| Comet | 117P/Helin-Roman-Alu |
|---|
| User | Sergey Shurpakov |
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| User`s name | Sergey Shurpakov |
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| Observation's time (UT) | 2015-12-29 17:16:00 |
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| Observation's place | Not set |
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| Comparison stars source | ICQ: U0.But this catalogue hasn`t been submited into database |
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| Method | C |
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| Magnitude | 16.6 |
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| Mag Error | Not set |
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| Coma diameter(') | 0.35 |
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| Tail's length | Not set |
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| Coma degree of condensation | 8.5 |
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| Positional angle of tail (°) | Not set |
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| Aperture | 25 cm |
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| Telescope focal length (mm) | 1250 |
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| Telecope Type | L |
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| Exposure of single frame (sec) | 60 |
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| Phot Region | |
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| Software (with version) | ICQ: A32. Astrometrica 3.25 |
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| Stars Exposure | Not set |
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| Photometric-aperture size | ○ 0.35' |
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| Camera | AAL |
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| Chip | SAL |
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| Chip blooming | |
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| Number of images | Not set |
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| Magnitude of the comparison star closest in brightness | 16.9 |
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| Calibration methods | dark-subtracted (and bias-subtracted) |
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| Pixel size width | 1.1" |
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| Pixel size height | 1.1" |
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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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