JPL provides a data generation API that you can telnet into: https://ssd.jpl.nasa.gov/horizons/ https://ssd.jpl.nasa.gov/horizons/ to get the positions and what

JPL provides a data generation API that you can telnet into: https://ssd.jpl.nasa.gov/horizons/ https://ssd.jpl.nasa.gov/horizons/ to get the positions and whatnot of asteroids, planets, spacecraft, etc.