right ascension

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Related to right ascension: declination
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  • noun

Synonyms for right ascension

(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky

References in periodicals archive ?
In the sky, "latitude" is called declination and "longitude" is called right ascension.
Newcomers can get thrown by such arcane-sounding terms as "arcsecond," "4th magnitude," and "right ascension." But they're not as tough as they sound.
From the 17th-century records Shara, Moffat and Webbink determined the position of the nova as right ascension 19 hours 45 minutes 32.41 seconds and declination +27[deg.] 11' 22.6".
Yet we don't call these longitudes "left ascension" but rather "right ascension." Similarly, "declination" sounds like something declining downhill from the equator, but what it measures is an increasing angle, so it arguably could be called "inclination."
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