OP IS NOT A PROPER ABBREVIATION FOR OPENING. And if it is, it shouldn't be. Just say "Intro" instead.
See also: [link]
Lucky Star is copyright Kagami Yoshimizu, I believe. Heck, I know nothing about it myself, so here:
...although I merely used the name as part of the joke in this comic, because I didn't feel like making up a fake anime name ATM.