Definition of Right ascension

1. Noun. (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; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere. "One hour of right ascension equals fifteen degrees"

Exact synonyms: Celestial Longitude, Ra
Category relationships: Astronomy, Uranology
Generic synonyms: Angular Distance



Definition of Right ascension

1. Noun. (astronomy) The angular distance east of the vernal equinox point; the celestial equivalent of longitude. ¹

¹ Source: wiktionary.com

Lexicographical Neighbors of Right Ascension

right-to-die
right-to-left shunt
right-to-life
right-to-lifer
right-wing
right-winger
right-wingers
right along
right and left
right angle
right angle clamp
right angles
right as a trivet
right as rain
right ascension (current term)
right atrioventricular valve
right atrium
right atrium of heart
right atrium of the heart
right auricular appendage
right away
right axis deviation
right back
right backs
right bank
right banks
right border of heart
right bracket
right brackets

Literary usage of Right ascension

Below you will find example usage of this term as found in modern and/or classical literature:

1. An Introduction to Astronomy by Forest Ray Moulton (1916)
"(1) Since June 21 is three months after March 21, the right ascension of the sun ... (2) Since the time of day is 8 PM, and the right ascension is counted ..."

2. Navigation and Nautical Astronomy: The Practical Part, Containing Rules for by H. W. Jeans (1853)
"To take out the right ascension of the mean sun (called in the Nautical Almanac sidereal time). The right ascension of the mean sun, or the sidereal time at ..."

3. A Manual of Spherical and Practical Astronomy: Embracing the General by William Chauvenet (1891)
"The instrumental constants and the i lock correction and rate being found from known stars as above explained, the right ascension of any other star is ..."

4. The New American Practical Navigator: Being an Epitome of Navigation ...by Nathaniel Bowditch by Nathaniel Bowditch (1826)
"Find the right ascension of the sun and star in the preceding tables VI. and VIII ; subtract the sun's right ascension from the star's, having previously ..."

5. American Edition of the British Encyclopedia: Or, Dictionary of Arts and ...by William Nicholson by William Nicholson (1819)
"For this porpose the sun's right ascension at the preceding noon, together with the increase of right ascension from noon, must he added to the apparent ..."

6. A Manual of Spherical and Practical Astronomy: Embracing the General by William Chauvenet (1874)
"The instrumental constants and the clock correction and rate being found from known stars as above explained, the right ascension of any other star is ..."

7. Annals of the Astronomical Observatory of Harvard College by Harvard College Observatory (1895)
"This star is in right ascension 12". This star is in right ascension 12*. This star is in right ascension 15*. 516. a 2164. Retained. 525. z 2394. ..."

8. A Dictionary of Mechanical Science, Arts, Manufactures, and Miscellaneous by Alexander Jamieson (1829)
"To find the right ascension and declination of the sun, or a star.— Rule. Bnng the sun, or star, to that part of the brass meridian numbered from the ..."

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