29P/Schwassmann–Wachmann
< 29P
29P/Schwassmann-Wachmann imaged by Gemini Observatory in 2021 | |
| Discovery | |
|---|---|
| Discovered by | Arnold Schwassmann Arno Arthur Wachmann |
| Discovery site | Hamburg Observatory |
| Discovery date | November 15, 1927 |
| Designations | |
| P/1902 E1; P/1927 V1 | |
| 1908 IV; 1927 II; 1941 VI; 1957 IV; 1974 II; 1989 XV | |
| Orbital characteristics | |
| Epoch | January 1, 2023 (JD 2459945.5) |
| Observation arc | 13.83 years |
| Earliest precovery date | 4 March 1902 |
| Number of observations | 622 |
| Aphelion | 6.318 AU |
| Perihelion | 5.777 AU |
| Semi-major axis | 6.047 AU |
| Eccentricity | 0.0447 |
| Orbital period | 14.87 years |
| Max. orbital speed | 12.7 km/s |
| Inclination | 9.364° |
| 312.39° | |
| Argument of periapsis | 50.913° |
| Last perihelion | March 7, 2019 |
| Next perihelion | February 18, 2035 |
| TJupiter | 2.986 |
| Earth MOID | 4.781 AU |
| Jupiter MOID | 0.792 AU |
| Physical characteristics | |
| Dimensions | 60.4 ± 7.4 km (37.5 ± 4.6 mi) |
| 12.1 ± 1.2 days | |
| 0.033 | |
| Comet total magnitude (M1) | 10.1 |
Comet 29P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 1, was discovered on November 15, 1927, by Arnold Schwassmann and Arno Arthur Wachmann at the Hamburg Observatory in Bergedorf, Germany.