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Do you actually have a stellium?
A stellium is a cluster of planets in one part of a birth chart. On this page it means three or more of the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto in the same zodiac sign. Enter your birth date and city to see every sign’s count and the exact bodies in it; a birth time is optional.
Lunara convention: 3 or more of Sun–Pluto in one sign · tropical zodiac · Swiss Ephemeris · nodes, Lilith, Chiron and angles not counted
Check your chart for a stellium
Your details are used to calculate this result and aren’t saved or added to the page address. If you open your full chart and choose to buy a reading, the details needed to write it are stored with your order.
What counts as a stellium (and why sources disagree)
There is no single official definition. Some astrologers use three bodies in one sign, as this calculator does; others ask for four or more, so a three-body group is sometimes called a “cluster” rather than a true stellium. Some count bodies within a few degrees of each other even across a sign line, and some look at houses instead of signs. A few include the lunar nodes, Chiron or the Ascendant.
Lunara counts only the ten traditional bodies, by sign, at three or more, and shows you the full list so you can apply a stricter rule yourself. Any group of four or more is marked, so a four-body reader gets an answer too. Neither count is a verdict about you.
Signs versus houses
A sign stellium depends only on the date (and sometimes the Moon’s hour). A house stellium depends on the exact birth time and on the house system, because houses are drawn from the horizon at that minute. This calculator shows house groups only when you enter a time, and labels them Placidus, the system Lunara’s natal chart uses. Other systems (Whole Sign, Koch, Equal) can put the same planets in different houses.
Without a birth time
Most planets stay in one sign for the whole day, but the Moon changes sign about every two and a half days. If you leave the time blank, Lunara checks your whole local birth date in your birth city’s timezone (including daylight-saving changes) and finds the minute any body changed sign. It does not pick a Moon sign for you. Instead it shows the clusters that hold all day without the Moon, then the clusters for each possible Moon sign with the local time window.
Two worked examples (fictional people, real calculations)
“Lucía”: a clear five-body stellium
Lucía is invented for this page. Born 10 January 1990 at 08:40 in Seville (Europe/Madrid):
| Capricorn · 5 | Sun 19.80°, Mercury 16.90°, Saturn 16.70°, Uranus 6.31°, Neptune 12.37° |
|---|---|
| Cancer · 2 | Moon, Jupiter |
| Other signs · 1 each | Venus in Aquarius, Mars in Sagittarius, Pluto in Scorpio |
| Placidus houses | 12th house: Mercury, Saturn, Uranus, Neptune (4). The Sun falls in the 1st house. |
Five bodies in Capricorn is a stellium by both the three- and four-body rules, and the result is the same with no birth time because no body changed sign that day. The house view differs: only four of the five sit in the 12th house, which is why sign and house stelliums are reported separately. Many people born in Capricorn season of 1989–1990 share most of this cluster, since Saturn, Uranus and Neptune were all moving through Capricorn.
“Sam”: the Moon decides
Sam is invented for this page. Born 3 May 1992 in Chicago (America/Chicago), birth time unknown:
| Certain all day | No sign has three bodies without the Moon. Taurus holds Sun and Venus; Capricorn holds Uranus and Neptune. |
|---|---|
| Born 00:00–19:28 CDT | Moon in Taurus → Taurus stellium: Sun, Moon, Venus (3). |
| Born 19:28–23:59 CDT | Moon in Gemini → no stellium under the three-body rule. |
Sam’s answer depends on the birth time, so the calculator shows both possibilities instead of choosing one. Even in the first case, a four-body rule would not count it.
Source: getStelliumCheck (Lunara), Swiss Ephemeris, tropical zodiac, run on 4 October 2026. Degrees are within the sign.
Frequently asked questions
- How many planets make a stellium?
- It depends on the astrologer. Three bodies in one sign is the most common threshold and the one used here; some require four or more. The calculator shows the full count so you can apply either rule.
- Do the Ascendant, nodes or Chiron count?
- Not here. Only the Sun, Moon and eight planets are counted. Some astrologers include other points, which can produce a stellium this calculator does not report.
- Can I have a stellium without knowing my birth time?
- Yes. Signs depend mainly on the date. If the Moon changed sign on your birth date, Lunara shows the certain clusters without the Moon and each possible Moon sign with its local time window.
- Does a stellium mean something specific will happen?
- No. A stellium is a description of where planets were, read symbolically as an area of emphasis. It is not a prediction, a diagnosis or a measure of your character.
Method: Swiss Ephemeris tropical geocentric longitudes for the Sun–Pluto. With a time, positions come from Lunara’s natal chart calculation with Placidus houses. Without a time, the whole local birth date is checked hourly plus both ends and every sign change is found to about a minute. The city determines an IANA timezone; historical clock records can be imperfect. Your details are used for this calculation and aren’t saved by this page; if you open your full chart and buy a reading, the details needed to write it are stored with your order. Text written with AI assistance.