Free stellium calculator

Do you have a stellium? And is it yours?

About 20 in 100 charts have four or more planets in one sign. Many of those are partly shared with everyone born around the same time. Enter your birth details and we'll check yours, and say which parts are yours.

This is just one shape. Your whole chart shows you your birth chart drawn out, your Sun, Moon and rising sign, and the one shape in your chart that is most worth a closer look.

See your whole chart

Also in your chart

Here is the same check for the other shapes. You can open any of them to see yours in detail.

If you'd like a reading, the options are at the bottom of this page.

Would you like to look closer?

A reading is created from the whole of your chart, not just one shape. Your birth details are already here, so the form below takes you straight to a secure payment page.

It arrives in a private learning portal, with a chat function you can ask about it. If you are not sure what a reading looks like, you are welcome to read three chapters from a real one, which is my own.

Your reading · ~~usually £90~~ £60 special offer An in-depth reading of every part of your chart and how they work together, chapter by chapter, with diagrams drawn from your chart. It includes the areas of your life, such as home, work, money and partnership. The full unlock · £180 Your reading tells you what your chart holds, and this takes you into it. It is your reading, the areas of your life included, with what's live for you now added. The planets have kept moving since you were born, and as each one passes over a place in your chart, that part of you tends to come to the front for a while. This looks at the next six months and shows which parts of your chart are being reached, how closely, and when. As each date arrives, you can check it against your own life. It comes with a practice companion: guided practices drawn from your own reading. If you have already paid for a reading, what you paid is taken off the £180. This one is made to order, so there's nothing to pay now and I'll reply by email.

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Send the birth details above with my request, to be stored securely and used only to prepare it.

You'll be taken to a secure Stripe page to pay £60 by card. Your reading is delivered within 7 days of my starting it, and you can cancel for a full refund within 14 days of paying, until I start. The terms cover cancelling and refunds.

If you'd like to ask me something first, you're welcome to get in touch.

What is a stellium?

A stellium is four or more of the ten planets, the Sun and Moon included, falling in the same sign. Its spread is the distance from the first of them to the last, in degrees.

Four or more planets sit in the same sign, so a lot of you works through that one sign's way of doing things. Astrologers call this a stellium. It gives the sign more weight in a chart, often more than the Sun sign has.

It tends to show as a strong, concentrated focus, and sometimes as a blind spot, since so much runs through one approach. When slow outer planets are part of it, much of it is shared with everyone born within a few years of you. What's more your own is which of the faster planets joined them.

How common is a stellium?

Here's how often one turns up, and how quickly that falls as the planets get closer together, measured across 100,000 random birth charts from 1930 to 2025:

Stellium	Charts with one
Any stellium: four or more planets in one sign	20 in 100
Spread over 10° or less	about 1 in 57
Spread over 5° or less	about 1 in 520

We count the Sun, the Moon and the eight planets, by sign. A stellium's tightness is its spread, first planet to last, and your result is read against this table.

Questions

Is a stellium rare?

No, it's fairly common. Measured across 100,000 random charts, about 20 in 100 have one. A tightly packed one is less common, and about 1 in 520 has four or more planets within 5° of each other.

Is my stellium personal, or shared with my generation?

It's often partly shared. Uranus, Neptune and Pluto stay in a sign for years, so when two of them are in your stellium, everyone born within a few years of you has them there too. Your result says so when that's the case. What's more your own is which of the faster planets joined them.

Which planets count?

We count the Sun, the Moon and the eight planets from Mercury to Pluto. The Moon's nodes, Chiron and the angles aren't counted. A stellium here is by sign, not by house, since where the house lines fall depends on which house system is used.

What if I don't know my birth time?

Most planets barely move in a day, but the Moon moves about 13°, so without a birth time it can't be placed. If three of your planets share a sign and the Moon could have made the fourth, the calculator says it can't be sure rather than saying no.