mean noon

American  

noun

Astronomy.

1. the moment when the mean sun's center crosses the meridian.

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Example Sentences

The equation of time and the sidereal time of mean noon complete the ephemeris proper.

From Side-Lights on Astronomy and Kindred Fields of Popular Science by Newcomb, Simon

In the present case, where we are concerned with mean time, mid-day means the instant of mean noon, or of the passage of the mean sun over the meridian.

From International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings by Various

The circles on the tracks indicate the position of the storm centres at Greenwich mean noon on successive days.

From North America by Russell, Israel C. (Cook)

Subtract the R.A. of the Mean Sun at local mean noon from the star's R.A. just found on p.

From Lectures in Navigation by Draper, Ernest Gallaudet

The result will be the distance in sidereal time the star is from your meridian i.e., the time interval from local mean noon expressed in units of sidereal time.

From Lectures in Navigation by Draper, Ernest Gallaudet