22P/Kopff
< 22P
14" reflector imaged on 2009-06-27 | |
| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery site | Königstuhl Observatory |
| Discovery date | 23 August 1906 |
| Designations | |
| P/1906 Q1 P/1919 O1 | |
| |
| Orbital characteristics | |
| Epoch | 31 March 2024 (JD 2460400.5) |
| Observation arc | 117.63 years |
| Number of observations | 6,335 |
| Aphelion | 5.323 AU |
| Perihelion | 1.541 AU |
| Semi-major axis | 3.432 AU |
| Eccentricity | 0.55104 |
| Orbital period | 6.357 years |
| Inclination | 4.753° |
| 120.58° | |
| Argument of periapsis | 162.92° |
| Mean anomaly | 115.26° |
| Last perihelion | 18 March 2022 |
| Next perihelion | 28 June 2028 |
| TJupiter | 2.866 |
| Earth MOID | 0.539 AU |
| Jupiter MOID | 0.079 AU |
| Physical characteristics | |
| Dimensions | 3.0 km (1.9 mi) |
| 12.3±0.8 hours | |
| 0.05 | |
| Comet total magnitude (M1) | 11.9 |
Comet Kopff or 22P/Kopff is a periodic comet in the Solar System. Discovered on August 23, 1906, it was named after August Kopff who discovered the comet. The comet was missed on its November 1912 return, but was recovered on its June 1919 return and has been seen at every apparition since. Close approaches to Jupiter in 1938 and 1943 decreased the perihelion distance and orbital period. 22P/Kopff’s last perihelion passage was 18 March 2022. On 13 July 2028 it will pass 0.353 AU (52.8 million km) from Earth.