August 14, 2017


It came to my attention recently that I gave y'all an example of harmonics in use, but I didn't do anything to help you learn to cast them! I'm sorry! This should do it. The instructions follow the text.

Harmonic charts are like no other charts and have their own special set of rules, but they are few, and well worth learning because harmonics are some of the most accurate predictive tools in the astrologer’s toolbox. They are so useful that they can quickly rectify a chart when a narrow span of time is known (born at breakfast, born at lunch), or when choosing between times (Was Bob born at 5 A.M. or 5 P.M.?), and reveals distinctions between twins.  

There are only two places online, of which I’m aware, to observe harmonics in use. One was the now defunct website of Dymock Brose [1]. The other is the website of Alice Portman, one of our most knowledgeable and notable contemporary astrologers. [2]

To novice astrologers, harmonics can seem daunting. The planets don’t adhere to the normal rules.  In “normal” astrology, we are bound by the constraints of time and space that require Mercury and Venus to remain within forty-five degrees of the sun at all times. Not so with harmonics. They can appear anywhere in the chart. In “normal” astrology, the moon’s nodes are always opposite each other. Not so in harmonics. They often make no aspect to each other at all; however they are either conjunct or in opposition at every birthday. In “normal” astrology, the midheaven is the zenith of the chart, but in harmonics, there are two midheavens; the static midheaven is still the cusp of the 10th house just as in a “normal” chart, and the floating midheaven, which can appear anywhere. The house in which it floats is significant.

Harmonics provide a way of seeing the causal patterns in a chart. Divide everything in the chart by two, and the oppositions stick out. Divide everything by five and all the quintiles appear. We can divide it by any number of which we can conceive, and each has an implication of its own. For instance, the fifth harmonic is associated with knowledge and skill, the seventh with creativity, and the eighth with effort, energy and its expression in the world, according to Working With Astrology (which also covers midpoints and Astro*Carto*Graphy) by Harding and Harvey. [3] SolarFire astrology software (and probably others with which I’m not familiar) will calculate harmonic charts for you. If you don’t have astrology software, you can create them free of charge at by using the Extended Chart Selections options. You can also calculate them by hand, but it’s tedious work.

The most useful to me, and one of my personal favorites, are age harmonics, where we divide the chart by our age (or by whatever age we’d like to see), and the most definitive aspect reveals in a glance what’s important for the year. Very often, the most definitive is the closest aspect between two planets, but it might also be a stellium or a major configuration. Prove this to yourself now by calculating the harmonics for the age you married, or the age of some other highly significant year in your life. But first de-select all the asteroids, fixed stars and other extras with which novice astrologers like to clutter their charts. Use only the ten planets of our solar system, the moon’s nodes and the part of fortune. When you’ve stripped the chart down to those basics and studied it, then you may add back your favorite asteroids for a second look. I use Chiron, Transpluto, the eastpoint and the vertex. If you simply must have all that clutter, experiment with it later. For now, keep it simple.

First, change your natal chart to the Porphyry house system, and use it throughout this entire process. As you go along, you'll find that it has very sensitive house cusps! 

The other harmonic charts I use constantly are daily age harmonics. This is a harmonic chart calculated for whatever portion of the year we’d like to see into, zeroing in on a specific day, and read the same way as age harmonics. Here's the math, followed by an example:

  1. To get the harmonic number for a specific day, enter 365.24220461 into your calculator’s memory, and then clear the entry field.

  1. Now retrieve the Julian day of your birth.

In Solar Fire:

    • Open your chart
    • Click on Reports
    • Click on Chart Analysis
    • Near the top right, find “JDE = ” a seven digit number followed a decimal and six more digits. If you were born at any time in the 1900’s through 2099, the number should begin with a 24. Use only the numbers that precede the decimal.


·         Use the Julian Day converter at (top of the page). I tried several others and this is the only one that gave the right answer quickly and simply.


·         You can also use your ephemeris, but it will require some counting and it’s important to understand that some of them use a different starting point from software. Don’t mix apples and oranges. You are likely to find the number at the bottom of the page where the phenomenon is listed.

  1. Now retrieve the Julian Day of the day in question, past or future. Want to see what the harmonics were on your 16th birthday? Your wedding day? The day you finally broke up with that bum? If you will win the lottery on the next drawing? Call this your target date.

  1. Subtract the Julian Date of your birth from the Julian Date of your target date.

  1. Divide the answer by the 365.24220461 stored in your calculator’s memory. Click on “=”

  1. The result should be your age at the time in question, followed by several digits after the decimal point. Use the first six of those numbers, and put them in the harmonic field of your software program.

Here’s an example:

Stevie Nicks won a Grammy on February 23, 1978                 Julian:              2443563
Stevie Nicks birth date is May 26, 1948                                 Julian:              2432697
Subtract                                                                               Equals                 10866
Divide 10866 by 365.24220461                                              Equals           29.750121

29.750121 was her age and the fraction of the year which had passed since her previous birthday. Because her birthday is in May, and she won the award nine months after her 29th birthday and three months prior to her 30th, the fraction following the decimal is a high number. Her next age harmonic following this one would be 30. If she had won the Grammy the week after her 29th birthday, the age harmonic number would look more like this: 29.019099. If she had won it the week before her 30th birthday, it would look more like this: 29.9718992. 

Her charts appear below.

Casting a Daily Age Harmonic chart takes a bit more effort, but it’s not difficult, and once you’ve done a few of them, it becomes second nature. 

[1] (I have found some of these through the Wayback Time Machine )

[3] Harding, Michael and Harvey, Charles. Working with Astrology The Psychology of Harmonics, Midpoints and Astro*Carto*Graphy. Arkana Books, a division of Penguin Group. 1990 

Here's a little more information regarding things you'll find in Ms. Nick's natal and daily age harmonic chart: 

The ascendant in a chart is the degree and sign that is rising on the local horizon at the time of our birth. The eastpoint is the degree and sign rising on the equator at the time of our birth. Sometimes it is called the equatorial ascendant. For now, we'll limit the definition to personal matters which take place in public, or which gain public notice, or capture the public’s imagination. It’s almost a melding together of the ascendant and midheaven.


The vertex is a secondary or “another” descendant known as a date with destiny. It is associated with encounters and experiences over which we have little or no control. It represents fate and the ability to penetrate alternate realities and other realms. It’s said that two people whose vertex conjunct each other’s natal ascendant (orb of 2 degrees or less) are soul mates and have the ability to reach each other across the universe. 


Transpluto is not transiting Pluto. It is a hypothetical planet that may exist beyond the orbit of Pluto—thus the use of the prefix "trans." Its glyph looks like Mars wearing a belt. It is one in a stable of other hypothetical planets used by Uranian astrologers. I am not a Uranian astrologer and it would be incredibly hypocritical of me to knock something I know nothing about. 

In my research, I have found it to represent payoffs and winning. Some have called it a Super Venus. 

Stevie Nick's Natal Chart

Stevie Nick's Daily Age Harmonic for Grammy Win
February 23, 1978

As noted in the instructions for casting harmonic charts, very often, the most definitive is the closest aspect between two planets, but it might also be a stellium or a major configuration. In the chart above of Ms. Nick's daily age harmonic, I've defined what's important in the chart. 

1. The closest aspect between the planets is the Jupiter -  Uranus conjunction at 1 degree, one minute orb. It's also angular, being a few degrees below the descendant. Five degrees on either side of an angle indicates strong energy. Venus squares Jupiter. She won the Grammy in association with her band mates in Fleetwood Mac - "significant others" indicated by the 7th house. 

2. Transpluto, the Super Venus associated with winning and payoffs, conjuncts the static midheaven. 

3. The vertex date with destiny and the moon, ruler of the static midheaven conjuncts the ascendant. The moon is in mutual reception with Venus, ruler of the ascendant and 8th house of public support. Chiron, the Cinderella asteroid opposes the moon, and is angular.

4. Mars trines Saturn. In her natal chart, Mars is the ascendant ruler and Saturn is the ruler of the midheaven. The orb is one degree, two minutes, just one minute greater than the Jupiter - Uranus conjunction.

I honestly don't know the significance of the floating midheaven in the 9th house. Maybe it had something to do with her beliefs. Some astrologers associate the 9th house with joy because it's the house of Jupiter in the natural zodiac.

Stevie Nick's Daily Age Harmonic 29.75012 compared to her 
Natal Chart

In the comparison of the daily age harmonic to Stevie Nick's natal chart, harmonic Chiron, the Cinderella planet associated with winning, makes a partile conjunction to her natal ascendant. For those who may not know, "partile" means "exact." 

Jupiter and Uranus are a bit too far above the ascendant to be considered the rising planets in natal astrology, but they certainly do seem to have something to say here. They're the most significant aspect in the harmonic chart. They oppose her natal vertex date with destiny. Her natal eastpoint, indicating personal matters which take place in public, or which gain public notice, or capture the public’s imagination, is mixed in there with the ascendant, and harmonic Jupiter Uranus Chiron. 

Transpluto, conjunct the static midheaven of the harmonic chart, is still angular by opposing the natal midheaven. While in that area of the chart, notice that Venus is nearly conjunct Venus. It has a wider orb than is normally acceptable in harmonics, but does seem to add some information. It's the harmonic chart ruler, and planets returning to their own places seem to gain strength. 

The harmonic moon, indicative of emotional reactions (among other things, of course), and the harmonic vertex date with destiny are angular. 

The harmonic sun of identity, ego and vitality, conjuncts her natal Saturn, ruler of her natal midheaven. Notice that they are on the cusp of the 5th house of creativity, entertainment, competitions, and risks and gambles. This is an example of the sensitive house cusps of the Porphyry house system. Another one is the harmonic north node on the cusp of the 8th house of public opinion. The north node is almost conjunct natal Chiron, and yes, it is wider than the suggested two degree orb, but with practice, we learn to judge these things. Besides, if you're Aquarius, like me, you bend rules. 

Harmonic Pluto, planet of power and transformation, rules the 8th house, and trines natal Chiron, the Cinderella asteroid, by just 22 minutes. 

Finally, harmonic Neptune, planet of music, dreams and visions, conjuncts the natal Jupiter, ruler of the 9th in the 9th. Along with the floating midheaven, which appeared in the 9th house of the daily age harmonic, maybe Ms. Nick's had a hand in manifesting her own destiny. In research, I often find that Neptune, which is associated with the 12th house of other realms, plays a role in winning, where the winner asks, "Am I dreaming, or is this real?" 

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