Results for « 经度 15 ° » (cmn)
13888783-n
经度 15 °, 天体 时角, 时角, 经度15°, 时 角, 天体时角
hour angle, HA
     [in astronomy] the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day

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