Information about the Sun is published in Section C of The Astronomical Almanac. The data include notes and formulae for: the mean orbital elements; apparent ecliptic coordinates; times of transit; elements of rotation; and heliographic coordinates Daily tabulations of ecliptic and equatorial coordinates, distance, horizontal parallax, semi-diameter and ephemeris transit time are given. Daily geocentric rectangular coordinates are tabulated for the edition year.

  • Synodic rotation numbers
  • Ecliptic and equatorial coordinates - daily ephemeris
  • Heliographic coordinates, horizontal parallax, semidiameter and time of ephemeris transit
  • Geocentric rectangular coordinates - daily ephemeris
  • Formulas for Sun's coordinates and the equation of time
The Astronomical Almanac Online! 2020