| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | Artom |
| User`s name | Artyom Novichonok |
| Observation's time (UT) | 2018-08-17 21:50:00 |
| Tool | SW 8'' |
| Observation's place | Fedotovo, Karelia |
| Magnitude | 8.1 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | M - Morris`s method |
| Coma diameter(') | 6 |
| Tail's length | 10' |
| Condensation | s5 |
| Positional angle of tail | 260 |
| Bortl's scale | 2.5 |
| Aperture | 20 cm |
| Focal length (mm) | 1000 |
| Type of tool | L - Newtonian reflector |
| Magnification | 31.3 |
| Field of view (°) | 0 |
| SQM-L in zenith | 20.85 |
| Light pollution zone | Gray |
| Lm | |
| Comment | 16 C; astronomical twilight (Sun -14.1) |
| Morris Format | 2018 Aug 17.91 UT: m1=8.1, Dia.=6', DC=5, Tail: 10 arcmin, in PA 260 deg ...20-cm L (31.3x) ...Artyom Novichonok (Fedotovo, Karelia, Russia) |
