| Date/Place | 2020-04-10 at Rozzano (MI) | |
| Scope | Vixen SP102M | |
| Camera | Imaging Source DMK41 | |
| Integration | Stack of 700 frames out of 1000. Processing with PIPP, Autostakkert and PixInsight | |
| Comment | Janssen is the largest crater visible in the image (off centre toward the bottom left corner), not immediately visible because its walls were partly destroyed by later craters. It has a diameter of 191km x 115km and it dates back to the Pre-Nectarian period. Inside the crater it is possible to see the Rimae Janssen, a large rill 140km long and 3km wide. |
