General Assembly / IAU Service / United Kingdom Hydrographic Office / Fundamental Astronomy Commission / International Earth Rotation Service / Her Majesty’s Nautical Almanac Office / SOFA Center / International Astronomical Union Division / /
Person
Earth / DAT DTDB / TAI TT / Julian Day / Venus Star / Toshio Fukushima / Julian Epoch / Julian Dates / P. Kenneth Seidelmann / /