英语词汇“position angle”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

position angle n. an angle giving the direction at which a point lies with respect to another point; (esp. in Astronomy) the angle between the hour-circle passing through a celestial object and the great circle joining that object to another celestial object (also called angle of position).

ΘΚΠ

the world > the universe > heavenly body > position of heavenly body > [noun] > position angle

angle of position1812

position angle1862

1862 Philos. Trans. (Royal Soc.) 152 358 I paid most particular attention to the prominence A, because I knew from its position that it was critically placed for the observation of any change of position-angle in reference to the moon's centre.

1870 Nature 24 Mar. 543/1 That observer records the position-angles and apparent distances of the satellites of Uranus.

1893 R. S. Ball Story of Sun 170 The angle between the pole projected on the Sun's disc and the north point is what we call the position angle.

1970 Jrnl. Brit. Astron. Assoc. 80 216 Predicted times and position angle are [etc.].

1998 Mod. Astronomer Mar. 34/2 (table) Libration is the varying angle at which we see the Moon's disc, measured in degrees, and the Position Angle (P.A.) of the limb with the greatest tilt towards Earth, measured from the north pole on the Moon (0°), through east (90°) etc., is shown.

单词	position angle
释义	> as lemmas position angle position angle n. an angle giving the direction at which a point lies with respect to another point; (esp. in Astronomy) the angle between the hour-circle passing through a celestial object and the great circle joining that object to another celestial object (also called angle of position). ΘΚΠ the world > the universe > heavenly body > position of heavenly body > [noun] > position angle angle of position1812 position angle1862 1862 Philos. Trans. (Royal Soc.) 152 358 I paid most particular attention to the prominence A, because I knew from its position that it was critically placed for the observation of any change of position-angle in reference to the moon's centre. 1870 Nature 24 Mar. 543/1 That observer records the position-angles and apparent distances of the satellites of Uranus. 1893 R. S. Ball Story of Sun 170 The angle between the pole projected on the Sun's disc and the north point is what we call the position angle. 1970 Jrnl. Brit. Astron. Assoc. 80 216 Predicted times and position angle are [etc.]. 1998 Mod. Astronomer Mar. 34/2 (table) Libration is the varying angle at which we see the Moon's disc, measured in degrees, and the Position Angle (P.A.) of the limb with the greatest tilt towards Earth, measured from the north pole on the Moon (0°), through east (90°) etc., is shown. extracted from positionn. < as lemmas
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