<p>The paper <a href="https://arxiv.org/abs/2101.09371" rel="nofollow noreferrer">https://arxiv.org/abs/2101.09371</a>
describes a hot-Neptune on a near polar retrograde orbit and discusses three posssible mechanisms to produce such an orbit: nodal precession, disk dispersal-driven tilting or Kozai–Lidov oscillations, all of which depend on a second outer  giant planet.</p>

CC BY-SA 4.0
2021-06-15T17:14:22.397Z
2021-06-15T17:14:22.397Z
sno
<p>Some Hot Jupiters have retrograde orbits. What causes this? Are there any other common factors amongst the planets with these orbits and have any other types of exoplanet been found with retrograde orbits?</p>

CC BY-SA 4.0
2021-06-11T20:30:08.870Z
Could you give reference for your first statement? Also, retrograde orbit with respect to what?
User123
CC BY-SA 4.0
2021-06-11T20:56:03.393Z
Reference: http://www.astro.gla.ac.uk/nam2010/pr10.php retrograde relative to the star's rotation.
sno
CC BY-SA 4.0
2021-06-12T02:24:49.090Z
[Exoplanet HAT-P-6b is retrograde](https://www.aanda.org/articles/aa/abs/2011/03/aa16331-10/aa16331-10.html)
Nilay Ghosh
CC BY-SA 4.0
2021-06-12T07:52:08.650Z
The widely accepted conjecture is that the star systems in question must have suffered a very significant but unknown disruption.
David Hammen
<exoplanet><hot-jupiter><retrograde-orbit>
Retrograde orbits of exoplanets
sno
# Retrograde orbits of exoplanets

(Asked by: username_0 on 2021-06-11)

Some Hot Jupiters have retrograde orbits. What causes this? Are there any other common factors amongst the planets with these orbits and have any other types of exoplanet been found with retrograde orbits?

**Tags:** exoplanet, hot-jupiter, retrograde-orbit
> **Comments:**
> **username_1**: Could you give reference for your first statement? Also, retrograde orbit with respect to what?  
> **username_0**: Reference: http://www.astro.gla.ac.uk/nam2010/pr10.php retrograde relative to the star's rotation.  
> **username_2**: [Exoplanet HAT-P-6b is retrograde](https://www.aanda.org/articles/aa/abs/2011/03/aa16331-10/aa16331-10.html)  
> **username_3**: The widely accepted conjecture is that the star systems in question must have suffered a very significant but unknown disruption.  

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## 1 answers

### Answer by username_0 on 2021-06-15. Score: 1

The paper <https://arxiv.org/abs/2101.09371>
describes a hot-Neptune on a near polar retrograde orbit and discusses three posssible mechanisms to produce such an orbit: nodal precession, disk dispersal-driven tilting or Kozai–Lidov oscillations, all of which depend on a second outer giant planet.


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