Nēberu (Nebiru)

Definition

Nēberu (also Nebiru, nibīru; Akkadian "the Ford" or "crossing-place," cuneiform dNe-bi-ru / mulné-bi-ru) is a celestial-position epithet, most famously associated with the star or planet that "divides the sky in half" at the celestial midpoint per Enūma Eliš V 6 and MUL.APIN I i 37. In the first millennium it functions chiefly as a position-specific name for Jupiter at meridian-crossing, though Horowitz argues it originally designated Mercury — a referent-shift that left both readings live in the omen literature.

In Tradition

Assyriological scholarship treats Nēberu as a cosmologically loaded position-name rather than a simple planet-equivalent. Koch-Westenholz settles that Nēberu is Jupiter's name when crossing the meridian and the 45th name of Marduk in Enūma Eliš VII 124 ff., occasionally denoting Mercury (SAA 8 93 r5). Reiner and Pingree note the BPO 4 scribal interpretation assigning Jupiter three position-names — Šulpaʾe at appearance, Sagmegar one danna higher, Nēberu at the middle of the sky.

In Practice

For the student of Babylonian cosmology and astral religion, Nēberu is the conceptual bridge between mythological cosmography and observational astronomy. Enūma Eliš V places Marduk's setting-fast of the manzāzu of Nēberu at the East point, between Enlil and Ea, where the Ford opens horizon-gates at appointed times — grounding the sky's architecture in divine ordering. MUL.APIN I i 37 supplies the operational form: "One big star — its light is dim — divides the sky in half and stands there: that is the star of Marduk, the Ford." Brown documents Nēberu's use in Sargonid Reports for Jupiter five days after heliacal rising (Mar-Issar text x362:r3) and in the kur-ḫa-ma / sar-ma "to have lit up" idiom suggesting horizon-proximity. Astrolabe B places Nēberu in months XII or I, locking the cosmographic intuition into the calendar. An apodosis using Nēberu rather than Sagmegar signals not a different planet but a different position — meridian-crossing rather than open transit — and that position carries its own ominous weight.

Historical Origin

Attested in Enūma Eliš V 1-10 and VII 124 ff. (composition before the reign of Nebukadnezar I, per Hunger-Pingree); in MUL.APIN I i 37 (~1000 BCE); in Astrolabe B; in BPO 4 K.2212 (Group M) and SAA 8 Report 147; and in Brown's analysis of Neo-Assyrian Reports (texts 8147, 8254, 8323, x362). Horowitz (2014) argues a Mercury-to-Jupiter referent shift. Modern treatments: Hunger-Pingree, *Astral Sciences in Mesopotamia* (1999); Koch-Westenholz, *Mesopotamian Astrology* (1995); Brown, *Mesopotamian Planetary Astronomy-Astrology* (2000).

Further Reading

• Hermann Hunger & David Pingree, Astral Sciences in Mesopotamia
• Hermann Hunger & John Steele, The Babylonian Astronomical Compendium MUL.APIN
• Ulla Koch-Westenholz, Mesopotamian Astrology
• David Brown, Mesopotamian Planetary Astronomy-Astrology