How is the conjunction angle of 0 degrees derived?

0 degrees means the two bodies share a degree of longitude. Aspects are ratios of the circle rather than arbitrary distances, which is why the major set is small: the major aspects come from the simplest divisions, and each further subdivision produces a narrower, more contested aspect.

What orb should a conjunction use?

This site uses 8 degrees by default for the conjunction. Orb is a convention, not a measured quantity: there is no agreed value, practitioners commonly tighten orbs for minor aspects and for slow-moving bodies, and some assign orb to the planets involved rather than to the aspect. Widen the orb and more aspects appear; narrow it and the same chart looks sparse. Any aspect list is therefore only comparable to another when both state the orb used.

Is the conjunction a good or bad aspect?

Neither by itself. The conjunction is classed as neutral: its effect follows the bodies involved rather than the angle, so the same aspect reads very differently between, say, two benefics and two malefics.

Conjunction

0°·neutral·major·default orb ±8°

Classical source

Ptolemy treats conjunction as bodies sharing the same degree. Nature depends on the joined planets - benefic with Jupiter, malefic with Mars or Saturn.

Modern Western reading

Modern reading: fusion of two principles. The combined energies act as one unit, for better or worse depending on the bodies involved.

Conjunction between two planets

Cited reference for this aspect between each pair of planets. Inner-planet pairs only list aspects their orbits can actually form.

Other aspects

Questions

What is a conjunction in astrology?: A major aspect of 0 degrees. Ptolemy treats conjunction as bodies sharing the same degree. Nature depends on the joined planets - benefic with Jupiter, malefic with Mars or Saturn. Modern reading: fusion of two principles. The combined energies act as one unit, for better or worse depending on the bodies involved.
How is the conjunction angle of 0 degrees derived?: 0 degrees means the two bodies share a degree of longitude. Aspects are ratios of the circle rather than arbitrary distances, which is why the major set is small: the major aspects come from the simplest divisions, and each further subdivision produces a narrower, more contested aspect.
What orb should a conjunction use?: This site uses 8 degrees by default for the conjunction. Orb is a convention, not a measured quantity: there is no agreed value, practitioners commonly tighten orbs for minor aspects and for slow-moving bodies, and some assign orb to the planets involved rather than to the aspect. Widen the orb and more aspects appear; narrow it and the same chart looks sparse. Any aspect list is therefore only comparable to another when both state the orb used.
Is the conjunction a good or bad aspect?: Neither by itself. The conjunction is classed as neutral: its effect follows the bodies involved rather than the angle, so the same aspect reads very differently between, say, two benefics and two malefics.

Reference, not advice

This is cultural and astronomical reference, not personal prediction or advice.

Aspect classifications follow classical Western convention. Different traditions assign slightly different orb budgets - the values shown are conservative defaults used throughout this site.

Sources

Ptolemy, Tetrabiblos

Last reviewed 2026-05-28.