An illustration of how this functions: if a star's place is measured by anyone right now, they then use a regular transformation to obtain the place expressed with regards to the standard reference frame of J2000, and it is often then this J2000 situation that is shared with Other individuals.Astronomical portions may be laid out in any of a number
Epoch vs . equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the regular equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian decades and J2000Epoch on the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal backlinksWhilst a system's behavior following overflow occurs is not really au
By way of example, orbital aspects, Specifically osculating elements for insignificant planets, are routinely supplied with reference to two dates: first, relative to some latest epoch for all of the elements: but some of the information are dependent on a chosen coordinate system, after which you can it truly is typical to specify the coordinate p