| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | antares48 |
| User`s name | P. Jordanov |
| Observation's time (UT) | 2018-08-15 21:30 |
| Tool | Bresser 150/750 |
| Observation's place | Dimitrovgrad-Brod |
| Magnitude | 7.6 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 4.5 |
| Tail's length | 6° |
| Condensation | 5 |
| Positional angle of tail | 250 |
| Bortl's scale | 5 |
| Aperture | 15 cm |
| Focal length (mm) | 750 |
| Type of tool | L - Newtonian reflector |
| Magnification | 28.8 |
| Field of view (°) | 1.74 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | 6.0 |
| Comment | |
| Morris Format | 2018 Aug 15.9 UT: m1=7.6, Dia.=4.5', DC=5, Tail: 6 deg, in PA 250 deg ...15-cm L (28.8x) ...P. Jordanov (Dimitrovgrad-Brod, Bulgaria) |
