C/1855 L1 (Donati)
< C
| Discovery | |
|---|---|
| Discovered by | Giovanni B. Donati |
| Discovery site | Florence, Italy |
| Discovery date | 3 June 1855 |
| Designations | |
| 1855 II | |
| Orbital characteristics | |
| Epoch | 17 May 1855 (JD 2398720.5) |
| Observation arc | 14 days |
| Number of observations | 49 |
| Aphelion | 79.259 AU |
| Perihelion | 0.5676 AU |
| Semi-major axis | 39.913 AU |
| Eccentricity | 0.98578 |
| Orbital period | 252 years |
| Inclination | 156.871° |
| 262.231° | |
| Argument of periapsis | 22.488° |
| Last perihelion | 30 May 1855 |
| Next perihelion | ~2097 |
| TJupiter | –0.726 |
| Physical characteristics | |
| Comet total magnitude (M1) | 11.3 |
| 8.0 (1855 apparition) | |
Comet Donati, formally designated as C/1855 L1, is a long-period comet that has an orbital period of approximately 252 years. It was the second comet discovered in 1855, and the first of five comets discovered by Italian astronomer, Giovanni Battista Donati.