| Comet | C/2019 Y4 (ATLAS) |
|---|---|
| User | nikgus |
| User`s name | Николай Гусев |
| Observation's time (UT) | 2020-04-23 22:00 |
| Tool | Celestron SkyMaster 25*100 |
| Observation's place | Заволжск |
| Magnitude | 9.6 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | B - Bobrovnikoff`s method |
| Coma diameter(') | 3 |
| Tail's length | Not set |
| Condensation | 4 |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 10 cm |
| Focal length (mm) | Not set |
| Type of tool | B - Binoculars |
| Magnification | 25 |
| Field of view (°) | 3 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | 5.7 |
| Comment | |
| Morris Format | 2020 Apr 23.92 UT: m1=9.6, Dia.=3', DC=4 ...10-cm B (25x) ...Николай Гусев (Заволжск, Россия) |
