| Comet | C/2019 Y4 (ATLAS) |
|---|---|
| User | Alexsandr Morozov |
| User`s name | Alexsandr Morozov |
| Observation's time (UT) | 2020-05-18 20:15 |
| Tool | телескоп SW 10 dob |
| Observation's place | Novozybkov |
| Magnitude | 9.8 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 3 |
| Tail's length | Not set |
| Condensation | 2 |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 25.4 cm |
| Focal length (mm) | 1200 |
| Type of tool | L - Newtonian reflector |
| Magnification | 120 |
| Field of view (°) | 0.42 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | |
| Comment | |
| Morris Format | 2020 May 18.84 UT: m1=9.8, Dia.=3', DC=2 ...25.4-cm L (120x) ...Alexsandr Morozov (Novozybkov, Russia) |
