July 27, 2019
3:55 p.m.
Another good paper on delta T from Stephenson, Morrison and Hohenkerk is "Measurement of the Earth's rotation: 720 BC to AD 2015". The paper's data, which includes projected values of delta T from the year -2000 to the year +2500, is at http://astro.ukho.gov.uk/nao/lvm/ Also, the IERS in their Bulletin A projects UT1-UTC a year in advance, and gives a formula for extending that projection. It is easy enough to convert UT1-UTC to delta T if you have a table of leap seconds. John Sauter (John_Sauter@systemeyescomputerstore.com) -- PGP fingerprint E24A D25B E5FE 4914 A603 49EC 7030 3EA1 9A0B 511E