On Sat 2019-01-19T12:15:28-0800 Steve Allen hath writ: > The most expedient place to find them are roughly pages B7 to B12 in a > current Astronomical Almanac. See for example > https://babel.hathitrust.org/cgi/pt?id=uc1.31822038913307;view=1up;seq=116
Emphasizing one point, it has always been important to use expressions for GMST and such things which are designed for use in the same reference frame as the star catalog. Current star catalogs do not use an equinox as any kind of reference point, therefore any expression for GMST does not simply correspond to the longitude-like coordinate of a current star catalog. GMST now coresponds to a new fictitious point in the sky which is defined with much more complexity than in the old days. What exactly is the intended use case for this project? -- 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 https://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
