Oh! :( I have written DT-UT.
*Terrestrial Time (TT)* : The timescale used for apparent geocentric ephemerides whose unit of time is the SI second<http://www.imcce.fr/en/ephemerides/astronomie/glossaire.php#second>. On 1977 January 1 at 0h TAI, the value of TT is 1977 January 1, 0h 0m 32.184s. This is an ideal timescale whose the practical realization is related to the International Atomic Time <http://www.imcce.fr/en/ephemerides/astronomie/glossaire.php#international_atti>TAI, with TT = TAI + 32.184 s. *ASTRONOMICAL GLOSSARY * http://www.imcce.fr/page.php?nav=en/ephemerides/astronomie/glossaire.php 2009/5/10 Geoff Dudley <[email protected]> > > > Hi guys, > > What's the current Delta-T? (difference beween terrestrial time TT and > Universal Time UT). > > Thanks, > Geoff > > > -- With best regards, Oleg Maliy Zaporozhye Astronomical Club "Altair" [Non-text portions of this message have been removed]
