| Comet | 67P/Churyumov-Gerasimenko
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| User | AHale |
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| User`s name | |
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| Observation's time (UT) | 2015-07-18 10:33:00 |
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| Tool | 41-cm reflector |
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| Observation's place | Cloudcroft |
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| Comparison stars source | NH - North Polar Sequence (publ. by Henden and Kaitchuck, 1982) |
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| Method | M - Morris`s method |
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| Magnitude | 13.6 |
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| Coma diameter(') | 0.6 |
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| Tail's length | Not set |
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| Condensation | 4.5 |
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| Positional angle of tail | Not set |
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| Bortl's scale | Not set |
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| Aperture | 40.64 |
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| Focal length (mm) | 1828.8 |
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| Type of tool | L - Newtonian reflector |
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| Magnification | 228.6 |
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| Field of view (°) | 0 |
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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 | July is normally a pretty cloudy time of year in these parts — summer monsoon — but lately it's been cloudy even by normal July standards. Last night was only the third clear night this month (and one of those was the 1st — right at full moon), and even this morning I had to contend with occasional clouds moving through. I did manage to get a visual observation of Comet 67P; it was faint, but not difficult to see in the 41 cm scope. I detected clear motion over an interval of half an hour. |
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| Morris Format | 2015 Jul 18.44 UT: m1=13.6, Dia.=0.6', DC=4.5 ...40.64-cm L (228.6x) ...Alan Hale (Cloudcroft, U.S.A.) |
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