| Comet | C/1799 P1 (Méchain) |
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| User | Mechain |
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| User`s name | Pierre François André Méchain |
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| Observation's time (UT) | 1799-09-03 00:00:00 |
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| Tool | refractor |
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| Observation's place | Paris |
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| Magnitude | 5: |
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| Comparison stars source | |
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| Method | |
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| Coma diameter(') | Not set |
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| Tail's length | 1° |
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| Condensation | |
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| Positional angle of tail | Not set |
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| Bortl's scale | Not set |
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| Aperture | 0 cm |
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| Focal length (mm) | Not set |
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| Type of tool | R - Refractor |
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| Magnification | Not set |
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| Field of view (°) | Not set |
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| SQM-L in zenith | Not set |
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| Light pollution zone | |
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| Lm | Not set |
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| Comment | Méchain's report excerpt: "the nebulosity which surrounded is [also] much more extensive" [comparing to observations from the 7th of September] and also nucleus had become brighter. |
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| Morris Format | 1799 Sep 3. UT: m1=5:, Tail: 1 deg ...0-cm R ...Pierre François André Méchain (Paris, France) |
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