Passazhnyi instrument
(ot fr. passage – prohod)
Astrometricheskii instrument, prednaznachennyi dlya registracii tochnogo vremeni prohozhdeniya zvezd cherez nebesnyi meridian. Eto pozvolyaet opredelyat' izmeneniya skorosti sutochnogo (sm. Sutki) vrasheniya Zemli i utochnyat' pryamye voshozhdeniya nebesnyh svetil (sm. Koordinat sistema, ekvatorial'naya). On predstavlyaet soboi teleskop, ustanovlennyi na gorizontal'noi montirovke (sm. Montirovka teleskopa, gorizontal'naya).
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