| Comet | 117P/Helin-Roman-Alu |
|---|
| User | Taras Prystavski |
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| User`s name | Taras Prystavski |
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| Observation's time (UT) | 2013-04-30 06:00:00 |
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| Observation's place | Not set |
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| Comparison stars source | ICQ: MC.But this catalogue hasn`t been submited into database |
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| Method | C |
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| Magnitude | 14.4 |
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| Mag Error | Not set |
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| Coma diameter(') | 0.52 |
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| Tail's length | 1.7' |
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| Coma degree of condensation | Not set |
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| Positional angle of tail (°) | 293 |
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| Aperture | 51.0 cm |
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| Telescope focal length (mm) | 2550 |
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| Telecope Type | Y |
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| Exposure of single frame (sec) | 180 |
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| Phot Region | comparison stars are in the same frame as a comet |
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| Software (with version) | ICQ: A48. Astrometrica 4.8 |
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| Stars Exposure | Not set |
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| Photometric-aperture size | ○ 0.55' |
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| Camera | FL9 |
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| Chip | KA1 |
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| Chip blooming | Anti Blooming Gate |
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| Number of images | 1 |
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| Magnitude of the comparison star closest in brightness | Not set |
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| Calibration methods | dark-subtracted (and bias-subtracted) + flat-field corrected (flat-fielded) |
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| Pixel size width | 1.6" |
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| Pixel size height | 1.6" |
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| Light pollution zone | Not set |
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| Lm | Not set |
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| SQM-L in zenith | Not set |
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| Observatory code | |
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| Comment | Not set |
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