astronomical position line

A position line obtained by sighting a planetary body.
From the geographical position, an arc is drawn which is equal to the zenith distance of the body. A tangent to this arc is the astro position line. To obtain a fix, either another astro, or terrestrial position line is drawn.

Aviation dictionary. 2014.

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  • Position — Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound}, v.,… …   The Collaborative International Dictionary of English

  • Position finder — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

  • Position micrometer — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

  • astronomical map — Introduction       any cartographic representation of the stars, galaxies, or surfaces of the planets and the Moon. Modern maps of this kind are based on a coordinate system analagous to geographic latitude and longitude. In most cases, modern… …   Universalium

  • Astronomical clock — An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. DefinitionThe term is loosely used to… …   Wikipedia

  • Line of collimation — Collimation Col li*ma tion, n. [Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col + linea line. Cf. {Collineation}.] The act of collimating; the adjustment of the line of the sights, as the… …   The Collaborative International Dictionary of English

  • Astronomical transit — The term transit or astronomical transit has three meanings in astronomy:* A transit is the astronomical event that occurs when one celestial body appears to move across the face of another celestial body, as seen by an observer at some… …   Wikipedia

  • Position micrometer — Micrometer Mi*crom e*ter, n. [Micro + meter: cf. F. microm[ e]tre.] An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given… …   The Collaborative International Dictionary of English

  • Angle of position — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

  • Double position — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

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