Why most of astronaut from NASA Astronaut group 4 the scientist except Harrison Schmit was omitted assignment?

[Pawelk198604]

Most of Astronaut from group 5 get an assignment in Apollo mission

[Nibb31]

Basically, because the Apollo program was cancelled. Schmitt was the only geologist in the group. Therefore, he had higher priority to fly an Apollo lunar mission. He was originally assigned to Apollo 18, but was bumped up to Apollo 17 when 18 was cancelled. The others were physics or medical specialists, whose specializations were obviously a lower priority for the lunar landings.

Graveline resigned from NASA in 1965 before being assigned a mission due to his divorce (which would have caused some awkwardness at NASA in the 1960's).

Michel resigned from NASA in 1969 when he realized he wouldn't get to fly on Apollo.

Garriot, Gibson, and Kerwin stayed at NASA and got to fly to Skylab. Garriot flew again on the Shuttle. Even though they never landed on the Moon, they ended up spending more time in space than Schmitt.

https://en.wikipedia.org/wiki/NASA_Astronaut_Group_4

 

Edited August 9, 2018 by Nibb31