📌 General Definition

Johannes Kepler, the famous astronomer and astrologer, expanded the system of aspects by introducing minor aspects in addition to the traditional Ptolemaic ones (conjunction, sextile, square, trine, opposition).
Kepler believed these smaller divisions of the circle also carried meaningful influences.

While less powerful than the major aspects, minor aspects provide subtle insights into inner tensions, adjustments, and hidden dynamics in the natal chart.

🔹 1. Quincunx / Inconjunct (150°)

• Nature: Adjustment, imbalance, lack of integration.
• Meaning: Represents areas of life that seem incompatible, requiring constant compromise. Creates tension without direct conflict.
• Keywords: Friction, re-alignment, unease, blind spot.

🔹 2. Semisextile (30°)

• Nature: Subtle stimulation, growth potential.
• Meaning: Links signs that are side by side. They have little in common, but their interaction sparks small opportunities for progress and awareness.
• Keywords: Minor opportunity, restlessness, gradual learning.

🔹 3. Quintile (72°)

• Nature: Creative, harmonic, talent aspect.
• Meaning: Often linked with gifts, artistry, and unique abilities. Shows where one can express originality.
• Keywords: Talent, creativity, unique skill, artistry.

🔹 4. Bi-Quintile (144°)

• Nature: Similar to quintile, but with stronger focus.
• Meaning: Special creative drive or talent that may be developed into mastery with effort.
• Keywords: Inspiration, refined skills, higher-level artistry.

🔹 5. Sesquiquadrate (135°)

• Nature: Frustration, minor tension.
• Meaning: Like a “smaller square.” Produces irritations and blockages that push for resolution.
• Keywords: Restlessness, conflict, stress leading to growth.

🔹 6. Semi-Square (45°)

• Nature: Friction, internal pressure.
• Meaning: A weaker version of the square. Indicates areas of low-level irritation that still need attention.
• Keywords: Challenges, discipline, small obstacles.

🔹 7. Novile (40°)

• Nature: Spiritual, introspective, inner harmony.
• Meaning: Often associated with devotion, inner purpose, and cycles of spiritual growth.
• Keywords: Meditation, spiritual insight, karmic lessons.

✅ Summary

• Kepler introduced minor aspects to refine chart interpretation.
• They highlight subtle dynamics often overlooked in major aspects.
• Quincunx (150°) and semisextile (30°) are the most commonly used, but quintiles, sesquiquadrates, and others add valuable nuance.