<p>In a <a href="http://iopscience.iop.org/article/10.1086/375560/fulltext/55714.fg10.html" rel="nofollow">solar system model</a> by <a href="http://iopscience.iop.org/article/10.1086/375560/fulltext/55714.text.html" rel="nofollow">Varadi Runnegar and Ghil</a> Earth's inclination varies between 0 and about 0.05 radians (or about 3 degrees)</p>

<p>The variation is rather chaotic, but you may note that there seems to have been a qualitative change in the pattern about 60-70 million years ago</p>

CC BY-SA 3.0
2016-06-09T22:39:40.147Z
2016-06-09T22:39:40.147Z
James K
<p>Please excuse if this has been asked and I just didn't find it.</p>

<p>I have found several references that indicate that the inclination of Earth's orbit varies over a period of ~70,000 years, but I can't seem to find anything that tells what the range of variation is. I know that it's currently at 1.57° to the invariable plane, but I'm looking for the value of the maximum tilt.</p>

<p>Thanks in advance!</p>

<orbital-migration><inclination>
What is the magnitude of variation of Earth's orbital inclination?
MasonChane
# What is the magnitude of variation of Earth's orbital inclination?

(Asked by: username_0 on 2016-06-09)

Please excuse if this has been asked and I just didn't find it.

I have found several references that indicate that the inclination of Earth's orbit varies over a period of ~70,000 years, but I can't seem to find anything that tells what the range of variation is. I know that it's currently at 1.57° to the invariable plane, but I'm looking for the value of the maximum tilt.

Thanks in advance!

**Tags:** orbital-migration, inclination


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## 1 answers

### Answer by username_1 on 2016-06-09. Score: 3 | Accepted answer

In a [solar system model](http://iopscience.iop.org/article/10.1086/375560/fulltext/55714.fg10.html) by [Varadi Runnegar and Ghil](http://iopscience.iop.org/article/10.1086/375560/fulltext/55714.text.html) Earth's inclination varies between 0 and about 0.05 radians (or about 3 degrees)

The variation is rather chaotic, but you may note that there seems to have been a qualitative change in the pattern about 60-70 million years ago


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