diff --git a/docs/_static/elements.png b/docs/_static/elements.png
new file mode 100644
index 00000000..57fabca3
Binary files /dev/null and b/docs/_static/elements.png differ
diff --git a/docs/user/api.rst b/docs/user/api.rst
index 8d95629f..1deefa24 100644
--- a/docs/user/api.rst
+++ b/docs/user/api.rst
@@ -8,6 +8,9 @@ API documentation
 Orbits
 ------
 
+.. figure:: ../_static/elements.png
+   :align: center
+
 .. autoclass:: exoplanet.orbits.KeplerianOrbit
    :inherited-members: