| Comet | C/2013 US10 (Catalina) |
|---|
| User | Castor 98 |
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| User`s name | |
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| Observation's time (UT) | 2015-12-31 04:18:00 |
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| Tool | 20x80 binoculars |
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| Observation's place | Brno (244 m a.s.l.) |
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| Comparison stars source | HJ - Magnitudes in the Hipparcos photometric system |
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| Method | S - Sidgwick`s method |
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| Magnitude | :6.6 |
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| Coma diameter(') | 5 |
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| Tail's length | Not set |
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| Condensation | 3.5 |
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| Positional angle of tail | Not set |
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| Bortl's scale | Not set |
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| Aperture | 8 |
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| Focal length (mm) | Not set |
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| Type of tool | B - Binoculars |
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| Magnification | 20 |
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| Field of view (°) | 2.5 |
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| SQM-L in zenith | |
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| Light pollution zone | |
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| Lm | |
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| Comment | Finally I could see it despite not very good observing conditions. Coma was diffuse and circular, tails were not visible. Observation was influenced by thin clouds and moonlight. |
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| Morris Format | 2015 Dec 31.18 UT: m1=6.6:, Dia.=&5', DC=3.5 ...8-cm B (20x) ...Marek Biely (Brno (244 m a.s.l.), Czech Republic) |
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