THE SMART TRICK OF EPOCH SIGN IN THAT NO ONE IS DISCUSSING

Epoch as opposed to equinoxDate-references for coordinate systemsEpochs and intervals of validityChanging the normal equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian a long time and J2000Epoch from the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal hyperlinksSo, some stellar positions study from the star atlas