Declinations, the other dimension of a planet's position in an astrology chart, represented an overlooked technique until astrologer Kt Boehrer books were published. She thoroughfully investigated this subject over many years, bringing to astrologers' awareness the extraordinary power and value of declinations. A high-quality website with many valuable articles on declination is Mandala.be.
Also known as "the declination lady", as she used to sign her messages, she pointed out the importance of out of bounds planets and developed astrological techniques such the declination conversion into longitude.
This technique simply considers that as the Sun moves both in longitude and declination throughout a year, there is a symbolic relationship between a declination degree and the Sun's position in longitude when it has the respective declination. But there're two moments during a year when the Sun has the same declination (named antiscia or solstice points), so there're two longitudes corresponding to a specific declination of the Sun. So, this is it: a planet's position in declination has two equivalent longitudes, representing a sort of reflection, a mirroring, a hidden connection.
It therefore allows correlating the two dimensions, declination and longitude, offering a way to integrate declinations in the regular astrology chart interpretation.
Whenever a planet's declination is higher than the maximum Sun declination (23°27' North/South), whenever a planet is out-of-bounds, the above mentioned technique cannot be applied anymore, so Kt Boehrer figured out a trick for this situation: the planet's declination is considered to have a mirror co-declination on the other side of the 23°27' threshold. Example: a declination of 23°30' has a codeclination of 23°24'.
This is an interesting technique that I just resumed practicing (August 2006) in order to better understand its value. As far as I know there is no astrological software that does these calculations, so I put up this little program to help me and others. I know this article isn't informative and explanatory, but I promise I'll write with details on all astrological terms and concepts related to declination. The only other article published on declinations on this site is Presidential astrological cycles - Progressed Moon in declination cycles.
So, enjoy! Any inquiries - let's discuss them on the forum.
If you want the planetary positions by declination computed for a certain date, click here.