NASA Photo ID: S63-01419, 63-ASTRO TRAINEES-1
Date Taken: 02/19/63

Astronaut Groups 1 and 2. The original seven Mercury astronauts selected by NASA in April 1959, are seated (left to right): L. Gordon Cooper Jr., Virgil I. Grissom, M. Scott Carpenter, Water M. Schirra Jr., John H. Glenn Jr., Alan B. Shepard Jr., and Donald K. Slayton.

The second group of NASA astronauts, which were named in September, 1962, are standing (left to right): Edward H. White II, James A. McDivitt, John W. Young, Elliot M. See Jr., Charles Conrad Jr., Frank Borman, Neil A. Armstrong, Thomas P. Stafford, and James A. Lovell Jr.

Source: NASA photo in my possession