Transit circle


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(Astron.) a transit instrument with a graduated circle attached, used for observing the time of transit and the declination at one observation. See Circle, n., 3.

See also: Transit

References in periodicals archive ?
A six feet transit circle erected at Greenwich Observatory by Edward Troughton.
The Meridian building houses an impressive collection of telescopes, including the Airy Transit Circle, a 10ft instrument which defined the Greenwich Meridian until 1850.
Display Cupboard 5: The bottom shelf contains remnants of the 'Airy Transit Circle' which used to occupy one room of the main building of the Royal Observatory.
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