39P/Oterma
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| Discovery | |
|---|---|
| Discovered by | Liisi Oterma |
| Discovery date | April 8, 1943 |
| Alternative designations | 1942 VII; 1950 III; 1958 IV |
| Orbital characteristics A | |
| Epoch | March 6, 2006 |
| Aphelion | 8.988 AU |
| Perihelion | 5.469 AU |
| Semi-major axis | 7.228 AU |
| Eccentricity | 0.2434 |
| Orbital period | 19.43 a |
| Inclination | 1.9444° |
| Last perihelion | December 22, 2002[1][2] |
| Next perihelion | July 11, 2023[1][2] |
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).[3]
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.[4]
It was active from discovery in 1943, when it had a perihelion of 3.4 AU,[5] until it was perturbed by Jupiter into an inactive centaur orbit in 1963,[3] when it developed a perihelion of 5.4 AU.[5] By 2195 it will have a perihelion distance of 6 AU.[6]
References
- ↑ 1.0 1.1 Seiichi Yoshida (2004-02-21). "39P/Oterma". Seiichi Yoshida's Comet Catalog. Retrieved 2010-02-24.
- ↑ 2.0 2.1 Syuichi Nakano (2001-08-24). "39P/Oterma (NK 810)". OAA Computing and Minor Planet Sections. Retrieved 2010-02-24.
- ↑ 3.0 3.1 "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.
- ↑ 5.0 5.1 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.
External links
- 39P at Kronk's Cometography
- Orbital simulation from JPL (Java) / Ephemeris
- Centaurs with cometary designation
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| Periodic comets (by number) | ||
|---|---|---|
| Previous 38P/Stephan-Oterma |
39P/Oterma | Next 40P/Väisälä |
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