| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | Koalin |
| User`s name | Darius Gasiūnas |
| Observation's time (UT) | 2018-07-31 21:00 |
| Tool | Sky-Watcher 12 Inch Dobsonian Telescope |
| Observation's place | Деревня Dindos, Ignalinos район, Литва |
| Magnitude | 9.8 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | M - Morris`s method |
| Coma diameter(') | 1.3 |
| Tail's length | 3' |
| Condensation | 6 |
| 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 | 123.3 |
| Field of view (°) | 0.58 |
| SQM-L in zenith | |
| Light pollution zone | |
| Lm | |
| Comment | Mon 86% +8° Sun -14° |
| Morris Format | 2018 Jul 31.88 UT: m1=9.8, Dia.=1.3', DC=6, Tail: 3 arcmin ...30.5-cm L (123.3x) ...Darius Gasiūnas (Деревня Dindos, Ignalinos район, Литва, ) |
