The angular relationships between the planets in a horoscope, measured as angles within a circle, are called aspects. As a general rule, most traditional astrologers use only the major aspects.Many minor aspects listed are rejected by traditional astrologers; these aspects are used by modern astrologers who practice Uranian Astrology and/or Harmonics. Traditional astrologers disregard many of these ambiguous, miniscule aspects that produce minimal effect. As a rule, many of the following aspects prove useless in horary and synastry, and should be considered only when interpreting a natal chart.
A quincunx is when at least two planetary bodies are 150°
degrees apart. This inharmonious aspect is also referred to as the
inconjunct or disconjunct. Many astrologers consider this aspect to be
minor; however, it is not a minor aspect, and the impact can be
With a quincunx, the two signs where the planets lie have absolutely no affinity to one another. Therefore, it basically represents an inharmonious, unpleasant blend of jerky stop and start energy that cannot seem to merge. With this aspect, sometimes things flow well; sometimes things don't. Unlike the conjunction, when two planets join forces, working together, the quincunx is just the opposite. The two planetary bodies involved in the quincunx will forever waver back-and-forth and can never blend or work together. If utilizing energy from one planet involved in the inconjunct, the energy from the other planet will remain inaccessible at that moment and vice versa.
This aspect requires adjustments or compromise.
In synastry, it is guaranteed that two people having a quincunx involving the luminaries will never stay together because they have nothing in common. In synastry, this aspect found amongst personal planets represents nothingness, which proves worse than sharing a bad aspect. This aspect resonates with the number 12.
Semi-Square 8A semi-square or octile is when at least two planetary bodies are 45° degrees apart. A semi-square represents one eighth of a 360° circle. This minor adverse aspect acts to a lesser degree like a square. It pinpoints a challenge requiring action that meets resistance. It is simply felt as an annoyance or restlessness. This aspect resonates with the number eight.
Quintile 5A quintile is when at least two planetary bodies are 72° degrees apart. A quintile represents one fifth of a 360° circle. This beneficial minor aspect reveals where an individual naturally possesses tremendous talent. A quintile acts to a lesser degree like a trine, in that it bestows a free-flowing energy that requires little to no effort. Quintilian attributes are Mercurial and Virgo-like as this aspect concerns itself with specialization, technique and methodology used to accomplish its creative goal. The quintile also reveals personal style imparted within the creative efforts. The quintile series includes the biquintile, decile, tridecile and vigintile. All related aspects act like the quintile to a lesser degree. All are considered to be indicators of where both developed and under-developed unique creative gifts lie. This aspect resonates with the number five.
QuindecileA quindecile is when at least two planetary bodies are 165° degrees apart. This minor neutral aspect is also referred to as a Johndro. It largely indicates an obsession and/or compulsion quality. Quindeciles suggest a marked determination or motivation that can be rather disruptive.
Undecile 11An undecile is when at least two planetary bodies are 32°44' degrees apart. An undecile represents one eleventh of a 360° circle. Undeciles are not used in traditional astrology, and is mostly used by astrologers whom practice the relatively new astrological delineation methodology called Harmonics. The undecile series includes the biundecile, triundecile, quadraundecile and quintundecile. This aspect resonates with the master number eleven.
Bytheriver, Marylee. A Short Dictionary of Astrology, Harper & Row Publishers, 1978.
Thompkins, Sue. Aspects in Astrology: A Guide to Understanding Planetary Relationships in the Horoscope, Destiny Books, 1989.
Reeves, Richenda (Rikki). The Quindecile, Llewellyn Publications, 2001.
Tyl, Noel. http://www.noeltyl.com/techniques/010831.html
Portman, Alice. http://aliceportman.com/quintiles/Wilkinson, Robert. http://www.aquariuspapers.com/astrology/2007/01/quintile_tredec.html