| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | nikgus |
| User`s name | Николай Гусев |
| Observation's time (UT) | 2018-09-08 21:45 |
| Tool | Celestron SkyMaster 25*100 |
| Observation's place | Заволжск |
| Magnitude | 7.7 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | B - Bobrovnikoff`s method |
| Coma diameter(') | 7 |
| Tail's length | 10' |
| Condensation | 5 |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 10 cm |
| Focal length (mm) | Not set |
| Type of tool | B - Binoculars |
| Magnification | 25 |
| Field of view (°) | 3 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | 5.4 |
| Comment | |
| Morris Format | 2018 Sep 8.91 UT: m1=7.7, Dia.=7', DC=5, Tail: 10 arcmin ...10-cm B (25x) ...Николай Гусев (Заволжск, Россия) |
