Astronomical Papers Prepared for the Use of the American Ephemeris and Nautical Almanac

The Astronomical Papers Prepared for the Use of the American Ephemeris and Nautical Almanac is a series of scientific memoirs founded by astronomer Simon Newcomb in 1879. This publication aimed to systematically determine astronomical constants, reinvestigate celestial motion theories, and prepare tables and formulas for calculating ephemerides—tables that provide the positions of celestial bodies over time. These papers were crucial for astronomers and navigators, offering precise data for calculations. Newcomb's work, particularly his tables of planets and the Sun, was highly regarded and used globally for decades. This series also played a role in establishing a unified system of astronomical constants used internationally, fostering collaboration among national ephemerides.12