As he gives her the word, she writes down the declination and right ascension and the other circumstances of the observation.
A is the right ascension of the star, and U is the correction of the clock.
This interval of time is simply the difference of their right ascension.
Now (Dec. 3) it has south declination of 34, and right ascension of 19h.
The two apices differ very nearly 180° in right ascension and about 120° in declination.
Declination about minus twenty, as I remember it, and right ascension between six and seven hours.
The distance of any time star from the equinoctial point, in time, is called its right ascension.
As he gives her the word, she writes down the declination and right ascension, and the other circumstances of the observation.
We call A the right ascension of the apex; D its declination.
First there will be the star's name, and in the next column its magnitude, and in a third the star's right ascension.
|right ascension |
The position of a celestial object east of the vernal equinox along the celestial equator. Right ascension is measured in hours, minutes, and seconds from the vernal equinox (0 hours) to the point where a great circle drawn through the object and the north and south celestial poles intersects the celestial equator. Each hour corresponds to 15° of angular distance along the celestial equator for a total of 24 hours. See more at equatorial coordinate system.