Open Access Articles- Top Results for Stephan%E2%80%93Oterma


Discovered by Coggia, Jerome E.
Discovery date January 22, 1867
P/1980 L2, P/1942 V1, P/1867 B1, 38P
Orbital characteristics A
Epoch 1981-Apr-26
(JD 2444720.5)[1]
Aphelion 20.920 AU
(near Uranus)
Perihelion 1.5744 AU
(near Mars)
Semi-major axis 11.247 AU
Eccentricity 0.86002
Orbital period 37.72 yr
Inclination 17.981°
Last perihelion December 5, 1980[1][2]
Next perihelion November 10, 2018[2]

38P/Stephan–Oterma (also known as Comet Stephan–Oterma) is a periodic comet with an orbital period of 38 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).[1] It was discovered in January 1867, by Jerome Coggia at Marseilles Observatory, France.[1]


It has perihelion near the orbit of Mars and has aphelion near the orbit of Uranus. Acting like a centaur-hybrid, between the years 1982 and 2067, this object will make close approaches to the giant planets Jupiter, Saturn, and Uranus.[3] If this object did not show a coma and (for some definitions) had a perihelion beyond Jupiter's (5 AU), it would be considered a centaur.

Comet 38P passing within 1.6AU of Uranus in 2067.[3]


  1. ^ a b c d "JPL Small-Body Database Browser: 38P/Stephan-Oterma" (last observation: 1981-04-04; arc: 114.18 years). Jet Propulsion Laboratory. Retrieved 2009-05-07. 
  2. ^ a b Seiichi Yoshida (2004-07-31). "38P/Stephan-Oterma". Seiichi Yoshida's Comet Catalog. Retrieved 2011-10-23. 
  3. ^ a b "JPL Close-Approach Data: 38P/Stephan-Oterma" (last observation: 1981-04-04; arc: 114.18 years). Retrieved 2009-05-07. 

External links

Periodic comets (by number)
38P/Stephan–Oterma Next

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