I wrote in a previous blog post that non-professional space travelers (space tourists) should have a term other than “Astronaut.” This AP article takes on the topic.
The dividing line for me seems to be, “are you going to work for a public or private space agency.” If yes, Astronaut, if no, Astrotaxedia is my preferred term.
Bill Nelson current NASA admin and former shuttle rider, Astrotaxedia
Inspiration 4 crew Astrotaxedia
Pilot of Virgin Galactic Spaceplane Astronaut
Passenger on Virgin Galactic Spaceplane Astrotaxedia