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Questions tagged [analemma]

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4 votes
2 answers
312 views

What does the solar analemma on earth look like at the equator? Some web sources seem to indicate it is a horizontal line. How can that be?

I'm finding several sources on the internet which say that the solar analemma at the equator is a horizontal line, but this makes no sense to me, especially the analemma at noon, for which the sun ...
Still curious at 82's user avatar
5 votes
2 answers
369 views

Elevation difference of analemmas' taken at different hours and the reason for the tendency of analemmas' being slanted with deviation from the noon

According to Wikipedia, in astronomy, an analemma (/ˌænəˈlɛmə/; from Ancient Greek ἀνάλημμα (analēmma) 'support') is a diagram showing the position of the Sun in the sky as seen from a fixed location ...
Jacob Miller's user avatar
9 votes
3 answers
884 views

analemma for a specified lat/long at a specific time of day?

I have in mind to do a yearlong photo project of the solar analemma. Can someone suggest a software program that will provide (& chart) the altitude and azimuth of the sun, for a given location, ...
Bruce Simonson's user avatar
6 votes
1 answer
713 views

What is the significance of the intersection in the analemma?

Is there an orbital significance to where the analemma intersects? Where in the earth's orbit does the intersection occur? I know the general dates when this happens but would like to know if it ...
Michael Hong's user avatar
1 vote
1 answer
340 views

What is the relationship between the shape of the analemma and the sun's azimuth at sunset at a given latitude?

I want to know how the sun's azimuth at sunset changes over the course of a year. At first, I thought it would have purely sinusoidal motion, hitting its maxima and minima at the solstices, and ...
Greg's user avatar
  • 13
4 votes
1 answer
248 views

Path of sun in the sky on a planet with no axial tilt

Some sources online (e.g. this, see section "Effect of Earth’s Eccentricity") claim that if the earth's axis was not tilted, then the analemma would have the shape of an ellipse/oval. I ...
UndefinedBehavior's user avatar
17 votes
1 answer
3k views

Why does the solar analemma have a strange shape on Jupiter?

I'm trying to look at what the solar analemma looks like from different planets, using Stellarium. To plot the analemma, I go into the ephemeris tab of the astronomical calculations window. From there,...
usernumber's user avatar
  • 17.5k