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Full Supermoon of January 20, 2019
Pre-Lunar Eclipse

Largest Full Moon (Supermoon) of 2019 Photo - Airplanes & RocketsJanuary's first full moon, known as the Wolf Moon, is the biggest and brightest full moon of 2019 - a 'supermoon' in modern parlance. It was also a long duration (1 hour and 2 minutes) total lunar eclipse. The technical name for this special combination is the perigee-syzygy of the Earth-Moon-Sun system. The moon reached fullness at 00:16 EST and perigee at 14:59 EST on the 21st. The moon is full when the earth is between the sun and the moon, and the moon is new when it is between the sun and Earth.

The picture below was taken out of my back door, at around 9:30 pm local time (Erie, PA), at the beginning of the penumbral phase of the eclipse (not apparent in the photo). The outside temperature was about 5 °F and the wind was howling pretty good - quite appropriate for this Wolf Moon!

Because of widespread cloud cover, I had to wait a while to get an unobstructed shot of the moon. By the time the total phase began at 11:41 pm, the sky was completely overcast. I dread the statistical likelihood of overcast skies when on April 8, 2024, the path of totality for North America's next total solar eclipse of runs right through my yard.

An off-the-shelf Nikon D3300 camera with an 18 mm lens was used on the Auto setting resulting in a 1/4-second exposure at F3.5, ISO6400. The photo was sharpened a little, but the color, brightness, and contrast are un-retouched. I was surprised at how it turned out.

On average, the moon is 238,855 miles (384,400 km) from Earth. Its orbit around the earth causes it to go through all its phases once every 29.5 days. Since the orbit is elliptical with the earth in one of the foci, one side of the orbit is 31,070 miles (50,000 km) closer than the other. So in each orbit, the moon reaches this closest point to us, called perigee (apogee is the farthest point). Occasionally perigee coincides with a full moon, as it did on this night, making the moon bigger (up to 14%) and brighter than any other full moons of the year.

Note: When is it proper to capitalize 'Earth?" Only when the word is used as a proper noun; i.e, a name. For example, you would write "The moon orbits the earth," but "The moon orbits Earth."

 

 

Posted January 20, 2019

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Kirt Blattenberger, Webmaster - Airplanes and Rockets
Kirt Blattenberger
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Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD ...
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