Ayé: Ìyàtọ̀ láàrin àwọn àtúnyẹ̀wò

{{ẹ̀kúnrẹ́rẹ́}}

== Àkíyèsí ==

 

<ref name=epoch>All astronomical quantities vary, both [[Secular phenomena|secularly]] and [[Frequency|periodically]]. The quantities given are the values at the instant [[J2000.0]] of the secular variation, ignoring all periodic variations.</ref>