| Comet | C/2015 V2 (Johnson) |
|---|
| User | chergen |
|---|
| User`s name | Carl Hergenrother |
|---|
| Observation's time (UT) | 2017-02-12 11:16:00 |
|---|
| Observation's place | Not set |
|---|
| Comparison stars source | ICQ: U4. UCAC4 photometry catalog |
|---|
| Method | V |
|---|
| Magnitude | 12.2 |
|---|
| Mag Error | Not set |
|---|
| Coma diameter(') | 1.3 |
|---|
| Tail's length | Not set |
|---|
| Coma degree of condensation | Not set |
|---|
| Positional angle of tail (°) | Not set |
|---|
| Aperture | 51.0 cm |
|---|
| Telescope focal length (mm) | 3570 |
|---|
| Telecope Type | C |
|---|
| Exposure of single frame (sec) | 60 |
|---|
| Phot Region | comparison stars are in the same frame as a comet |
|---|
| Software (with version) | ICQ: IRA. IRAF |
|---|
| Stars Exposure | Not set |
|---|
| Photometric-aperture size | ○ 1.3' |
|---|
| Camera | FL9 |
|---|
| Chip | KA9 |
|---|
| Chip blooming | |
|---|
| Number of images | 3 |
|---|
| Magnitude of the comparison star closest in brightness | Not set |
|---|
| Calibration methods | dark-subtracted (and bias-subtracted) + flat-field corrected (flat-fielded) |
|---|
| Pixel size width | 0.8" |
|---|
| Pixel size height | 0.8" |
|---|
| Light pollution zone | Not set |
|---|
| Lm | Not set |
|---|
| SQM-L in zenith | Not set |
|---|
| Observatory code | |
|---|
| Comment | Not set |
|---|
