plural analemmas
Definition of analemma
: a plot or graph in the shape of a figure eight that shows the position of the sun in the sky at a given time of day (such as noon) at one specific locale measured throughout the year
Affix a camera to a sturdy mount … and take a photo of the Sun at a particular time of day. Sounds simple enough. Do this regularly throughout a calendar year and you'll end up with a picture of the analemma, the Sun's apparent path in our sky throughout the year. — Astronomy
also
: a scale (as on a globe or sundial) based on such a plot that shows the sun's position for each day of the year or that allows local mean time to be determined
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Merriam-Webster unabridged
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Time Traveler for analemma
The first known use of analemma was in 1969
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