Apollo 2 was an unmanned mission launched in 1966. It was destroyed about six hours into the flight.
You are probably confusing it with Apollo 11 (eleven) the first mission to land on the moon. The astronaut in the command vehicle that stayed in orbit around the moon was Michael Collins.
The Apollo 11
Yes, Neil Armstrong was the Commander of Apollo 11 and Buzz Aldrin was the Lunar Module Pilot.
There was no Apollo 2. Apollo 1 was to have been the first manned Apollo flight, but it caught fire during a routine ground test a month before the scheduled launch. All 3 astronauts inside died. I think you're asking which astronaut orbited the moon while Armstrong and Aldrin walked below. That man would be Michael Collins, who accompanied Armstrong and Aldrin on Apollo 11.
Neil Armstrong, Michael Collins and Edwin Aldrin Neil Armstrong and Edwin "Buzz" Aldrin where the first moonwalkers.
Along with Neil Armstrong , the other astronauts of Apollo 11 were Edwin Aldrin and Michael Collins.
Michael Collins orbited the moon alone in the command module Columbia during the historic landing when Neil Armstrong and Buzz Aldrin descended to the moon's surface in the lunar module Eagle. Also note that Apollo 2 is not an actual Apollo mission. Armstrong, Aldrin and Collins flew on Apollo 11 (that is an eleven, not a roman numeral II)
Neil Armstrong and Buzz Aldrin
It was Apollo 11.
Apollo 11 was comprised of Niel Armstrong, Mike Collins, and Buzz Aldrin.
The crew of Apollo 11 were Neil Armstrong, Edwin Aldrin and Michael Collins.