declination$19307$ - definizione. Che cos'è declination$19307$
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Cosa (chi) è declination$19307$ - definizione

ASTRONOMICAL COORDINATE
Angle of declination; Declinations; Declinational; Declinationally; Declination angle
  • vernal equinox]], the ascending node of the [[ecliptic]] (red) on the celestial equator (blue). Declination is measured northward or southward from the celestial equator, along the [[hour circle]] passing through the point in question.
  • [[Right ascension]] (blue) and '''declination''' (green) as seen from outside the [[celestial sphere]].
  • equator]] (green) and is positive northward (towards the top), negative southward (towards the bottom). The lines of ascension (blue) divide the sky into [[small circle]]s, here 15° apart.

Angle of Declination         
The angle of error of the magnetic needle or compass, measuring the extent of its deviation from the meridian in any locality. It is the angle between the plane of the magnetic axis of a magnetic needle free to take its natural position, and the geographical meridian, the needle being counterpoised if necessary, so as to hold an absolutely horizontal position. The deviation is expressed as being east or west, referring always to the north pole. (See Magnetic Elements.) Synonym--Variation of the Compass. [Transcriber's note:  See Agonic Line.]
declination         
n.
1.
Bending, inclination.
2.
Deterioration. See declension, 1.
3.
Deviation, departure, oblique movement.
4.
Declinature. See declension, 3.
declination         
[?d?kl?'ne??(?)n]
¦ noun
1. Astronomy the angular distance of a point north or south of the celestial equator.
the angular deviation of a compass needle from true north.
2. US formal refusal.
Derivatives
declinational adjective

Wikipedia

Declination

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. Declination's angle is measured north or south of the celestial equator, along the hour circle passing through the point in question.

The root of the word declination (Latin, declinatio) means "a bending away" or "a bending down". It comes from the same root as the words incline ("bend forward") and recline ("bend backward").

In some 18th and 19th century astronomical texts, declination is given as North Pole Distance (N.P.D.), which is equivalent to 90 – (declination). For instance an object marked as declination −5 would have an N.P.D. of 95, and a declination of −90 (the south celestial pole) would have an N.P.D. of 180.