How long does Neptune take to go through the zodiac?

About 165 years (60,182 days) for one full circuit as seen from Earth. That is the synodic figure this site computes ephemeris positions against, not a sidereal orbital period, and it is what determines how long Neptune stays in one sign: roughly one twelfth of the cycle, stretched or compressed by retrograde motion and by the eccentricity of the orbit.

Which sign does Neptune rule?

Neptune rules Pisces. Rulership is a fixed correspondence, so it holds in every chart; what changes chart to chart is whether Neptune actually occupies one of those signs.

Is Neptune a personal planet?

Neptune is classified here as a transpersonal. Transpersonal planets stay in one sign for years, so the placement is shared by an entire generation and says little about an individual on its own.

How often is Neptune retrograde?

Neptune turns retrograde roughly every 367 days. Retrograde motion is apparent, not real: the planet keeps moving forward, but seen from a moving Earth its longitude decreases for a stretch. Because the effect depends on the geometry between two orbits, the interval and the duration both vary between cycles, so a stated average will not match any single retrograde exactly. Live station dates are computed rather than tabulated on this site.

Neptune

transpersonal · cycle 60,182 days · retrograde every 367 days

Dignities

Rules: ♓ Pisces

Hellenistic tradition

Neptune was discovered in 1846 and is not part of classical Hellenistic tradition.

Modern Western reading

Modern Western astrology assigns Neptune rulership of Pisces. Read as dissolution, imagination, and merging.

Questions

How long does Neptune take to go through the zodiac?: About 165 years (60,182 days) for one full circuit as seen from Earth. That is the synodic figure this site computes ephemeris positions against, not a sidereal orbital period, and it is what determines how long Neptune stays in one sign: roughly one twelfth of the cycle, stretched or compressed by retrograde motion and by the eccentricity of the orbit.
Which sign does Neptune rule?: Neptune rules Pisces. Rulership is a fixed correspondence, so it holds in every chart; what changes chart to chart is whether Neptune actually occupies one of those signs.
Is Neptune a personal planet?: Neptune is classified here as a transpersonal. Transpersonal planets stay in one sign for years, so the placement is shared by an entire generation and says little about an individual on its own.
How often is Neptune retrograde?: Neptune turns retrograde roughly every 367 days. Retrograde motion is apparent, not real: the planet keeps moving forward, but seen from a moving Earth its longitude decreases for a stretch. Because the effect depends on the geometry between two orbits, the interval and the duration both vary between cycles, so a stated average will not match any single retrograde exactly. Live station dates are computed rather than tabulated on this site.

Reference, not advice

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

Cycle periods are mean orbital values. Traditional interpretations paraphrased from primary classical and modern sources. See sources.

Sources

Last reviewed 2026-05-28.