11. It is located at right ascension ; declination; under J2000.0 coordinates. 12. The great square is a good marker of celestial longitude, called right ascension by astronomers. 13. The north ecliptic pole is located at right ascension 18 h and declination + 66.5? 14. Maps of the stars in the night sky use declination and right ascension as coordinates. 15. It is located at right ascension 16 h 41.7 m and declination + 36?28 '. 16. They differ by the precession of the vernal equinox in right ascension relative to the stars. 17. In the southern hemisphere the Right Ascension scale operates in reverse from in the Northern Hemisphere. 18. For example, in January and February 2137, it moves retrograde only 34 minutes in right ascension . 19. The direction of its spin vector was 71 degrees right ascension and minus 15 degrees declination. 20. This is called conjunction in right ascension .
