Construct · 1 fields · 2 citations

saros: a standalone construct

One name. One construct. A landmark on the map.

● anchor · one construct: the eclipse cycle Nearest construct by meaning·not indexed
saros1 CONSTRUCTSarosBRACK-BERNSEN · SAROS

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Astronomy

The ~18-year, 11-day period after which Sun-Earth-Moon eclipse geometry nearly repeats.

The saros is the eclipse period of about 223 synodic months (~18 years 11 and one third days), after which the Sun, Moon and lunar nodes return to nearly the same relative geometry, so a very similar eclipse recurs; it was used for eclipse prediction in Babylonian astronomy (Brack-Bernsen and Steele) and can be derived from orbital mechanics (Chalub). It is a single, well-defined periodicity of eclipse recurrence, an anchor rather than a cross-field collision.[1][2]

Unit
One saros cycle, measured in synodic months (~223) or days (~6585.3).
Recovery means
Match an eclipse to the one ~18 years 11 days earlier in the same series.
Measured by
Counting synodic, draconic and anomalistic month commensurabilities.

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Nearby constructs

collision3 fields · 7 citationsjingle · one word, three constructseclipse2 fields · 3 citationsjingle · one word, two constructsorbital1 fields · 1 citationsanchor · one construct, one field

References

  1. Brack-Bernsen, L., & Steele, J. M. (2005). Eclipse prediction and the length of the Saros in Babylonian astronomy. Centaurus, 47(3), 181-206. https://doi.org/10.1111/j.1600-0498.2005.470301.x
  2. Chalub, F. A. C. C. (2009). The Saros cycle: Obtaining eclipse periodicity from Newton's laws. Revista Brasileira de Ensino de Fisica, 31(1), 1303. https://doi.org/10.1590/s1806-11172009000100003

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