|Discovered by||Liisi Oterma|
|Discovery date||April 8, 1943|
|1942 VII; 1950 III; 1958 IV|
|Orbital characteristics A|
|Epoch||March 6, 2006|
|Semi-major axis||7.228 AU|
|Orbital period||19.43 a|
|Last perihelion||December 22, 2002|
|Next perihelion||July 11, 2023|
39P/Oterma is a periodic comet in our solar system. It has a centaur like orbit with a perihelion greater than Jupiter and a semi-major axis less than Neptune. It is a Chiron-type comet with (TJupiter > 3; a > aJupiter).
39P/Oterma underwent a temporary satellite capture (TSC) by Jupiter in 1936–1938. Such a Jupiter Family Comet is called a “quasi-Hilda comet” (QHC). However, this comet flew through the region near Jupiter over a rather short time, during which the comet did not complete a full revolution orbiting about the planet.
It was active from discovery in 1943, when it had a perihelion of 3.4 AU, until it was perturbed by Jupiter into an inactive centaur orbit in 1963, when it developed a perihelion of 5.4 AU. By 2195 it will have a perihelion distance of 6 AU.
- Seiichi Yoshida (2004-02-21). "39P/Oterma". Seiichi Yoshida's Comet Catalog. Retrieved 2010-02-24.
- Syuichi Nakano (2001-08-24). "39P/Oterma (NK 810)". OAA Computing and Minor Planet Sections. Retrieved 2010-02-24.
- "JPL Close-Approach Data: 39P/Oterma". 2001-09-19 last obs. Retrieved 2009-05-05.
- Ohtsuka, Katsuhito; M. Yoshikawa, D. J. Asher, and H. Arakida (2008). "Quasi-Hilda Comet 147P/Kushida-Muramatsu". Astronomy & Astrophysics 489 (3): 1355. arXiv:0808.2277. Bibcode:2008A&A...489.1355O. doi:10.1051/0004-6361:200810321.
- Kronk, Gary W. (2001–2005). "39P/Oterma". Retrieved 2008-10-22. (Cometography Home Page)
- Yeomans, Donald K. "Horizon Online Ephemeris System". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 2008-10-22.
- 39P at Kronk's Cometography
- Orbital simulation from JPL (Java) / Ephemeris
- Centaurs with cometary designation
|Periodic comets (by number)|
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