| Comet | C/1957 P1 (Mrkos) |
|---|---|
| User | Unknown |
| User`s name | |
| Observation's time (UT) | 1957-08-11 00:00:00 |
| Tool | Naked eye |
| Observation's place | Potsdam |
| Magnitude | 1 |
| Comparison stars source | YG - Yale Bright Star Catalogue |
| Method | E - Beyer`s method |
| Coma diameter(') | Not set |
| Tail's length | Not set |
| Condensation | |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | cm |
| Focal length (mm) | Not set |
| Type of tool | E - Naked eye |
| Magnification | Not set |
| Field of view (°) | Not set |
| SQM-L in zenith | Not set |
| Light pollution zone | |
| Lm | Not set |
| Comment | brightness about 1-2m |
| Morris Format | 1957 Aug 11. UT: m1=1...Naked Eye ... (Potsdam, ) |
