| Discovery | |
|---|---|
| Discovered by: | A. E. Thatcher |
| Discovery date: | April 5, 1861 |
| Alternate designations: | 1861 I |
| Orbital characteristics A | |
| Epoch: | 2400920.5 (May 25, 1861) |
| Aphelion: | 110.44307381 AU |
| Perihelion: | 0.9207 AU |
| Semi-major axis: | 55.6818869065619 AU |
| Eccentricity: | 0.983465 |
| Orbital period: | 415.5077 a |
| Inclination: | 79.7733° |
Comet C/1861 G1 (Thatcher) is a long-period comet discovered by A. E. Thatcher. It is responsible for the Lyrids meteor shower.[1] Carl Wilhelm Baeker also independently found this comet.