analemma
Sign in to savethumb|Afternoon analemma photo taken in 1998–99 in Murray Hill, New Jersey|Murray Hill, [[New Jersey, U.S., by Jack Fishburn. The Bell Laboratories building is in the foreground.]]
Article
17 sectionsContents
- Description
- History
- As seen from Earth
- Photography
- Calculated analemmas
- Estimating sunrise and sunset data
- Earliest and latest sunrise and sunset
- Times of sunrise and sunset
- Azimuths of sunrise and sunset
- Seen from other planets
- Of geosynchronous satellites
- Of quasi-satellites
- See also
- Notes
- References
- Further reading
- External links
thumb|Afternoon analemma photo taken in 1998–99 in Murray Hill, New Jersey|Murray Hill, [[New Jersey, U.S., by Jack Fishburn. The Bell Laboratories building is in the foreground.]]
In astronomy, an analemma (; ) is a diagram showing the position of the Sun in the sky as seen from a fixed location on Earth at the same mean solar time over the course of a year. The change of position is a result of the shifting of the angle in the sky of the path that the Sun takes in respect to the stars (the ecliptic). The diagram resembles a figure eight. Globes of the Earth often display an analemma as a two-dimensional figure of equation of time ("sun fast") vs. declination of the Sun.