|
Purple Mountain Observatory
10. Transit with Automatic Photoelectric Micrometer It has an aperture of 90 mm, a focal length of 1000 mm and a limiting magnitude of 7 sq. meters, modified in 1980 to have an automatic photoelectric micrometer recording. ⇦ Back to Page 9 On to Page 11 ⇨Hi-Res Pic (178K) Return to Purple Mountain - Page 2 |