Relationships and the forgotten Novile

1
A Novile (9) occurs when two planets are forty degrees or a multiple apart. This aspect can sometimes indicate ceremony and relate to marriage, as it carries a Jupiter influence.
In synastry, we recognize the flowing energy of the sextiles and trines. The novile is in the same family. 3 X 40 = 120d
It is also called the 9th Harmonic (360 / 9 = 40)
In his blog, John Sandbach says: "The 9th harmonic signifies the marriage partner, and can be thought of as the chart of our ideal mate... I have found that there is often a very strong resonance between the charts of people we are attracted to and our 9th harmonic."
http://john-sandbach.blogspot.com/2009/ ... spect.html
Planets are waves and Harmonics are another way to look how our chart vibrates with other degrees of the zodiac and people around you.
A planet in the same sign in both the birth chart and 9th Harmonic is regarded as stronger, for good or bad depending on the dignity of this planet in our chart.
These degrees are
Cardinal Signs: From 0d to 4d 20m
Fixed Signs: From 13d 20m to 16d 40m
Mutable Signs: From 26d 40 to 30d
And you will discover that 0 degree of the Cardinal signs falls at the same place in the 9th Harmonic.

Of course, synastry, composite chart and midpoints are all good ways to compare 2 charts. 9th Harmonic is just another tool in your arsenal.
Modern astrologers, John Addey, Michael Harding, Charles Harvey, David Hamblin, James & Ruth Williamsen and David Cochrane are the ones you can look at to better understand the concept of Harmonics or Planetary Waves.
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Formula: Zodiacal position X 9 = 9th Harmonic position
If greater than 360, substract 360 until you come up with a number within 360.
In Planetdance, go to Horoscope> Harmonics> Harmonic Calculator and you will have the first 12th Harmonics of your chart.
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Orb: The orb is defined by the Harmonic itself. 9th Harmonic= 9 degrees orb 5th Harmonic = 5 degrees orb and so on.
To better understand, let's say you have a planet at
2 Aries X 9 = 9th Harmonic is at 18 Aries
3 Aries X 9 = 9th Harmonic is at 27 Aries
So the 1 degree orb becomes 9 degrees in the 9th Harmonic.
Look at significant others in your life to narrow down this orb but as so many charts are not accurate to the degree, be more flexible with the ASC and MC and the closer the better.
When comparing the 9H to the Natal or 9th Harmonic of someone else, use the conjunction only.
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Transits: A transit of inner planets over a 9th Harmonic degree might not be enough for you to start a long-term relationship.
I suggest looking at Jupiter, Saturn and the New Moon/Full Moon phases to be significant.

I met my Significant Other, April 4, 1981 under a NM when Sun/Moon/Venus/Mars in the same degree at 15 degrees Aries were conjunct her NN (relationship) and my 9th Harmonic ASC.
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Examples

John Lennon and Paul McCartney

John Lennon 9 Oct 1940 18h30 Liverpool
https://www.astrotheme.com/Focus-Astro- ... Lennon.php
Natal ASC 19 Ari 54 X 9 = 9thH ASC = 29 Virgo 02

Paul McCartney 18 June 1942 14h Liverpool
Natal ASC = 25 Virgo 18
https://www.astrotheme.com/astrology/Paul_McCartney

Lennon's 9th Harmonic ASC is conjunct the natal ASC of McCartney
Talking about a fusional relationship. We are one!
And McCartney 9thH Moon/Neptune connects with Lennon's Venus.
Transit:
They met July 6, 1957 when Jupiter was at 25 Virgo conjunct their shared ASC
They last met April 24, 1976 when transiting Saturn was at 26 Can 41 squaring
Lennon's 9thH Saturn 28 Ari 56 and McCartney 9thH Mars 24 Ari 07 conjunct Lennon's natal ASC.
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John Legend and Chrissy Teigen

John 28 Dec 1978 8h25 Springfield, Ohio ASC 12Cap21
https://www.astrotheme.com/astrology/John_Legend

Chrissy 30 Nov 1985 6h10 Delta (UT) US ASC 21Sco12
https://www.astrotheme.com/astrology/Chrissy_Teigen

The most striking aspect is the 9th Harmonic ASC of Chrissy falling on the natal ASC/Mars of John in Capricorn. They first met 14 Sep 2006 during a FM at 15 Pisces trine Jupiter in Cancer activating their ASC combinations. With John's Mars in the picture, she says: "We first met on the set of Legend's music video for "Stereo," in which Teigen starred as Legend's love interest. "I walked into John's dressing room to meet him, and he was ironing in his underwear," A very physical attraction!

And they got married 14 Sept 2013 under a NM at 13 Virgo activating their ASC combinations again and Jupiter trine natal Chrissy's Scorpio ASC and planets and 7th House of John.
9th H of John's Mars/ASC is conjunct 9th H of Chrissy's Mars/Saturn. She had a miscarriage and the area between 10 to 20 Aries is sensitive to separations.

Blessings,
Ouranos
Blessings!

3
Hello Srsedna,

Harmonics are always measured in the shorter longitude (Natal) rather than the longer one (Harmonic)
Coming back to the example given above on the 40 degree aspect = 9th Harmonic (1/9 of the circle)
2 Aries X 9 = 9th Harmonic is at 18 Aries
2 Aries 30' X 9 = 9th Harmonic is at 22 Aries 30min
3 Aries X 9 = 9th Harmonic is at 27 Aries
29 Aries X9 = 9th Harmonic is at 261d or 21 Sag
So you see that we stay within a 1 degree orb of the Natal Chart.

For the 45 degree aspect = 8th Harmonic (1/8 of the circle)
2 Aries X 8 = 8th Harmonic is at 16 Aries
2 Aries 30' X 8 = 8th Harmonic is at 20 Aries 30min
3 Aries X 8 = 8th Harmonic is at 24 Aries
29 Aries X 8 = 8th Harmonic is at 232d or 22 Scorpio

Harmonics is the study of the relationship between wave forms that are direct multiples of each other, and repeat themselves in cycles, like Music.

And these wave forms will cross each other depending what Harmonic you are looking at.

Blessings,
Ouranos
Blessings!