On Mon 2017-01-09T22:45:19 +0100, Preben Nørager hath writ: > Julian days count solar days.
No, Julian days count days. Those can be "days" in whatever time scale. The astronomical almanacs had a longstanding set of tables expressed in Julian Ephemeris Date (J.E.D.) which was a count of days of Ephemeris Time. J.D. can equally be used for "days" of TAI, or any other timescale. As noted by the IAU recommendation two decades ago, it is important for the user to specify which time scale is being used for those days. -- Steve Allen <[email protected]> WGS-84 (GPS) UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
