Quick answer: The lunar mansions (Arabic manāzil al-qamar) divide the ecliptic into 28 parts that follow the Moon's roughly 27.3-day return to the same fixed star, not its 29.5-day cycle of phases. Each equal mansion spans about 12°51'. In classical practice, a mansion describes the timing quality of a moment for beginning an undertaking.
Astrologers have long mapped the band of stars the Moon crosses each month, giving each stage of its journey its own character. Three great traditions built parallel systems on this idea. Because they are easily confused, it helps to set out plainly what the mansions are and how they were used.
What are the 28 lunar mansions?
The Moon takes about 27.32 days (27 days, 7 hours, 43 minutes) to return to the same fixed star. This span is called the sidereal month. It differs from the 29.53-day synodic month of the phases, which is measured from one new Moon to the next. The mansions track the star-return rather than the phases, which is why they number twenty-seven or twenty-eight rather than twenty-nine or thirty. In the Arabic scheme the ecliptic is cut into 28 equal arcs of 360°/28, about 12°51'26" each (12.857°). The Moon moves roughly 13°10' per day on average, so it crosses close to one mansion daily and rests in a given Arabic station for nearly 23 and a half hours. Each mansion takes its name from a bright star or star-group near the Moon's path. The phrase manāzil al-qamar means the halting-places, or stations, of the Moon.
Manāzil, nakshatras, and xiu: three traditions compared
Three astronomical cultures charted this same lunar belt. The Arabic manāzil are 28 equal ecliptic mansions of about 12°51'. The Indian nakshatras are 27 equal ecliptic divisions of exactly 13°20' (360°/27). Each nakshatra is split into four padas of 3°20', and each carries a planetary lord in the fixed Vimshottari sequence that begins with Ashwinī at 0° sidereal Aries. An optional 28th, Abhijit, sits near the star Vega; it is kept for electional timing but left out of the standard 27 used for birth charts. The Chinese xiu, or lodges, are also 28, but they are unequal in width and defined along the celestial equator rather than the ecliptic. They are grouped into four sets of seven under the Azure Dragon, Vermilion Bird, White Tiger, and Black Tortoise. Treating the 28 Arabic mansions and the 27 Indian nakshatras as one list is a common error. They are not the same.
The anchor stars: the Pleiades, Aldebaran, Regulus, Spica, and Antares
Each mansion is pinned to a marker star, and the brightest of these are landmarks any stargazer knows. Counting from al-Sharaṭayn as the first mansion at 0° Aries: the third is al-Thurayyā, the Pleiades cluster; the fourth is al-Dabarān, Aldebaran, the eye of the Bull (α Tauri); the tenth is al-Jabhah, anchored to Regulus, the heart of the Lion (α Leonis); the fourteenth is al-Simāk, marked by Spica (α Virginis); and the eighteenth is al-Qalb, "the Heart," fixed on Antares (α Scorpii). Each bright star anchors a single mansion. These same stars fill the medieval catalogues, including the illustrated survey of al-Ṣūfī. Since then, precession, the slow drift of the equinox at about 1° every 72 years, has carried these stars roughly 23 to 24 degrees past the boundaries the medieval tables gave them.
Electional and talismanic use in the classical texts
The oldest layer is a star-calendar. The pre-Islamic Arabian anwāʾ tracked the risings and settings of the mansion stars to mark the seasons, the weather, and the farming year. Astrology then gave each mansion a nature, and its central use was electional. To elect a moment means to choose one deliberately: the astrologer picks a time when the transiting Moon sits in a mansion whose quality suits the action being started, whether a journey, a marriage, planting, trade, or the taking of medicine. Al-Bīrūnī tabulated the 28 manāzil with their anchor stars in his Kitāb al-Tafhīm around 1029. The magical tradition went further. The Picatrix and Agrippa's Three Books of Occult Philosophy (Book II) gave each mansion a talismanic image and a matching operation. Read carefully, this is a craft of choosing when to begin. It is a doctrine about the tone of a moment, not a forecast of what will befall a person.
The 28 mansions at a glance
The table below shows the best-known mansions with their marker stars, their schematic degrees counted from 0° Aries, and the natures the tradition assigns them.
| # | Mansion | Star / asterism | Schematic span (0° Aries table) | Traditional nature |
|---|---|---|---|---|
| 1 | al-Sharaṭayn | β Arietis | 0°00'-12°51' Aries | classically read for journeys and medicine |
| 3 | al-Thurayyā | the Pleiades | 25°43' Aries-8°34' Taurus | favorable for voyages, hunting, alchemy |
| 4 | al-Dabarān | Aldebaran (α Tauri) | 8°34'-21°26' Taurus | classically a mansion of discord |
| 10 | al-Jabhah | Regulus (α Leonis) | 25°43' Cancer-8°34' Leo | favorable for building, love, goodwill |
| 14 | al-Simāk | Spica (α Virginis) | 17°09' Virgo-0° Libra | suited to marriage, love, healing |
| 18 | al-Qalb | Antares (α Scorpii) | 8°34'-21°26' Scorpio | classically martial, read for discord |
The span column gives the schematic tropical table counted from 0° Aries. The living stars have since precessed roughly 23 to 24 degrees past these figures, which is why some modern practitioners keep a star-fixed, sidereal reckoning instead. Every entry describes the tone of a chosen moment for beginning something, not a person's fixed destiny.
Frequently Asked Questions
Are the lunar mansions the same as the nakshatras?
No. The Arabic manāzil are 28 equal mansions of about 12°51'. The Indian nakshatras are 27 equal divisions of 13°20', with an optional 28th, Abhijit. Both divide the Moon's path by its marker stars, but they differ in count, width, and much of their doctrine, so treating them as one list is a mistake.
How is a mansion different from a Moon sign?
A Moon sign is one of the twelve 30° signs the Moon occupied at your birth, a broad marker of temperament. A mansion is a much finer 12°51' station tied to one specific star. Its classical use is electional, meaning it describes the quality of a chosen moment rather than a personality. To find yours, see what your Moon sign reveals.
Do the lunar mansions predict the future?
No. In the tradition the mansions describe the symbolic tone of a moment for beginning something. The craft is choosing a favorable time to act, not divining a fixed fate. When a mansion is called suited to a journey or to healing, that is a statement about timing, not a forecast about a person.
Which zodiac do the mansions use, tropical or sidereal?
Sources differ. The Western electional and magical tables count the first mansion schematically from 0° Aries. Whether that 0° is tropical (fixed to the equinox) or sidereal (fixed to the stars) varies by author. Because precession has moved the anchor stars far from their medieval degrees, some practitioners now prefer a star-fixed reckoning.
Choosing a moment, not reading a fate
The mansions reward a good ephemeris and patience more than any belief in destiny. They are a way of asking when a beginning is well-timed. To see where your own Moon and its marker stars fall, cast a free birth chart or explore a fuller personality report, and find more classical pieces on the blog.
