Astrological Transit Period: How Long a Transit Lasts, Phase by Phase
Why some transits last days and others years, how to tell which phase you're in, and real 2026–27 dates for Mercury, Mars and Pluto.
An astrological transit period is the stretch of time a moving planet stays in contact with a point in your chart: from when it first comes close, through each exact hit, to when it separates. For the Sun, that can be a few days. For Mars, when it goes retrograde over your degree, it's about six months. For Pluto, it can be close to two years.
So when you look up a transit and wonder how long it will last, the answer depends on two things: how fast the planet moves, and whether it turns retrograde over your degree. Here's how to read the whole length, phase by phase, with real dates from 2026 and 2027. For the bigger picture, start with how planetary transits work.
The five phases of a transit
- Entry. The planet comes within range of your natal point. Things can start to feel different before anything is exact.
- Build. It closes the gap. This is often when a theme becomes hard to ignore.
- Exact hit. The planet reaches your degree, or the degree that squares, opposes or trines it.
- Retrograde pass. If the planet stations retrograde nearby, it backs over your degree and then crosses it again going forward. That's how one transit turns into three exact hits.
- Separation. The planet moves out of range and doesn't come back on this cycle. That date is the honest answer to "when does this end?"
Knowing which phase you're in is most of the answer. A second exact hit means you're in the middle. A last pass means it eases from here.
Three real transit periods, at three speeds
These are general examples, not readings of anyone's chart.
Fast, with a loop: Mercury over 12° Scorpio
Mercury usually crosses a degree in a day. But Mercury turns retrograde on October 24, 2026 at 20°59' Scorpio and turns direct on November 13 at 5°02', so for someone with Mars at 12° Scorpio, Mercury crosses it three times: October 10, November 4 and November 23. The whole shadow runs from October 4 to November 30. Even a fast planet can make a transit period last weeks.
Medium: Mars over 2° Virgo
For someone with Mercury at 2° Virgo, Mars crosses it on November 30, 2026, backs over it on February 16, 2027 while retrograde, and crosses it a last time on May 19, 2027. That's about six months from first hit to last. We laid out the whole cycle in the full Mars retrograde 2027 timeline.
Slow: Pluto square 5° Taurus
Pluto moves so slowly that it can sit near one degree for years. It has been close to 5° Aquarius since 2026. For someone with the Sun at 5° Taurus, the remaining exact squares land on January 21, 2027, September 14, 2027 (while Pluto is retrograde) and November 19, 2027. Pluto stations direct at 4°45' Aquarius on October 17, 2027, just before that last pass. A transit like this is less an event than a season of life.
Saturn sits between Mars and Pluto. Its December 2026 station is a good example of a transit period that looks finished but isn't; here's where Saturn's December station leaves things.
Why the same transit lasts different lengths for different people
Two people can have "Saturn square Mars" and very different transit periods. If your degree sits inside a planet's retrograde zone, you get three passes. If it sits just outside, you get one. And if the planet stations right on your degree, it lingers there for weeks. The same thing happened with this autumn's Venus retrograde; we used it to show how to plan around a retrograde phase by phase.
That's why a snapshot of the sky on one day can't tell you how long a transit lasts. You need the whole arc: when it entered, each exact date, and when it separates.
Finding your own transit periods
To work out your own transit periods by hand, list your natal degrees, then find every date a slow planet reaches each one (or the degrees that square and oppose it), including its retrograde passes. It's doable, and slow.
Some questions worth asking of any transit you're in:
- Which exact hit am I on: the first, the middle or the last?
- Is the planet about to station near my degree?
- When is the separation date, and what would I like to have understood by then?
None of this predicts what will happen. It tells you the shape and the length, and that alone can make a long stretch feel less permanent.
See your own arcs
If you'd like 2027's slow transits laid out by date and degree, the free 2027 Transit Planner is just below.
Starlit Journey does the by-hand work for your own chart: it maps every active transit as a full arc, from entry to separation, using preset orbs. The positions come from the Swiss Ephemeris. The plain-language notes on each phase are written by AI, and labeled that way.
The free 2027 Transit Planner includes phase worksheets for every slow transit in your year.
