PRIVATE MESSAGE - OFF LIST ========================== On 10 Jun [EMAIL PROTECTED] wrote:
> Is there some way to get TT to better than a tenth of a second, > or is the earth just too sloppy of a time keeper? Dear Brooke, For once, the Earth's spin doesn't enter into it. TT = TAI + 32.184s You can get TAI from TAI = UTC + 33s The "32.184s" was fixed when UTC/TAI was invented. The "33s" you can get from IERS Bulletin-A. It changes whenever there is a leap second, but so too does UTC, and TAI thus remains continuous. http://maia.usno.navy.mil/ser7/ser7.dat TT is the independent variable of astronomical ephemerides. With best wishes. -- ========================================================================== James R Miller WWW/PGP: http://www.jrmiller.demon.co.uk/ Cambridge, England Stardate: 2007 Jun 10 [Sun] 1951 utc ========================================================================== _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
