<p>Queries to the <a href="https://ssd.jpl.nasa.gov/sbdb_query.cgi" rel="nofollow noreferrer">JPL Small Body Database</a> or the <a href="https://newton.spacedys.com/astdys/index.php?pc=3.1" rel="nofollow noreferrer">ESA Asteroids Dynamic Site</a> for such bodies return several results.
Some of the bigger ones are:</p>
<p>Centaurs with <em>H</em> &lt; 10 and <em>i</em> &lt; 4°</p>
<ul>
<li><a href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=386968" rel="nofollow noreferrer">386968 (2012 BR61)</a>, <em>q</em> = 11.7 au, <em>Q</em> = 31.6 au</li>
<li><a href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=527328" rel="nofollow noreferrer">527328 (2007 TK422)</a>, <em>q</em> = 17.0 au, <em>Q</em> = 25.2 au</li>
</ul>
<p>TNOs with <em>H</em> &lt; 5 and <em>i</em> &lt; 2°</p>
<ul>
<li><a href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=119951" rel="nofollow noreferrer">119951 (2002 KX14)</a>, <em>q</em> = 37.3 au, <em>Q</em> = 40.9 au</li>
<li><a href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=42301" rel="nofollow noreferrer">42301 (2001 UR163)</a>, <em>q</em> = 36.8 au, <em>Q</em> = 66.4 au</li>
<li><a href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=48639" rel="nofollow noreferrer">48639 (1995 TL8)</a>, <em>q</em> = 39.9 au, <em>Q</em> = 65.0 au</li>
</ul>

CC BY-SA 4.0
2020-11-14T06:22:05.143Z
Thank you. I was looking especially for named objects, but Mr. Ghosh's Wikipedia link provides some: Albion, Arrokoth (Ultima Thule) and Logos. Since Arrokoth and Logos are (contact-)binary objects, especially the celestial body Albion is the kind of object I was looking for.
John
CC BY-SA 4.0
2020-11-14T14:13:57.517Z
@John Relaxing the search criteria above yields Centaurs Hylonome and Echeclus and TNOs Sila-Nunam and Praamzius among others.
Mike G
CC BY-SA 4.0
2020-11-14T14:59:55.623Z
Thank you again. All of them are pretty small, especially the two Centaurs, but their inclination is similar to that of the 8 planets, so why do you say relaxed search criteria? Planet Mercury has an inclination of 7.01° to the ecliptic, we may consider that the upper border, and all the four bodies are within.
John
CC BY-SA 4.0
2020-11-14T15:31:51.960Z
@John The larger *H* and *i* you allow, the more objects you include. Any such choice is arbitrary. :)
Mike G
CC BY-SA 4.0
2020-11-14T17:00:27.793Z
One of them has an inclination of less than 2°. H is not important, rather their size and mass.
John
CC BY-SA 4.0
2020-11-13T20:17:53.537Z
2020-11-13T20:17:53.537Z
Mike G
<p>All the trans-Neptunian object's orbits I know are very inclined compared to those of the eight recognized planets, and Centaur's orbits are highly inclined as well.</p>
<p>Are there any known Centaurs and/or <a href="https://en.wikipedia.org/wiki/Trans-Neptunian_object" rel="nofollow noreferrer">trans-Neptunian objects</a> or TNOs whose orbit isn't significantly inclined to the ecliptic or to the invariable plane, but is on about the same plane as the eight main planets?</p>
<p>And to double check, the hypothetical planet Nine also has a high orbital inclination, doesn't it?</p>

CC BY-SA 4.0
2020-11-13T14:17:34.047Z
Yes, [classical KPOs or cubewanos](https://en.wikipedia.org/wiki/Classical_Kuiper_belt_object) typically have low inclination and low eccentricities. Also, see this picture: https://imgur.com/Z0ynCFj
Nilay Ghosh
CC BY-SA 4.0
2020-11-13T14:48:32.157Z
@NilayGhosh I'd upvote your comment if I could. There really are _some_ examples that have a very low inclination and some that (as I knew already like in case of Makemake) have a very high inclination.
John
<orbital-elements><kuiper-belt><trans-neptunian-object><centaur>
Are there any known low-inclination trans-Neptunian objects?
John
# Are there any known low-inclination trans-Neptunian objects?

(Asked by: username_0 on 2020-11-13)

All the trans-Neptunian object's orbits I know are very inclined compared to those of the eight recognized planets, and Centaur's orbits are highly inclined as well.

Are there any known Centaurs and/or [trans-Neptunian objects](https://en.wikipedia.org/wiki/Trans-Neptunian_object) or TNOs whose orbit isn't significantly inclined to the ecliptic or to the invariable plane, but is on about the same plane as the eight main planets?

And to double check, the hypothetical planet Nine also has a high orbital inclination, doesn't it?

**Tags:** orbital-elements, kuiper-belt, trans-neptunian-object, centaur
> **Comments:**
> **username_1**: Yes, [classical KPOs or cubewanos](https://en.wikipedia.org/wiki/Classical_Kuiper_belt_object) typically have low inclination and low eccentricities. Also, see this picture: https://imgur.com/Z0ynCFj  
> **username_0**: @NilayGhosh I'd upvote your comment if I could. There really are _some_ examples that have a very low inclination and some that (as I knew already like in case of Makemake) have a very high inclination.  

---

## 1 answers

### Answer by username_2 on 2020-11-13. Score: 1 | Accepted answer

Queries to the [JPL Small Body Database](https://ssd.jpl.nasa.gov/sbdb_query.cgi) or the [ESA Asteroids Dynamic Site](https://newton.spacedys.com/astdys/index.php?pc=3.1) for such bodies return several results.
Some of the bigger ones are:

Centaurs with *H* < 10 and *i* < 4°

* [386968 (2012 BR61)](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=386968), *q* = 11.7 au, *Q* = 31.6 au
* [527328 (2007 TK422)](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=527328), *q* = 17.0 au, *Q* = 25.2 au

TNOs with *H* < 5 and *i* < 2°

* [119951 (2002 KX14)](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=119951), *q* = 37.3 au, *Q* = 40.9 au
* [42301 (2001 UR163)](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=42301), *q* = 36.8 au, *Q* = 66.4 au
* [48639 (1995 TL8)](https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=48639), *q* = 39.9 au, *Q* = 65.0 au

> **Comments:**
> **username_0**: Thank you. I was looking especially for named objects, but Mr. Ghosh's Wikipedia link provides some: Albion, Arrokoth (Ultima Thule) and Logos. Since Arrokoth and Logos are (contact-)binary objects, especially the celestial body Albion is the kind of object I was looking for.  
> **username_2**: @John Relaxing the search criteria above yields Centaurs Hylonome and Echeclus and TNOs Sila-Nunam and Praamzius among others.  
> **username_0**: Thank you again. All of them are pretty small, especially the two Centaurs, but their inclination is similar to that of the 8 planets, so why do you say relaxed search criteria? Planet Mercury has an inclination of 7.01° to the ecliptic, we may consider that the upper border, and all the four bodies are within.  
> **username_2**: @John The larger *H* and *i* you allow, the more objects you include. Any such choice is arbitrary. :)  
> **username_0**: One of them has an inclination of less than 2°. H is not important, rather their size and mass.  

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