Saros · Astrological definition of Saros · Astrology Encyclopedia  ·  April 19, 2024, 22:17 GMT
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Saros

Saros - Astrology Encyclopedia

Definition of Saros (1) A Chaldean and Babylonian interpretation of a cycle of 60 days as 60 years.
(2) 60 sixties, or 3,600.
(3) A lunar cycle of 6,585.32 days - 223 lunations; or 18 years, 11 1/3 days. In this period the centers of Sun and Moon return so nearly to the same relative places that the eclipses of the next period recur in approximately the same sequence - but with their zone of visibility shifted 120 to the Westward. (v. Eclipses.)

Because the Node recedes 19.5 a year, the Sun meets the same Node in 346.62 days - the eclipse year. As this does not coincide with the Lunar periods, the Sun moves past the node a degree a day for as many days as it takes for the Moon to reach a conjunction or opposition. Thus either a Solar or Lunar Eclipse may occur before or after the Sun reaches the Node, or both before and after. If the Lunation occurs within 2 or 3 days before or after the Sun reaches the Node there may be no accompanying Lunar Eclipse, as on Dec. 3, 1918 and May 29, 1919 (Saros Series 11).

If the Lunation or Full Moon occurs from 4 to 9 days before the Sun reaches the Node, there will be a Lunar Eclipse followed by a Solar Eclipse, or the reverse. If the Lunation occurs from 10 to 12 days before the Sun reaches the Node there may be a series of three Eclipses: a Solar before the Node, a Lunar at the Node, and another Solar when the Sun has passed beyond the Node. Associated with this are certain values:

......................................................Days

...242 returns of the Moon to a particular Node.......6585.36

....19 returns of the Sun to the same Node............6585.78

...233 Synodic months.................................6585.32

(Nicholas deVore - Encyclopedia of Astrology)

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