North polar distance
| (Astron.) | the distance on the heavens of a heavenly body from the north pole. It is the complement of the declination. |
See also: Distance
| 单词 | north polar distance | ||
| 释义 | North polar distance
See also: Distance north polar distancenorth polar distance(NPD) The angular distance of a celestial object from the north celestial pole, measured along the object's hour circle. It is the complement of the object's declination (90°–δ) and is sometimes used instead of this coordinate in the equatorial coordinate system.north polar distance[′nȯrth ¦pō·lər ′dis·təns] |
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