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Converting Declination to Zodiac Degrees by hand

Astrology derives meaning from planets’ positions along the ecliptic (the Sun’s apparent path through the zodiac).  But
most of the time, except for the Sun, planets are located off the ecliptic. So we must decide which point(s) along the
ecliptic to use as a planet’s zodiac degree.  Astrologers almost exclusively use the longitudinal zodiac degree for
position reference (the zodiac degree the Sun would be at if it were at that planet’s degree of Longitude).  But that is just
one of three zodiac degrees that correlate to the planet’s actual position in our sky.  The other two are the planet’s
“Declination-Equivalent” and “Declination-Antiscia” zodiac degrees.

Converting declination to zodiac degrees is most easily done using software designed to do the conversion, such as
Halloran’s AstrolDeluxe.  If your software does not have this function, you can do the conversion by hand.

To convert a planet’s declination to the corresponding zodiac degrees (called “Declination-Equivalent” and “Declination-
Antiscia”), we simply find the zodiac degrees where the sun would be at if it were at that planet’s degree of declination.  
The easiest way to do this is by using a declination to zodiac degree conversion table (click link for table).  
Find the planet’s degree of declination in the left column and read across that row for the corresponding zodiac
degrees.  For North declination use the two zodiac degrees in the middle column; for South declination use the two
zodiac degrees in the right column.  Of the two zodiac degrees, the one closest to the planets regular “Longitudinal”
zodiac degree is its Declination-Equivalent zodiac degree.  The other one is its Declination-Antiscia zodiac degree.

You will occasionally run across planet’s at declination degrees greater than the Sun’s maximum declination of
23N/S27.  Kt Boehrer coined the term “Out of Bounds” for such planets.  For Out of Bounds planets, we must adjust the
declination degree before converting it to a zodiac degree.  We subtract from the Sun’s maximum declination the
number of degrees and minutes by which the planet’s declination exceeds the Sun’s maximum.  For example, if a planet
is at 24N32 we subtract 1 degree and 05 minutes from the Sun’s maximum of 23N27 to get 22N22.  We can then use the
conversion table to find the corresponding zodiac degrees of  13Gem01 and 16Can59.

When converting all the planets in a chart to Declination-Equivalents, remember that the Sun, Nodes, Ascendant and
Midheaven do not need to be converted because they are already on the ecliptic.  When converting all the planets in a
chart to Declination-Antiscia, the Sun and Nodes must also be converted, but the angles stay the same.


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