| Comet | C/2009 P1 (Garradd) |
|---|---|
| User | Sd-mail |
| User`s name | Danil Sidorko |
| Observation's time (UT) | 2011-07-31 21:20 |
| Tool | 16" |
| Observation's place | Mezmay |
| Magnitude | 7.9 |
| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 6 |
| Tail's length | 20' |
| Condensation | 5 |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 40.5 cm |
| Focal length (mm) | 1600 |
| Type of tool | L - Newtonian reflector |
| Magnification | 61.5 |
| Field of view (°) | 1.14 |
| SQM-L in zenith | |
| Light pollution zone | |
| Lm | Not set |
| Comment | |
| Morris Format | 2011 Jul 31.89 UT: m1=7.9, Dia.=6', DC=5, Tail: 20 arcmin ...40.5-cm L (61.5x) ...Danil Sidorko (Mezmay, Russia) |
