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transit instrument
transit instrument
noun
- an astronomical instrument, mounted on an E-W axis, in which the reticle of a telescope is always in the plane of the meridian. It is used to time the transit of a star, etc, across the meridian
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Word History and Origins
Origin of transit instrument1
First recorded in 1805–15
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Example Sentences
At that time, no original observations made at the transit instrument were ever preserved.
From Project Gutenberg
It is the meridian that passes through the poles and the centre of the transit instrument of the Observatory of Greenwich.
From Project Gutenberg
The western arm is a room of the same dimensions, intended for the transit instrument.
From Project Gutenberg
The transit instrument is also used in the prime vertical for the determination of latitudes.
From Project Gutenberg
The direction of the meridian is determined either by a theodolite or a portable transit instrument.
From Project Gutenberg
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