The desert cold of a seventh-century Arabian night was the kind of dry, absolute cold that made counting stars feel like a survival skill. A bedouin navigator, hauling water skins across the Rub al-Khali, knew that the moon on a given night sat inside one of twenty-eight invisible houses. The house that mattered most at that moment was the one whose name meant “the tail”: Al Dhanab. It marked the lowest point of the moon’s journey through the year, the place where the ecliptic dipped closest to the southern horizon. For the bedouin, that wasn’t geometry. It was the difference between finding water and dying.
Al Dhanab (الذنب) is the twenty-fourth lunar mansion in the traditional Arabic system of manazil al-qamar, corresponding to the star pair Gamma-2 and Delta-2 Sagittarii. It marks the southernmost station of the moon’s monthly circuit, a gate associated with endings, dispersal, and the three coldest weeks of the Arabian winter.
What Exactly Is Al Dhanab in the Lunar Mansions?
The twenty-eight lunar mansions segment the moon’s orbit into stations roughly 13 degrees apart. Each mansion represents where the moon rises on successive nights. Al Dhanab is the twenty-fourth of these stations, positioned in the constellation Sagittarius. Its name translates directly as “the tail,” referring to the tail of the constellation’s archer — itself a borrowing from the earlier Babylonian, Greek, and Indian systems that preceded the Arabic list.
In the standard Arabic enumeration preserved in the 10th-century work al-Qazwini’s Cosmography and the 14th-century Encyclopedia of the Brethren of Purity, Al Dhanab spans 12 degrees and 51 minutes of the ecliptic. The moon passes through this mansion during the last week of December and the first week of January in the Gregorian calendar — the period the bedouin called ash-shita (the depth of winter).
Paul Kunitzsch, in his 1961 study Untersuchungen zur Sternnomenklatur der Araber, identified the visual referent of Al Dhanab as the two stars Gamma-2 and Delta-2 Sagittarii, which bedouin observers called al-dhanab al-asad (the lion’s tail) before the mansion name was standardized. The confusion persists: some medieval star lists call the asterism Alnasl (the arrowhead), but the mansion’s identity is distinct from the star name.
Where Did the Twenty-Fourth Mansion Come From?
The lunar mansion system predates Islam. The 8th-century Arabic philologist Abu Hanifa al-Dinawari, in his Book of Plants, noted that the bedouin used the mansions to time the ripening of dates, the arrival of rains, and the migration of game. Al Dhanab marked the period when the Pleiades (al-Thurayya) set at dawn, a signal that the worst cold was breaking.
The earliest surviving written record of the twenty-eight mansions comes from the 9th-century Persian astronomer al-Farghani (known to Europe as Alfraganus). His Elements of Astronomy lists Al Dhanab as al-dhanab al-qaws (the tail of the bow), confirming that the mansion was already canonical by the Abbasid period. The system traveled into European astrology through the 12th-century Latin translations of Arabic texts — the Liber de stellis fixis of al-Sufi (translated as the Book of the Fixed Stars) gives Al Dhanab as Cauda Sagittarii.
The older Babylonian system, reconstructed from cuneiform tablets (MUL.APIN, ca. 1000 BCE), used a similar 28-station model. The Babylonian equivalent of Al Dhanab was GIRTAB, the Scorpion’s tail, a position later reassigned when Greek and Arabic astronomy shifted the ecliptic coordinates. The Indian Nakshatra system, which also has 27-28 stations, places the star Purva Ashadha in the same region, though the correspondence is approximate.
Arabic planetary magic, preserved in texts like the 13th-century Ghayat al-Hakim (the Picatrix in Latin), assigned each mansion a specific spirit, a stone, a plant, and a type of work appropriate to the moon’s transit. Al Dhanab was classified as a “mansion of destruction,” meaning the division of things that were once whole.
The symbolic logic is straightforward. The tail is the last part of an animal, the trailing edge of a comet, the end of a journey. Al Dhanab governs separation, dispersal, and the dissolution of bonds. The medieval Arabic astrologer Abu Ma’shar (Albumasar), in his Great Introduction to Astrology (completed 848 CE), wrote that matters begun under Al Dhanab tend to “scatter like dry leaves before the north wind.” The mansion’s traditional talisman, a small image of a man without a mouth, was meant to silence enemies and prevent slander from spreading.
That is the core symbolism: the tail cuts what it once followed. Al Dhanab is not evil in the moral sense. It is a house of endings that clear the ground. The bedouin knew that the coldest nights kill the weak animals and the weak plants, and that this is not cruelty but survival.
The Arabic magical tradition, as compiled in the Picatrix (Book IV, Chapter 9), prescribes specific actions during the moon’s transit through Al Dhanab. On the first night, the practitioner draws a circle at the hour of Saturn and inscribes the mansion’s name in Kufic script. The talisman for the mansion is a lead disc engraved with the figure of a man whose mouth is sealed with a bar, used to bring silence to legal proceedings or to stop gossip.
The agricultural use was more widespread. The 10th-century Kitab al-Filaha (Book of Agriculture) by Ibn Wahshiyya advises that crops planted under Al Dhanab produce short, stunted growth. Seeds saved during this mansion do not germinate the following season. The practical farmer avoided planting during the mansion and instead used the period for slaughtering livestock for winter provisions, the cold preserved the meat, and the animals killed at this time were those too weak to survive anyway.
In the folk astrology of the Maghreb, still practiced in rural Morocco and Algeria, the twenty-fourth mansion governs the ribat, a period of binding and unbinding. The shurfa (holy lineages) who inherited the science of the mansions from the 15th-century Sufi Ahmad al-Buni taught that oaths taken under Al Dhanab are broken by the next new moon. Contracts signed during its transit are considered voidable. The remedy is to delay any formal commitment until the moon leaves the mansion, which takes roughly 24 hours.
Every mansion has a character. Al Dhanab’s is singularly negative in the medieval system, but it stands in a precise relationship to the mansion that precedes it and the one that follows.
The twenty-third mansion, Sa’d al-Akhbiyah (the fortune of tents), governs the warmth of the home and the security of the winter camp. Al Dhanab follows it as a release, the heat escapes, the tent flaps are torn, the camp disperses. The twenty-fifth mansion, Sa’d al-Bula’ (the fortune of the swallower), governs the earth swallowing the rain. Al Dhanab sits between security and absorption, the moment after the shelter is breached and before the ground drinks the runoff.
In the Indian Nakshatra system, the station Purva Ashadha (the former unconquered) shares the same stars as Al Dhanab, Gamma and Delta Sagittarii. But the Indian interpretation is purifying and victorious, associated with the god Varuna and the element of water. The Arabic system, drawn from a desert climate where cold meant scarcity, reads the stars as barren. Both can be true: the same gate opens to different rooms depending on the culture that built the door.
The Western sidereal zodiac, preserved in the Tetrabiblos of Claudius Ptolemy (2nd century CE), places the mansion’s influence under the decan of Sagittarius, ruled by Jupiter. Ptolemy noted that the region produced “servile, disgraceful natures”, a characterization that medieval Arabic astrologors repeated without the moral judgment, describing instead the breakdown of hierarchy that Al Dhanab brings.
The most persistent error is confusion between the mansion and the fixed star Alnasl (Gamma-2 Sagittarii). The star Alnasl sits inside the mansion, but the mansion is the whole ecliptic segment, not the star. A practitioner asking the moon’s position for a talisman needs the degree of the moon, not the location of a star visible to the naked eye.
A second mistake is treating the mansion as purely malefic. The Picatrix and the Ghaya do classify Al Dhanab as a mansion of destruction, but they also list its beneficial uses: the silence talisman, the protection against slander, the binding of enemies. Destruction is a tool, not a curse. The bedouin who slaughtered a sick goat under Al Dhanab was not performing black magic. He was feeding his family.
Third, the claim that the lunar mansion system originated in Islam is false. The pre-Islamic bedouin used the mansions for navigation and agriculture. The Quran mentions the mansions in Surah Yunus (10:5): “And the moon, We have determined for it mansions, until it returns like an old palm frond.” The verse confirms an existing practice, it does not invent one.
FAQ
Is Al Dhanab the same as the star Alnasl?
No. Alnasl is the star Gamma-2 Sagittarii, which falls within the mansion. The mansion is a 13-degree segment of the ecliptic, not a single star.
Can I use Al Dhanab for love magic?
Medieval sources advise against it. The mansion governs separation and dispersal. Love workings are assigned to earlier mansions like al-Sharatan or al-Baldah.
What metal is associated with Al Dhanab?
Lead. The Picatrix specifies a lead talisman engraved during the mansion’s transit, at the hour of Saturn, for works of binding and silence.
Does Al Dhanab appear in Western astrology?
Indirectly. The 28 lunar mansions entered European astrology through the Latin translation of al-Sufi’s Book of the Fixed Stars. Al Dhanab is listed as Cauda Sagittarii in 13th-century Latin manuscripts.
The tail has no forward motion of its own. It follows. That is the nature of Al Dhanab, not a beginning, not an end, but the trailing edge that marks where something passed. The bedouin who read the stars in the cold desert knew the mansion not as a fate but as a fact. It told them when to shelter, when to slaughter, when to hold their tongues. That clarity is what the lunar mansions still offer: not prediction, but the habit of paying attention to where the moon happens to be.
For a full walk through the other twenty-seven stations, see our guide to the lunar mansions. The mathematics of the system, the 13-degree divisions, the sidereal corrections, the Arabic star names, is covered in our glossary of fixed stars. The relationship between Al Dhanab and the Indian Nakshatra Purva Ashadha is explored in our comparative mansions guide.