transit instrument


Also found in: Thesaurus, Encyclopedia, Wikipedia.

transit instrument

n
(Astronomy) 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
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.transit instrument - a telescope mounted on an axis running east and west and used to time the transit of a celestial body across the meridiantransit instrument - a telescope mounted on an axis running east and west and used to time the transit of a celestial body across the meridian
telescope, scope - a magnifier of images of distant objects
References in periodicals archive ?
For its regulation Osler provided a transit instrument and an astronomical clock for its rooftop observatory.
Maclear's southern terminal for the repeat of La Caille's work was the centre of the Transit instrument at the Royal Observatory and his northern terminal was a threshing floor that still exists and is marked by a plaque on a farm in the Piketberg.
A transit instrument is used in which scientific discipline?