Stellium calculator
Do you have a stellium? Find out if three or more planets gather in one sign or house of your birth chart, and what that means.
What a stellium is
A stellium is a cluster of three or more planets in the same sign or the same house. It concentrates a large part of your chart in one place, so that sign or area of life becomes a dominant theme: you are instinctively good at it, and you can also overdo it.
Some astrologers ask for four planets, or do not count the fast-moving Sun, Mercury and Venus together, since they are often neighbours. We show every cluster of three or more and list the planets, so you can judge its weight yourself.
Sign stellium and house stellium
A stellium by sign colours your character with that sign's style, even if it is not your Sun sign. A stellium by house points to a field of experience, such as work, home or relationships. House stelliums need your birth time.
Questions
Is a stellium rare?
A three-planet stellium is fairly common, because the Sun, Mercury and Venus always travel close together. Four or more planets in one sign is much less frequent, and whole generations share clusters of slow planets such as the Capricorn group of the late 1980s and early 1990s.
Can a stellium outweigh my Sun sign?
Yes. If you have four planets in a sign that is not your Sun sign, people may recognise that sign in you more easily than your Sun. This is one of the most common reasons someone does not identify with their horoscope sign.