Propping up a dodgy memory

I'm guessing that Marooned failed at the box office because too many people had already lost interest in the space program by the end of 1969. It wasn't released here until after the Apollo 13 mission: I remember seeing the trailers for it in a cinema here and thinking it was about Apollo 13! (I finally saw it on TV years later, probably after Skylab had come down, and remember quite liking it.)