The Objective of the 20" Alvan Clark
September 2003 |
Jim Hendrickson and Dan Lorraine examine diffraction gratings that were placed over the objective of the telescope.
| Sun | Moon | |||
|---|---|---|---|---|
| Rise | 5:11 | 01:44 | ![]() | 25.8d |
| Set | 20:21 | 15:18 | 14.9% | |

Jim Hendrickson and Dan Lorraine examine diffraction gratings that were placed over the objective of the telescope.