| Comet | C/2013 US10 (Catalina) |
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| User | AHale |
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| User`s name | |
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| Observation's time (UT) | 2015-11-22 12:14:00 |
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| Tool | 10x50 binoculars |
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| Observation's place | Cloudcroft |
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| Comparison stars source | YG - Yale Bright Star Catalogue |
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| Method | M - Morris`s method |
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| Magnitude | :6.1 |
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| Coma diameter(') | 2 |
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| Tail's length | 5 |
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| Condensation | 6.5 |
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| Positional angle of tail | 170 |
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| Bortl's scale | Not set |
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| Aperture | 5 |
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| Focal length (mm) | Not set |
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| Type of tool | B - Binoculars |
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| Magnification | 10 |
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| Field of view (°) | 5.6 |
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| SQM-L in zenith | |
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| Light pollution zone | Green |
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| Lm | |
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| Comment | Clear skies this morning, and I was successful in observing this comet in the dawn sky. It was fairly easy to detect, but unfortunately it was in a pretty blank star field, and thus there wasn’t much in the way of stars with which to make brightness and size measurements. So, the brightness and size measurements here should be considered approximate (the coma size really isn’t much more than an educated guess). The comet was clearly brighter than HD 126131 (V = 6.7) that was one degree to the east. There was possibly a faint wisp of tail perhaps 5’ long extending roughly southward (p.a. ~170) but with the low altitude and the brightening sky I’m not at all sure that this was real. |
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| Morris Format | 2015 Nov 22.51 UT: m1=6.1:, Dia.=&2', DC=6.5, Tail: 5 deg, in PA 170 deg ...5-cm B (10x) ...Alan Hale (Cloudcroft, U.S.A.) |
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