Thanks Bojan, although I'm still confused....
Quote:
Originally Posted by bojan
RA (or more correctly AR - Ascension Recta - see here: http://books.google.com.au/books?id=...0recta&f=false) is a (sideral) time, elapsed between culmination moment of Ascending node (intersection point of Ecliptic and Celestial equator) and the culmination moment of the object in question. |
Does this mean the point where the ecliptic and celestial equator intersect is 0hr 0' 0"? What do you mean by culmination moment?
Quote:
Originally Posted by bojan
Or, if we divide the celestial equatorial circle by 24, and each section we call "hour", then if we divide each "hour" by 60 "minutes" and so on, then AR is distance between celestial meridians of Ascending node and the meridian of a said object.
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I'm a bit confused by this...I thought the ascending node was the point at which an object's plane intersects the ecliptic as it moves from south to north?