Sun Analemma
Taken by Meiying Lee on December 29, 2021 @
Taipei, Taiwan
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2021 Sun Analemma in Taipei in the Morning and Afternoon.
After more than one hundred pursuits and struggles with the sun and clouds in a year, I finally finished the works of sun analemma in Taipei in the morning and afternoon!
If you record the sun at the same place and time every day, you will find that the psition of the sun keeps changing. One year later, put all the suns in the same photo or make an animation in sequence, and you will see it draw a big figure of 8 in the sky exactly as the laws of physics tell us. This is really very exciting and moving! The trajectory of the sun in a year is called the sun analemma. The link to the video of the sun analemma in Taipei is as follows：https://www.youtube.com/watch?v=59MW1aqO7L4 .
The sun analemma seen on the earth is basically like a figure of eight, and the two circles of the figure-8 are of different sizes. This is related to the eccentricity of the earth's orbit and the tilt of the earth's rotation axis. The degree of the figure-8 tilt in the sky is related to the latitude of the observer's location and the recorded time.
In 2021, I spent a whole year in Taipei recording the position of the sun at 7:30 am and 4:30 pm. In the northern hemisphere, the summer solstice of the sun analemma in the morning is at upper left, and the winter solstice at lower right. As for the sun analemma in the afternoon, the tilt direction is different from that in the morning. The summer solstice is at upper right, and the winter solstice at lower left. Whether it is in the morning or in the afternoon, sun analemma has a small circle above and a large circle below. It is also worth noting that the intersection of the figure-8 did not form at vernal equinox or at autumnal equinox.
The landscape below analemma in the afternoon is the downtown area of Taipei. Note that the tall building in the foreground is Taipei 101 (508 m), which used to be the tallest building in the world from December 1, 2004 to January 7, 2010. The landscape below sun analemma in the morning is the mountains in the southeast of Taipei. In fact, Taipei is a basin surrounded by mountains.
Photographer's website:
https://www.facebook.com/meiying.lee.98/
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