| Comet | C/1799 Y1 (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) | 1800-01-05 00:00:00 |
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| Tool | refractor |
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| Observation's place | Paris |
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| Magnitude | 4: |
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| Comparison stars source | AE - Planetary magnitudes from the American Ephemeris and Nautical Almanac |
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| Method | |
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| Coma diameter(') | Not set |
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| Tail's length | 2.5° |
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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 | |
|---|
| Lm | Not set |
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| Comment | Curved tail, particularly distinct near the nucleus. Comet was observed in the morning. |
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| Morris Format | 1800 Jan 5. UT: m1=4:, Tail: 2.5 deg ...0-cm R ...Pierre François André Méchain (Paris, France) |
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