NEW YORK, May 15 : Elon Musk's rocket and satellite maker SpaceX is planning to price its blockbuster initial public offering as early as June 11 and has picked Nasdaq as its listing venue, people familiar with the matter told Reuters on Friday.  SpaceX has accelerated its IPO timeline and is now aiming to flip its prospectus public as early as next Wednesday, with a roadshow launch targeted for June 4 and a market debut as early as June 12, according to three people familiar with the matter.