Assertion: meridian circle | /r/CapableOf | enable the observer
Facets:
value: to determine right ascension
type: PURPOSE
value: to determine declination
type: PURPOSE
Source sentences:
text: A meridian circle enabled the observer to simultaneously determine right ascension and declination, but it does not appear to have been much used for right ascension during the 17th century, the method of equal altitudes by portable quadrants or measures of the angular distance between stars with an astronomical sextant being preferred.