| Comet | 21P/Giacobini-Zinner |
|---|---|
| User | Jerzy Bohusz |
| User`s name | Jerzy Bohusz |
| Observation's time (UT) | 2018-08-01 20:24:00 |
| Tool | TNAk 250 mm |
| Observation's place | Myślin |
| Magnitude | 9.5 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 3.9 |
| Tail's length | 4.5' |
| Condensation | s5 |
| Positional angle of tail | 220 |
| Bortl's scale | Not set |
| Aperture | 25 cm |
| Focal length (mm) | 1175 |
| Type of tool | L - Newtonian reflector |
| Magnification | 97.9 |
| Field of view (°) | 0.51 |
| SQM-L in zenith | |
| Light pollution zone | |
| Lm | |
| Comment | |
| Morris Format | 2018 Aug 1.85 UT: m1=9.5, Dia.=3.9', DC=5, Tail: 4.5 arcmin, in PA 220 deg ...25-cm L (97.9x) ...Jerzy Bohusz (Myślin, Poland) |
