Canon is information in a fictional universe that is considered genuine or factual.
Both the film and novel of 2001: A Space Odyssey were created at the same time through collaboration between the director of the movie and author of the novel, Stanley Kubrick and Arthur C. Clarke, respectively. Despite this, there are several incongruities between the film and the novel, the largest being the destination for the spacecraft, Discovery One (Saturn in the novel, Jupiter in the film). In the later additions to the Space Odyssey series, Clarke instead chose Jupiter instead of Saturn. Because of these inconsistencies, it is difficult to determine what is canon and non-canon on this wiki.
The novelization of 2001: A Space Odyssey is somewhat different from the film version. But because the sequel novels are more continuous to the film than the novel, the film shall be considered to be more canonical than the novel, though some aspects of the novel can be considered canon. The novels 2010: Odyssey Two, 2061: Odyssey Three, and 3001: The Final Odyssey shall also be considered canon. The film, 2010, because of its incongruities with the novel and the rest of the series, will be considered non-canon.