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Analemma

Astronomy AmplitudeAnanke

Analemma (pronounced anna-lemma) is a term in astronomy used to describe the plot of the positions of the Sun on the celestial sphere at the same time of day (at approximately 24 hour intervals) and from the same location on Earth on successive ...

 


analemma
A stretched figure-eight curve obtained if solar declination is plotted against the equation of time throughout a whole year.

Analemma
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Analemma
A figure 8-shaped plot of the apparent relative to the mean . This curve is sometimes seen on globes and maps.
References ...

The analemma is a very cool figure eight shape which describes how sundial time varies with clock time, sometimes it is shown between the tropics on a globe.

Analemma Generator
Interactive Tool for Generating Analemmas
Al Guzman has created a spreadsheet which will generate a table of intermediate calculations and a completed analemma in graphical form based on three input values.

analemmatic ~: (pron. ana-lem-mat-ic) a dial consisting of hour points, (rather than lines) laid round an ellipse, and a movable gnomon perpendicular to the dial plane. It may be on any plane, but the most usual form is horizontal.

Analemma The lemniscate-shaped form that results from plotting the position of the Sun at the same time every day.
Anomaly The angle at the Sun between a planet and its perihelion.

Analemma
In astronomy, an analemma (from Greek "pedestal of a sundial") is a curve representing the angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body relative ...

ANALEMMA
The analemma is a figure-8-shaped diagram that shows the declination of the sun (the angle that the sun is from the equator), for each day in the year.

Naturally, the Analemma is important if you want to read a Sundial, so the following site has a nice description of these things too.

He devised new geometrical proofs and theorems; and, in a book entitled Analemma (Greek Peri analemmatos; Latin De analemmate), ...

The shape described by the Sun's position, considered at the same time each day for a complete year, is called the analemma and resembles a figure 8 aligned along a north/south axis.

Questions from Users: What is the Analemma?
*** The equation of time
*** The "Sundial Bridge" in Redding
*** Latest Sunrise, Earliest Sunset ...

(More about the ecliptic, equinoxes and solstices further on.) As an added bonus, other features may be present, such as the analemma, and-I had to look this one up-the equinoctial colure.

See also: Year, Time, Earth, Sun, Solar