EPOCH SIGN IN - AN OVERVIEW

An example of how this is effective: if a star's situation is measured by anyone currently, they then use a normal transformation to acquire the situation expressed with regards to the regular reference body of J2000, and it is commonly then this J2000 position that's shared with Some others.The principle use of astronomical quantities specified in

Epoch versus equinoxDate-references for coordinate systemsEpochs and durations of validityChanging the standard equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian a long time and J2000Epoch in the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal linksSo, some stellar positions examine from a star atlas or catalog