Astrolabe (Mesopotamian star-list)

Definition

Astrolabe is the conventional modern-scholarly name (Schott's preferred alternative "twelve-times-three" / German Zwölfmaldrei = Akkadian-Sumerian mul.meš 3.ta.àm) for a family of Mesopotamian cuneiform star-list tablets that assign three stars — one from each Path of Enlil, Anu, and Ea — to each of the twelve schematic months of the ideal year. The genre is the principal pre-MUL.APIN heliacal-rising apparatus. Surviving exemplars include the Boghazköy Star-List, the Pinches-type tablets (after LBAT 1499, Pinches 1900), Astrolabe B (VAT 9416 = KAV 218, ~12th century BCE), and the Donbaz-Koch (1995) "third-generation" Nv. 10 from Nineveh.

In Tradition

Hunger and Pingree treat the Astrolabe corpus as predating MUL.APIN, with Astrolabe B (~–1100) anchoring the typology of the 36-star schematic ideal-year catalogue. Brown frames the astrolabes as the foundational stellar-timekeeping corpus organising monthly heliacal risings by celestial-path band, attested in both list and circular layouts. Neugebauer flagged the genre as the oldest preserved Mesopotamian astronomical document class.

In Practice

For the student of early Babylonian celestial science, the Astrolabe genre is the documentary substrate from which the MUL.APIN compendium and the later horoscopic-zodiacal system grew. The genre organises stars on two cross-cutting axes: (1) the Three-Paths celestial-latitude scheme — north / centre / south, with one star per month per path — and (2) the schematic 360-day ideal calendar of twelve months. In some copies each month or each three-star group is annotated with a numerical value (length of daylight, water-clock weight). Brown identifies the developmental sequence Boghazköy Star-List → Pinches-type tablets → Astrolabe B section B → MUL.APIN star-list. The 30-star catalogue tradition (three groups of ten stars, one per Path) circulates alongside the canonical 36-star tradition per Horowitz & Oelsner (1997/8). EAE Tablet 51 contains omens that use the closely related Three Stars Each material as protasis-source (Reiner-Pingree 1981). Treating the astrolabes as an apparatus rather than a single text matters: the corpus name covers multiple tablet families, not one text-instance.

Historical Origin

Attested from the late second millennium BCE — Astrolabe B (VAT 9416 = KAV 218) copied during the reign of Ninurta-apil-Ekur (~1190-1178 BCE) is the earliest dated exemplar — through Neo-Assyrian recensions and into the first millennium BCE. Modern critical treatments: Hunger & Pingree, *Astral Sciences in Mesopotamia* (1999), Ch. II §A.2 pp. 68-75; Brown, *Mesopotamian Planetary Astronomy-Astrology* (2000), Appendix 1 §26 p. 267; Neugebauer, *Astronomy and History: Selected Essays*, essay [4] p. 54.

Further Reading

• Hermann Hunger & David Pingree, Astral Sciences in Mesopotamia
• David Brown, Mesopotamian Planetary Astronomy-Astrology
• Otto Neugebauer, Astronomy and History: Selected Essays