22P/Kopff
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.
14" reflector imaged on 2009-06-27 | |
| Discovery | |
|---|---|
| Discovered by | August Kopff |
| Discovery date | August 23, 1906 |
| Designations | |
Alternative designations | 1906 Q1, 1919 O1 |
| Orbital characteristics | |
| Epoch | December 9, 2014 |
| Aphelion | 3.446 AU |
| Perihelion | 1.559 AU |
| Semi-major axis | 3.467 AU |
| Eccentricity | 0.5433 |
| Orbital period | 6.40 yr |
| Inclination | 4.737° |
| Last perihelion | March 18, 2022 October 25, 2015 May 25, 2009 |
| Next perihelion | 2028-Jun-28 |
| Jupiter MOID | 0.077 AU (11,500,000 km) |
| Physical characteristics | |
| Dimensions | 3.0 km |
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