| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | jeff42 |
| User`s name | j-philippe remillieux |
| Observation's time (UT) | 2018-09-20 02:00 |
| Tool | orion equinox skywatcher |
| Observation's place | parc naturel régional du pilat |
| Magnitude | 7.8 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 4 |
| Tail's length | Not set |
| Condensation | |
| Positional angle of tail | Not set |
| Bortl's scale | 6 |
| Aperture | 80 mm |
| Focal length (mm) | 500 |
| Type of tool | R - Refractor |
| Magnification | 38.5 |
| Field of view (°) | 1.77 |
| SQM-L in zenith | |
| Light pollution zone | Yellow |
| Lm | |
| Comment | |
| Morris Format | 2018 Sep 20.08 UT: m1=7.8, Dia.=4' ...80-cm R (38.5x) ...j-philippe remillieux (parc naturel régional du pilat, france) |
