Raw model I got Marathon Crater isn’t one of the long‐known, named lunar features from 19th-century telescopic maps – it was first singled out and i

Raw model I got Marathon Crater isn’t one of the long‐known, named lunar features from 19th-century telescopic maps – it was first singled out and informally “discovered” by NASA in the mid-1960s when Lunar Orbiter imagery and, more definitively, the Surveyor 5 landing (September 1967) identified it. So, very roughly, think “around 1966–67.”