sextant

Definitions:

  • A navigational instrument containing a graduated 60-degree arc, used for measuring the altitudes of celestial bodies for use in determining the latitude and longitude of the observer.
  • None
  • In <em>mathematics</em>, the sixth part of a circle. Hence An important instrument of navigation and surveying, for measuring the angular distance of two stars or other objects, or the altitude of a star above the horizon, the two images being brought into coincidence by reflection from the transmitting horizon-glass, lettered <em>b</em> in the figure.
  • [<em>capitalized</em>] Same as <internalXref urlencoded="Sextans">Sextans</internalXref>, 2.
  • The sixth part of a circle.
  • An instrument for measuring angular distances between objects, -- used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See <er>Quadrant</er>.
  • The constellation Sextans.
  • a small sextant inclosed in a cylindrical case to make it more portable.
  • A <xref>navigational</xref> device for deriving angular distances between objects so as to determine <xref>latitude</xref> and <xref>longitude</xref>.
  • One <xref>sixth</xref> of a <xref>circle</xref> or <xref>disc</xref>; a <xref>sector</xref> with an <xref>angle</xref> of 60°.
  • a measuring instrument for measuring the angular distance between celestial objects; resembles an octant
  • a unit of angular distance equal to 60 degrees
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