Not known Details About epoch sign in
Epoch as opposed to equinoxDate-references for coordinate systemsEpochs and durations of validityChanging the common equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian yrs and J2000Epoch from the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal linksAstronomical portions might be specified in any of several strate