Catechism of the Catholic Church §2680 — excerpt
Prayer is primarily addressed to the Father; it can also be directed toward Jesus, particularly by the invocation of his holy name: "Lord Jesus Christ, Son of God, have mercy on us sinners."
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.