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sidereal hour

См. также в других словарях:

  • Sidereal hour — Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The …   The Collaborative International Dictionary of English

  • sidereal hour — noun 1/24 of a sidereal day • Hypernyms: ↑hour, ↑hr, ↑60 minutes, ↑sidereal time * * * noun : the twenty fourth part of a sidereal day …   Useful english dictionary

  • sidereal hour — noun Date: circa 1695 the 24th part of a sidereal day …   New Collegiate Dictionary

  • sidereal hour — /saɪˌdɪəriəl ˈaʊə/ (say suy.dearreeuhl owuh) noun one 24th part of a sidereal day …  

  • sidereal hour angle — Astron. the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body. Cf. hour angle. * * * …   Universalium

  • sidereal hour angle — noun : a coordinate in the equator system of coordinates used by navigators in place of right ascension, measured westward from the March equinox, and expressed in degrees up to 360° * * * Astron. the angle, measured westward through 360°,… …   Useful english dictionary

  • sidereal hour angle — The angle about the celestial pole between the celestial meridian of the first point of Aries and the celestial meridian of the body, measured westward from the celestial meridian of the first point of Aries …   Aviation dictionary

  • sidereal time — n. 1. time measured by the sidereal day: it is divided into the sidereal hour (1/ 24 of a sidereal day), the sidereal minute (1/ 60 of a sidereal hour), and the sidereal second (1/ 60 of a sidereal minute) 2. the hour angle of the vernal equinox …   English World dictionary

  • Hour — Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The… …   The Collaborative International Dictionary of English

  • Hour angle — Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The …   The Collaborative International Dictionary of English

  • Hour circle — Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The …   The Collaborative International Dictionary of English

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