Eugene Cernan was a 20th century American astronaut in NASA's Apollo program. He was a crewmember, along with Stafford and Young, on Apollo 10. As well, he was a crewmember, along with Evans and Schmitt, on Apollo 17. During the mission, Cernan was photographed standing next to the American flag on the lunar surface. (Star Trek IV: The Voyage Home; ENT: "First Flight")
In 1986, OMNI magazine selected this photo of Cernan for the cover of their May issue. (Star Trek IV: The Voyage Home)
In 2143, the assignment patches for Apollo 10 and Apollo 17 were on display at the 602 Club. Both patches bore his last name. (Star Trek IV: The Voyage Home; ENT: "First Flight")
OMNI was from the website isfdb.com. 
The photographer for the lunar shot was Schmitt.