The distance of a point east of the First Point of Aries, measured along the celestial equator and expressed in hours, minutes, and seconds. Compare with declination and celestial longitude.
- The motion of the telescope to the east and west is referred to as the right ascension or hour angle of the telescope.
- PSR is astronomical shorthand for pulsar, while 1913 is the pulsar's right ascension in celestial coordinates.
- Any object on the same hour circle will have the same right ascension, just as any place on earth on the same meridian of longitude has the same longitude.
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