| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | Koalin |
| User`s name | Darius Gasiūnas |
| Observation's time (UT) | 2018-08-21 23:50 |
| Tool | Sky-Watcher 12 Inch Dobsonian Telescope |
| Observation's place | |
| Magnitude | 7.8 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | M - Morris`s method |
| Coma diameter(') | 4.5 |
| Tail's length | 15' |
| Condensation | 4/ |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 30.5 cm |
| Focal length (mm) | 1500 |
| Type of tool | L - Newtonian reflector |
| Magnification | 88.2 |
| Field of view (°) | 0.74 |
| SQM-L in zenith | |
| Light pollution zone | |
| Lm | |
| Comment | |
| Morris Format | 2018 Aug 21.99 UT: m1=7.8, Dia.=4.5', DC=4.5, Tail: 15 arcmin ...30.5-cm L (88.2x) ...Darius Gasiūnas (, ) |
