of the moon at apogee compared to perigee in 2006.
Apogee occurs nearly 3 hours before the full moon at 9:53 PM.
Moonrise in Tucson this evening is at 5:39 PM, which is just before sunset.
Moonset tomorrow morning is at 7:26 AM.
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