Cancer here is the fourth sign of the zodiac, the crab, ruled by the Moon. This page is about that sign and nothing else. It carries no health meaning of any kind.
Now the claim. Of all twelve signs, Cancer is the one that treats Jupiter best. Old astrology calls this spot the exaltation of Jupiter. It is the seat of honour. And there is a precise address for it: the 15th degree of Cancer, named by Ptolemy in the second century.
Most guides stop at “Jupiter is exalted in Cancer” and move on. This one asks the next question. How many people really have Jupiter at that exact degree? We counted. The answer is below, and so is the method.
Exaltation is a guest of honour, not a deed of ownership
Start with the word. In old astrology, each planet has signs where it works well and signs where it struggles. Astrologers call these the dignities — a rank sheet for planets.
Two ranks sit at the top, and they are not the same.
Rulership is ownership. Jupiter rules Sagittarius and Pisces. Those are its own houses. It walks in, drops its bag, and does as it likes.
Exaltation is different. It is a guest of honour at someone else’s table. Cancer belongs to the Moon. Jupiter is the guest. The host sets the menu, seats him at the head of the table, and everyone treats him well. He has status here, not keys. That gap matters, and we come back to it.
The fall is the mirror image. A planet in fall sits in the sign across from its exaltation. For Jupiter that is Capricorn. Saturn, oddly, is in its detriment in Cancer, the sign across from its home in Capricorn. That is the very sign that lifts Jupiter up. One table, two very different guests.
If the ranking system itself is new to you, we set it out step by step in our guide to what exaltation means in a chart.
Why the Moon’s sign, of all places?
The logic is old and it is worth stating plainly.
Jupiter grows things. It is the planet of scale, of yes, of more. Left alone it inflates. Cancer is the sign of the home, the family, the shell you build to keep soft things safe.
Where this sign pushes one way, Jupiter in Gemini answers with quick verbal curiosity.
Put growth inside a container and you get something useful. Put growth in an open field and you get sprawl. Cancer gives Jupiter walls. The walls are what make the growth mean something.
The second-century writer Claudius Ptolemy, in his Tetrabiblos, ties the choice to warmth and moisture. Jupiter, in his scheme, is warm and moist. Cancer is a water sign. The match is one of temperature, not of poetry. Vettius Valens, writing his Anthologies in the same era, lists Jupiter with children, trust, gifts and inheritance — all things a household holds.
To feel the host’s part in this, read our page on what the Moon means in a chart. The Moon is the landlord here. Jupiter is only passing through.
The 15th degree: we counted, and it is a little more common than chance
Ptolemy did not just name the sign. He named the degree. Jupiter is exalted at 15 degrees of Cancer. A sign is 30 degrees wide, so this is the mid point.
That raises a fair question. How many charts land there?
Our method. We took the position of Jupiter every hour over 67 full laps of Jupiter, 1607 to 2402, from one entry into Aries to the same entry 67 laps later. That is close to seven million moments, spread evenly across almost 800 years. Even spacing matters: births do not cluster by planet, so each sample stands for a slice of real birth times. We used the astronomy-engine library, which is built on the same maths as standard star tables. Signs are tropical, the system used across Western astrology.
Here is what came back.
- Jupiter sat in Cancer for 8.48 out of every 100 moments. Roughly one chart in twelve. That is close to what pure chance would give.
- Jupiter sat between 14 and 16 degrees of Cancer in 0.68 out of every 100 moments. That is about one chart in 146.
- Among charts that do have Jupiter in Cancer, 8.07 in every 100 land in that two degree band.
Look hard at that last line. If Jupiter crawled through Cancer at one steady pace, a two degree band would hold 6.67 in every 100. It holds 8.07. So the exalted degree is a touch more common than an even spread would predict.
The reason is speed. Jupiter does not move at one rate. Some stretches of the sign it crosses fast, others it lingers. Our count shows the crowding clearly. The last degree of Cancer holds 5.28 in every 100 of these charts. The 9th degree holds 2.55, half as many. The sign is lumpy. The 16th degree, half of the honoured band, holds 5.11, one of its thickest stretches.
So the honour is real and it is not common. If your Jupiter falls within a degree of 15 Cancer, you hold a placement that about one person in 146 shares.
What it looks like in a birth chart
A word on terms first. Astrologers split a chart two ways.
A natal placement is where a planet stood at your birth. It does not move. A transit is where that planet is in the sky right now, for everyone at once. Same planet, two very different readings.
For the natal version, the classic reading runs like this. Growth comes through people, not through push. The person builds by taking care of others, and the return arrives later, from the same circle.
Robert Hand, in Horoscope Symbols, reads Jupiter in a water sign as faith that runs on feeling rather than on proof. Liz Greene reads Jupiter through myth: the urge to widen the world, which in Cancer widens the family rather than the map. Demetra George, who rebuilt much of the old Greek material for modern readers, stresses that exaltation is about honour and visibility — the planet is seen, whether or not it is comfortable.
That last point deserves the weight. Exalted does not mean easy. A guest of honour is watched. William Lilly, writing Christian Astrology in London in 1647, warned that a planet in exaltation can act above its station — proud, sure of itself, past the point of good sense. Jupiter already inflates. Give it status in Cancer and the household can grow past what it can hold: too much given, too much taken in, a door that never closes.
The gift and the risk share one root. That is the whole placement in a sentence.
Cancer is the fourth sign, and that matters
In the oldest house system, each of the twelve signs fills exactly one room of the chart. Astrologers call this whole sign houses. Cancer is the fourth sign, and the fourth room covers home, roots and the people who raised you.
So Jupiter in Cancer keeps brushing against the same set of topics however you slice it. The sign says home. The natural room says home. Chris Brennan, who traces this system back to its Greek sources, points out that this doubling was the normal way to read a chart for centuries.
The house count cuts the other way: in our guide to Jupiter in the 2nd house, Cancer is one of the two signs least likely to put Jupiter there under Placidus.
The 3rd house follows the same rule: in Seattle, Jupiter in Cancer lands in the Placidus 3rd house for only 5.7 percent of births, as our page on Jupiter in the 3rd house shows.
Our guide to the sign itself, what the Cancer sign means, fills in the ground this planet is standing on.
The dates: when Jupiter was last in Cancer, and when it comes back
Jupiter takes about twelve years to circle the zodiac. It spends about one year per sign. We ran the same calculation to find the exact moment it crosses each border. Astrologers call that crossing an ingress.
Here are the visits since 1950. All times are UTC.
- 24 May 1954 to 13 June 1955 — 385 days
- 21 September 1965 to 23 May 1967 — see the note below
- 20 August 1977 to 20 April 1979 — see the note below
- 30 July 1989 to 18 August 1990 — 383 days
- 13 July 2001 to 1 August 2002 — 385 days
- 26 June 2013 to 16 July 2014 — 385 days
- 9 June 2025 to 30 June 2026 — 385 days
- 24 May 2037 to 12 June 2038 — 385 days
Jupiter left Cancer on 30 June 2026. It will not enter again until 24 May 2037. Anyone waiting on this transit has a long wait.
Two strange cycles that broke the pattern
Two of those rows carry a note, and they are the most interesting rows in the table.
From Earth, planets sometimes look as if they run backwards. That is what retrograde means. Nothing in space reverses; it is a trick of two moving viewpoints, like a slow train that seems to slide back when a faster one passes.
Twice since 1950, Jupiter went retrograde right on the border of Cancer. It crossed in, backed out, crossed in again, backed out again, and came in a third time.
In 1965 to 1967 it made three separate stays. Total time inside the sign: 329 days. Total span from first entry to final exit: 609 days. In 1977 to 1979 it did the same thing: three stays, 329 days inside, 608 days of span.
Compare that with a plain cycle: one stay, 385 days, done. The broken cycles gave less Jupiter in Cancer spread over more calendar time — 56 fewer days, stretched across twenty months instead of thirteen.
People born in those windows sit in an unusual group. Anyone born on, say, 1 March 1966 has Jupiter in Cancer. Anyone born on 1 December 1966 does not, even though births six months either side of them do. The border moved back and forth across their year.
Our guide to retrograde planets in a birth chart explains what that backwards motion does to a placement.
How to check your own chart
Three steps, no maths.
- Find your birth date in the list above. If it falls inside one of those windows, your Jupiter is in Cancer.
- If it does, get the exact degree from any birth chart calculator. You need your birth time for a clean answer.
- If that degree reads between 14 and 16, you have the exalted degree. One chart in 146.
Born outside every window? Then Jupiter in Cancer is a transit for you, not a birth placement. It touched your chart from 9 June 2025 to 30 June 2026, and it returns on 24 May 2037.
Where the traditions disagree
Not every school reads this the same way, and pretending otherwise would be dishonest.
Greek and medieval astrology treats exaltation as a hard rank. Jupiter in Cancer scores points on a table, and those points feed a verdict about whether the planet can deliver what it promises. Lilly worked this way, and so did the whole trade before him.
Modern psychological astrology, the branch shaped by Liz Greene from the 1970s on, drops the scoring. It asks what the placement means to the person: which need is being fed, which hunger is being covered over. In that frame, an exalted Jupiter is not a good mark. It is a strong drive that has to be steered.
Indian astrology, called Jyotish, also honours Jupiter in Cancer. It uses a different zodiac, though, shifted by roughly 24 degrees. So a chart with Jupiter in Cancer in Western terms can read as Gemini in Indian terms. Two systems, two answers, and both internally sound. Check which one a page is using before you trust the label.
Frequently asked questions
Is Jupiter in Cancer good or bad?
It is the strongest of Jupiter’s twelve sign placements by the old rank sheet. Strong is not the same as easy. The classic warning, from Lilly onward, is excess: a household that gives more than it has, or takes in more than it can hold.
What is the exalted degree of Jupiter?
The 15th degree of Cancer, named by Ptolemy. Our count puts about one chart in 146 within a degree of it, using positions sampled every hour over 67 full laps of Jupiter, 1607 to 2402.
How long does Jupiter stay in Cancer?
About 385 days in a normal cycle. Twice since 1950 — in 1965 to 1967 and in 1977 to 1979 — retrograde motion split the visit into three stays of 329 total days, stretched across twenty months.
When was Jupiter last in Cancer?
From 9 June 2025 to 30 June 2026.
When does Jupiter enter Cancer next?
On 24 May 2037. It leaves on 12 June 2038.
Is exaltation the same as rulership?
No. Rulership is ownership: Jupiter owns Sagittarius and Pisces. Exaltation is a guest of honour in a sign owned by someone else. Cancer belongs to the Moon.
Which sign is the fall of Jupiter?
Capricorn, the sign opposite Cancer. Fall is the weak seat, the mirror of exaltation.
What to do with this
Two things are worth holding on to.
First, the honour is real. Cancer is the sign that treats Jupiter best, and every school of Western astrology since Ptolemy agrees on that point.
Second, the honour is narrow. The full version — Jupiter within a degree of 15 Cancer — shows up in about one chart in 146, and it lands in one of the thicker stretches of the sign.
A birth chart reading can tell you the exact degree, the room it falls in, and what it touches. That is where a general page stops and your own chart starts.