| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | antares48 |
| User`s name | P. Jordanov |
| Observation's time (UT) | 2018-08-12 00:15 |
| Tool | Bresser 150/750 |
| Observation's place | Belite Brezi |
| Magnitude | 8.5 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 4 |
| Tail's length | 7' |
| Condensation | 6 |
| Positional angle of tail | 250 |
| Bortl's scale | 4 |
| Aperture | 15 cm |
| Focal length (mm) | 750 |
| Type of tool | L - Newtonian reflector |
| Magnification | 23.4 |
| Field of view (°) | 2.22 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | 6.5 |
| Comment | |
| Morris Format | 2018 Aug 12.01 UT: m1=8.5, Dia.=4', DC=6, Tail: 7 arcmin, in PA 250 deg ...15-cm L (23.4x) ...P. Jordanov (Belite Brezi, Bulgaria) |
