| Comet | C/2015 V2 (Johnson) |
|---|---|
| User | Peter_Pskov |
| User`s name | Petr Mitrofanov |
| Observation's time (UT) | 2017-04-21 21:25 |
| Tool | Bresser 20x80 |
| Observation's place | Tyamsha |
| Magnitude | 8.4 |
| Comparison stars source | TK - Tycho-2 Catalogue |
| Method | M - Morris`s method |
| Coma diameter(') | 5 |
| Tail's length | 4' |
| Condensation | 3 |
| 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 | |
| Morris Format | 2017 Apr 21.89 UT: m1=8.4, Dia.=5', DC=3, Tail: 4 arcmin ...8-cm B (20x) ...Petr Mitrofanov (Tyamsha, Russia) |
