The Sarosnumber (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -1436March 30 and ended on -156May 7. The duration of Saros series 45 was 1280.1 years, and it contained 72 solar eclipses.
The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -1369August 19 and ended on 182March 8. The duration of Saros series 45 was 1550.6 years, and it contained 87 lunar eclipses.
In other fields
Forty-five is also:
The total of books in the Old Testament of the Holy Bible in the Catholic version if the Book of Lamentations is considered part of the Book of Jeremiah.
In reference to gramophone records, 45 refers to a type of record by its revolution speed of 45 revolutions per minute (rpm). These small discs usually contained one song on each side which resulted in calling such records singles.
Originally the 45 RPM record was introduced as a longer play version of the 78 RPM discs. The first 45 RPM records were monaural with recordings on both sides of the Disc. Produced in several sizes, the 7" large hole version became the most popular. As stereo recordings became popular in the 1950s, almost all of the newer 45 RPM records were recorded in Stereo.
The title of a book of essays by record producer Bill Drummond, derived both from the speed of a pop single and from his age when he finished writing it.
The code for international direct dial phone calls to Denmark.
In the Ishihara color test, 45 is on a plate of blue, green, red and brown circles which people with normal vision can discern but colorblind people can't see
Such records were usually sold separately, in plain paper or cardboard sleeves that may have been printed to show producer of the retailer's name and sometimes in collections held in paper sleeves in a cardboard or leather book, similar to a photograph album, and called record albums.
While a 78rpmrecord is brittle and relatively easily broken, both the microgroove LP 33⅓ rpmrecord and the 45rpm single records are made from vinyl plastic which is flexible and unbreakable in normal use.
Records are made at large manufacturing plants, either owned by the major labels, or run by independent operators to whom smaller operations and independent labels could go for smaller runs.
In the older record format, there was no "track 1" as the disc itself was reversible, so the difference between an A-side and a B-side was one of promotion.
The first 45RPMrecords were monaural, with recordings on both sides of the disc.
As stereorecordings became popular in the 1960s, almost all 45RPMrecords were produced in stereo by the end of the decade.
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