Back Saros Afrikaans دورة ساروس Arabic Сарас Byelorussian Saros (astronomia) Catalan Saros Czech Saroscyklus Danish Saroszyklus German Σάρος (αστρονομία) Greek Saro-ciklo Esperanto Saros Spanish
The saros (/ˈsɛərɒs/ ⓘ) is a period of exactly 223 synodic months, [a] 18 years 11 days and 8 hours,[2][1] that can be used to predict eclipses of the Sun and Moon. One saros period after an eclipse, the Sun, Earth, and Moon return to approximately the same relative geometry, a near straight line, and a nearly identical eclipse will occur, in what is referred to as an eclipse cycle. Every eclipse has an associated saros series and all succeeding or preceding eclipses have a different saros series associated with them - as the eclipse of the same series occurs or occurred with a gap of one saros only. Solar and lunar eclipses have different saros series.
A series of eclipses that are separated by one saros is called a saros series. It corresponds to:
- 6,585.321347 solar days
- 18.029 years
- 223 synodic months
- 241.999 draconic months
- 18.999 eclipse years (38 eclipse seasons of 173.31 days)
- 238.992 anomalistic months
- 241.029 sidereal months
The 19 eclipse years means that if there is a solar eclipse (or lunar eclipse), then after one saros a new moon will take place at the same node of the orbit of the Moon, and under these circumstances another solar eclipse can occur.
- ^ a b Michael S. Kirk. "Eclipses and the Saros". eclipse.gsfc.nasa.gov. Heliophysics Science Division, Code 670 NASA Goddard Space Flight Center Greenbelt, MD 20771, USA.
- ^ Aveni, Anthony (25 April 2017). "5. Babylonian Decryptions". In the Shadow of the Moon The Science, Magic, and Mystery of Solar Eclipses. Yale University Press. ISBN 9780300227574.
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