<p>The <a href="https://ssd.jpl.nasa.gov/sbdb_query.cgi" rel="noreferrer">JPL Small Body Database</a> lists 5 asteroids and 5 comets with q > 4.56 au and Q &lt; 9.04 au.
Two of those asteroid orbits have large uncertainties due to few observations and may not actually meet your criteria. These are fairly well determined:</p>

<ul>
<li>Asteroid <a href="https://minorplanetcenter.net/db_search/show_object?object_id=494219" rel="noreferrer">494219</a> has a highly inclined 14-year orbit which occasionally brings it within 2 au of Jupiter. It was discovered in 2012.</li>
<li>Asteroid <a href="https://minorplanetcenter.net/db_search/show_object?object_id=K00GD7M" rel="noreferrer">2000 GM137</a> has a 22-year orbit which occasionally passes within 2 au of Saturn. It was discovered in 2000, unobserved for a few years, and recovered in 2014.</li>
<li>Comet <a href="https://en.wikipedia.org/wiki/29P/Schwassmann%E2%80%93Wachmann" rel="noreferrer">29P/Schwassmann-Wachmann 1</a> was discovered in 1927, has a nearly circular 15-year orbit, and is known for frequent outbursts.</li>
<li>Comet <a href="https://en.wikipedia.org/wiki/39P/Oterma" rel="noreferrer">39P/Oterma</a> was discovered in 1943 on an 8-year orbit. A 1963 encounter with Jupiter switched it to its present 20-year orbit, where it became dormant and was lost until 2001. Numerical simulations indicate a prior Jupiter encounter in 1937; it was likely also a Centaur before that.</li>
</ul>

CC BY-SA 4.0
2019-02-20T17:22:55.837Z
2019-02-20T17:22:55.837Z
Mike G
<p>According to <a href="https://en.wikipedia.org/wiki/Centaur_(minor_planet)" rel="nofollow noreferrer">Centaur minor planet</a></p>

<blockquote>
  <p>Centaurs are small Solar System bodies with a semi-major axis between those of the outer planets. They generally have unstable orbits because they cross or have crossed the orbits of one or more of the giant planets</p>
</blockquote>

<p>Of all the known ones which I've found and I've seen data, all of them overlaps the orbit of Saturn, with the exception of  (514107) 2015 BZ509 which doesnt overlap the orbit of Saturn but the orbit of Jupiter. </p>

<p>My question is, are there known centaurs which dont overlap the orbits of Jupiter and Saturn but which orbit between those 2 orbits? Or does the definition of Centaur mean they have to cross orbits and an asteroid orbiting between those 2 orbits would be called another name if exists?</p>

<jupiter><saturn><centaur>
Are there known centaurs which orbit between Jupiter and Saturn without crossing their orbits?
Pablo
# Are there known centaurs which orbit between Jupiter and Saturn without crossing their orbits?

(Asked by: username_0 on 2019-02-20)

According to [Centaur minor planet](https://en.wikipedia.org/wiki/Centaur_(minor_planet))

> Centaurs are small Solar System bodies with a semi-major axis between those of the outer planets. They generally have unstable orbits because they cross or have crossed the orbits of one or more of the giant planets

Of all the known ones which I've found and I've seen data, all of them overlaps the orbit of Saturn, with the exception of (514107) 2015 BZ509 which doesnt overlap the orbit of Saturn but the orbit of Jupiter.

My question is, are there known centaurs which dont overlap the orbits of Jupiter and Saturn but which orbit between those 2 orbits? Or does the definition of Centaur mean they have to cross orbits and an asteroid orbiting between those 2 orbits would be called another name if exists?

**Tags:** jupiter, saturn, centaur


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## 1 answers

### Answer by username_1 on 2019-02-20. Score: 7 | Accepted answer

The [JPL Small Body Database](https://ssd.jpl.nasa.gov/sbdb_query.cgi) lists 5 asteroids and 5 comets with q > 4.56 au and Q < 9.04 au.
Two of those asteroid orbits have large uncertainties due to few observations and may not actually meet your criteria. These are fairly well determined:

* Asteroid [494219](https://minorplanetcenter.net/db_search/show_object?object_id=494219) has a highly inclined 14-year orbit which occasionally brings it within 2 au of Jupiter. It was discovered in 2012.
* Asteroid [2000 GM137](https://minorplanetcenter.net/db_search/show_object?object_id=K00GD7M) has a 22-year orbit which occasionally passes within 2 au of Saturn. It was discovered in 2000, unobserved for a few years, and recovered in 2014.
* Comet [29P/Schwassmann-Wachmann 1](https://en.wikipedia.org/wiki/29P/Schwassmann%E2%80%93Wachmann) was discovered in 1927, has a nearly circular 15-year orbit, and is known for frequent outbursts.
* Comet [39P/Oterma](https://en.wikipedia.org/wiki/39P/Oterma) was discovered in 1943 on an 8-year orbit. A 1963 encounter with Jupiter switched it to its present 20-year orbit, where it became dormant and was lost until 2001. Numerical simulations indicate a prior Jupiter encounter in 1937; it was likely also a Centaur before that.


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