Aug. 21, Sonneberg
| Title | Aug. 21, Sonneberg |
| Category | Comets |
| Sub-Category | Comet Mrkos 1957 |
| Description | Photograph of Comet Mrkos, 21 August 1957 taken from Sonneberg Observatory. |
| Date | 21 August 1957 |
| Copyright | © Sir Patrick Moore |
| Index Reference | a104 |
