DreamingTheSeas

11-20-2011, 09:51 AM

The math for this isn't really hard, it's just tedious. This works only for Ascendant/Descendant. For Primary Directions to the MC, it's different math (but easier) since you're working mostly with Right Ascension. Planet to Planet aspects is not too much more complicated, but different still.

There are only 5 terms you need to know (and the abbreviations I use so I don't have to type/write so much):

1] Ascensional Difference (AD): difference between the Right Ascension (RA) and Oblique Ascension (OA).

2] Semi-Arc (SA): the Ascensional Difference (AD) +/- 90° it is added if Declination is North, but subtracted if Declination is South (and I hope people living in the Southern Hemisphere understand that is reversed and why).

3] Meridian Distance (MD): is the difference between the Right Ascension of the Midheaven (RAMC) and the Right Ascension of the Nadir (RAIC) and the Planet's Right Ascension.

4] Arc of Direction: the difference between the Semi-Arc (SA and the Meridian Distance (MD).

5] Equatorial Time: Proportion of Distance traveled. Simply divide by 12

Going back to this Chart, we'll use Ptolemy's method to calculate the base Life-Span:T

I am trying to understand this but i get confused. My Moon is in 10th sign and i am a night born person. So (i think) my Hyleg is Moon.

My birth longitude is 39,38 N.

My Moon in Celestial longitude is 177, 54 so lets say 178.

My MC is 174,44 in Virgo.

AD is 98.

SA is 98 +90= 188

MD is 174-98= 76

Arc of Dir is 188-76= 112

Then i move to the Descendant (clock wise) and is 181,13 in Libra. So,181-112= 69.

The base of life span is 69.

After that is the chaos for me, because I can;t understand when Malefics and Benefics aspects to the Descendant.

Any help will be very very thankful.

There are only 5 terms you need to know (and the abbreviations I use so I don't have to type/write so much):

1] Ascensional Difference (AD): difference between the Right Ascension (RA) and Oblique Ascension (OA).

2] Semi-Arc (SA): the Ascensional Difference (AD) +/- 90° it is added if Declination is North, but subtracted if Declination is South (and I hope people living in the Southern Hemisphere understand that is reversed and why).

3] Meridian Distance (MD): is the difference between the Right Ascension of the Midheaven (RAMC) and the Right Ascension of the Nadir (RAIC) and the Planet's Right Ascension.

4] Arc of Direction: the difference between the Semi-Arc (SA and the Meridian Distance (MD).

5] Equatorial Time: Proportion of Distance traveled. Simply divide by 12

Going back to this Chart, we'll use Ptolemy's method to calculate the base Life-Span:T

I am trying to understand this but i get confused. My Moon is in 10th sign and i am a night born person. So (i think) my Hyleg is Moon.

My birth longitude is 39,38 N.

My Moon in Celestial longitude is 177, 54 so lets say 178.

My MC is 174,44 in Virgo.

AD is 98.

SA is 98 +90= 188

MD is 174-98= 76

Arc of Dir is 188-76= 112

Then i move to the Descendant (clock wise) and is 181,13 in Libra. So,181-112= 69.

The base of life span is 69.

After that is the chaos for me, because I can;t understand when Malefics and Benefics aspects to the Descendant.

Any help will be very very thankful.