| Comet | C/1798 X1 (Bouvard) |
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| User | Olbers |
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| User`s name | Heinrich Wilhelm Matthias Olbers |
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| Observation's time (UT) | 1798-12-08 16:48:00 |
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| Tool | refractor |
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| Observation's place | Bremen |
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| Magnitude | |
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| Comparison stars source | |
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| Method | |
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| Coma diameter(') | &5 |
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| Tail's length | Not set |
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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 | Olbers' described comet as a fairly bright nebulosity, which looked like a star cluster. Comet exhibited a very pale, diffuse light. |
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| Morris Format | 1798 Dec 8.7 UT:, Dia.=&5' ...0-cm R ...Heinrich Wilhelm Matthias Olbers (Bremen, Germany) |
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