| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | Sergey-B |
| User`s name | Sergey Bezruchenko |
| Observation's time (UT) | 2018-09-20 17:00 |
| Tool | SW DOB 200/1000 |
| Observation's place | с.Чугуевка |
| Magnitude | 7.8 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | M - Morris`s method |
| Coma diameter(') | 4.5 |
| Tail's length | 6' |
| Condensation | 4/ |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 20 cm |
| Focal length (mm) | 1000 |
| Type of tool | L - Newtonian reflector |
| Magnification | 58.8 |
| Field of view (°) | 0.88 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | 5 |
| Comment | |
| Morris Format | 2018 Sep 20.71 UT: m1=7.8, Dia.=4.5', DC=4.5, Tail: 6 arcmin ...20-cm L (58.8x) ...Sergey Bezruchenko (с.Чугуевка, Россия) |
