| Comet | C/2017 E1 (Borisov) |
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| User | AHale |
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| User`s name | |
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| Observation's time (UT) | 2017-03-25 11:45:00 |
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| Tool | 41-cm reflector |
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| Observation's place | Cloudcroft |
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| Comparison stars source | NP - North Polar Sequence (publ. by the A.A.V.S.O.) |
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| Method | |
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| Magnitude | 11.2 |
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| Coma diameter(') | 2.5 |
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| Tail's length | Not set |
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| Condensation | 2.5 |
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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 | 70.3 |
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| Field of view (°) | 0 |
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| SQM-L in zenith | |
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| Light pollution zone | Blue |
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| Lm | |
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| Comment | C/2017 E1 just happened to rise over the tip-top of one of the tallest trees to my east, and thus dawn was already underway by the time I was able to observe it. It was easy enough to see, but may be a bit brighter than what I've reported. |
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| Morris Format | 2017 Mar 25.49 UT: m1=11.2, Dia.=2.5', DC=2.5 ...40.64-cm L (70.3x) ...Alan Hale (Cloudcroft, U.S.A.) |
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