| Comet | 41P/Tuttle-Giacobini-Kresak |
|---|---|
| User | Peter_Pskov |
| User`s name | Petr Mitrofanov |
| Observation's time (UT) | 2017-04-21 21:30 |
| Tool | Bresser 20x80 |
| Observation's place | Tyamsha |
| Magnitude | 7.6 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | B - Bobrovnikoff`s method |
| Coma diameter(') | 14 |
| Tail's length | Not set |
| Condensation | 2/ |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 8 cm |
| Focal length (mm) | Not set |
| Type of tool | B - Binoculars |
| Magnification | 20 |
| Field of view (°) | 3.2 |
| SQM-L in zenith | |
| Light pollution zone | Green |
| Lm | |
| Comment | visual comparison of brightness with the galaxy М101 |
| Morris Format | 2017 Apr 21.9 UT: m1=7.6, Dia.=14', DC=2.5 ...8-cm B (20x) ...Petr Mitrofanov (Tyamsha, Russia) |
