KUR (last lunar visibility before sunrise)

Definition

KUR is the Sumerogram designating the last lunar visibility before sunrise — the morning interval near the end of the lunar month when the waning crescent is last seen rising shortly before the Sun. Rochberg defines it as the date of a time interval of last lunar visibility before sunrise; Hunger and Pingree give the operational definition as the time between moonrise and sunrise on one of the last days of the month. KUR is one of the six Lunar Six time-intervals and, paired with NA plus the month-length indicator, forms one of two scholarly variants of the Lunar Three subset.

In Tradition

Rochberg and Hunger-Pingree concur in treating KUR as the morning-side counterpart to the evening-side first-crescent NA — the lunar-visibility marker that closes the synodic cycle. Rochberg further notes that the conjunctions of Sun and Moon, computed by means of KUR, were among the data needed for computing the time of conception in Babylonian astrology — placing KUR inside both the observational-astronomy and the astrology-of-conception programmes.

In Practice

For the reader of a Babylonian Almanac, Normal Star Almanac, or horoscope, KUR is the morning-side last-visibility-before-sunrise value the scribe records as part of the lunar-data subset. In Rochberg's reading of the Lunar Three, KUR is the third member alongside month-length and full-moon NA = nanmurtu; in Hunger-Pingree's reading of the earlier Normal Star Almanacs, KUR is paired with NA and ŠÚ. The same KUR appears in the pre-ACT crude scheme Hunger-Pingree reconstruct: KUR and NA are both computed from the previous month's value via longitude-dependent additive and subtractive quantities tabulated at the first degree of each zodiacal sign — a deliberately crude precursor scheme that neglects Moon's anomaly and latitude. As observational data KUR supplies the conception-time computation Rochberg flags in horoscope footnotes: a last-visibility moment supplies the parameter the scribe uses to backproject the sun-moon-conjunction anchoring the natal Moon. KUR is the closing observational event of the lunar synodic cycle — the philological mirror to the opening first-crescent visibility.

Historical Origin

Attested across the Babylonian Astronomical Diaries (from -372 onward, with reconstructed antecedents reaching into the 7th century BCE), the Normal Star Almanacs, the Late-Babylonian Almanacs, the Babylonian Horoscopes corpus (~410 BCE to ~50 BCE), and the pre-ACT and ACT lunar procedure-text traditions. Modern critical treatments: Francesca Rochberg, *Babylonian Horoscopes* (American Philosophical Society 1998), Introduction §3, p. 11; Hermann Hunger & David Pingree, *Astral Sciences in Mesopotamia* (Brill 1999), p. 229.

Further Reading

• Francesca Rochberg, Babylonian Horoscopes
• Hermann Hunger & David Pingree, Astral Sciences in Mesopotamia