| Comet | 41P/Tuttle-Giacobini-Kresak
|
|---|
| User | Peter_Pskov |
|---|
| User`s name | |
|---|
| Observation's time (UT) | 2017-04-21 21:30 |
|---|
| Tool | Bresser 20x80 |
|---|
| Observation's place | Tyamsha |
|---|
| Comparison stars source | TK - Tycho-2 Catalogue |
|---|
| Method | B - Bobrovnikoff`s method |
|---|
| Magnitude | 7.6 |
|---|
| Coma diameter(') | 14 |
|---|
| Tail's length | Not set |
|---|
| Condensation | 2.5 |
|---|
| Positional angle of tail | Not set |
|---|
| Bortl's scale | Not set |
|---|
| Aperture | 8 |
|---|
| 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) |
|---|
