LOCAL MEAN TIME Definition & Meaning

local mean time

Solar time as measured by the position of the mean sun with respect to an observer's local meridian. Like apparent time, local mean time differs continuously with the observer's longitude and is not standardized over a time zone. However, a day as measured by local mean time does not vary in length throughout the year—it is always 24 hours.
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Prior to the institutionalization of standard time, clocks were set using local meridians or local mean time, and they varied widely.

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At 3h. 38m. 40s., local mean time, the first contact took place, and the first photogram taken, shewing a slight indentation on the sun’s limb.

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At 10 p.m., local mean time, January 25, 2008, the tracer hiccupped and, all by itself, went to sleep!

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To find Local Mean Time you must apply the Longitude you are in.

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The result will be the local mean time of the star's meridian passage.

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