Film positive (7 3/4" x 9 7/8") Nebula N.G.C. 5194/5.M51
- Made:
- 1923 in Mount Wilson
Film positive (7 3/4" x 9 7/8") Nebula N.G.C. 5194/5.M51, exposure 10 3/4 hours, 60-inch telescope, enlarged 6.3 diam.
Film positive (7 3/4" x 9 7/8") Nebula N.G.C. 5194/5.M51, exposure 10 3/4 hours, 60-inch telescope, enlarged 6.3 diam.